Summary
During the past decade or so increasing attention has been given to refinements in methods and procedures in the study of grassland communities and to more complete characterizations of communities. Advances have been made toward standardization, but it is premature at the present stage of development of grassland ecology to expect rigid formulations of research procedures. It is evident in recent publications that the trend is toward selection and further refinement of methods which will measure as objectively as possible the characteristics that are most significant in a particular investigation. For a complete analysis and description, all characteristics of the community require study.
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Literature Cited
Adamson, R. S. The plant communities of Table Mountain. II. Lifeform, dominance, succession. Jour. Ecol.19: 304–320. 1931.
Ahlgren, H. L. A comparison of methods used in evaluating the results of pasture research. Jour. Am. Soc. Agron.39: 240–259. 1947.
Anderson, K. L. A comparison of line transects and permanent quadrats in evaluating composition and density of pasture vegetation in the tall prairie grass type. Jour. Am. Soc. Agron.34: 805–821. 1942.
Anderson, W. A. Development of prairie at Iowa Lakeside Laboratory. Am. Mid. Nat.36: 431–455. 1946.
Armstrong, S. F. The botanical and chemical composition of the herbage of pastures and meadows. Jour. Agr. Sci.2: 283–304. 1907.
Arny, A. C. Alfalfa and grass percentage determinations with the inclined point apparatus at different stages of development of the mixtures. Jour. Am. Soc. Agron.36: 996–998. 1944.
—, andSchmid, A. R. A study of the inclined point quadrat method of botanical analysis of pasture mixtures. Jour. Amer. Soc. Agron.34: 238–247. 1942.
Ashby, E. Statistical ecology. II—A reassessment. Bot. Rev.14: 222–234. 1948.
Baker, M. L.,et al. Effects of time of cutting on yield and feeding value of prairie hay. Neb. Agr. Exp. Sta., Bul.385: 1–14. 1947.
Bates, G. H. An investigation into the cause and prevention of deterioration of leys. Jour. Brit. Grassl. Soc.3: 176–184. 1948.
Bauer, H. L. The statistical analysis of chaparral and other plant communities by means of transect samples. Ecology24: 45–60. 1943.
Beeson, K. C.,et al. The absorption of mineral elements by forage plants. I. The phosphorus, cobalt, manganese, and copper content of some common grasses. Jour. Am. Soc. Agron.39: 356–362. 1947.
Bharucha, F. R., andDave, R. N. The biological spectrum of a grassland association. Jour. Univ. Bombay13: 15–17. 1944.
Blackman, G. E. A study by statistical methods of the distribution of species in grassland associations. Ann. Bot.49: 749–777. 1935.
—. Statistical and ecological studies in the distribution of species in plant communities. (i) Dispersion as a factor in the study of changes in plant populations. Ann. Bot.6: 351–370. 1942.
Blake, A. K. Viability and germination of seeds and early life history of prairie plants. Ecol. Mono.5: 405–460. 1935.
Booth, W. E. Revegetation of abandoned fields in Kansas and Oklahoma. Amer. Jour. Bot.28: 415–422. 1941.
Braun-Blanquet, J. Plant sociology. 439 pp. 1932.
Brockmann-Jerosch, H. Die Flora des Puschlav und ihre Pflanzengesellschaften. Die Pflanzengesellschaften der Schweizeralpen. 1. 1907.
Brown, R. L. andHafenrichter, A. L. Factors influencing the production and use of beachgrass and dunegrass clones for erosion control. I. Effect of date of planting. Jour. Am. Soc. Agron.40: 512–521. 1948.
——. II. Influence of density of planting. Jour. Am. Soc. Agron.40: 603–609. 1948.
Buechner, H. K. The range vegetation of Kerr County, Texas, in relation to livestock and white-tailed deer. Am. Mid. Nat.31: 697–743. 1944.
Buell, M. F., andWilbur, R. L. Life-form spectra of the hardwood forests of the Itasca Park region, Minnesota. Ecology29: 352–359. 1948.
Cain, S. A. Concerning certain phytosociological concepts. Ecol. Mono.2: 475–508. 1932.
—. Ecological studies of the vegetation of the Great Smoky-Mountains. II. The quadrat method applied to sampling spruce and fir forest types. Am. Mid. Nat.16: 566–584. 1935.
—. The species-area curve. Am. Mid. Nat.19: 573–581. 1938.
—. The climax and its complexities. Am. Mid. Nat.21: 146–181. 1939.
—. Sample-plot technique applied to alpine vegetation in Wyoming. Am. Jour. Bot.30: 240–248. 1943.
—. The characteristics of natural areas and factors in their development. Ecol. Mono.17: 185–200. 1947.
—,et al. Andropogonetum Hempsteadii: a Long Island grassland vegetation type. Am. Mid. Nat.18: 324–350. 1937.
Campbell, R. S., andCassady, J. T. Determining forage weight on southern forest ranges. Jour. Range Mgt.2: 30–32. 1949.
Canfield, R. H. Application of the line interception method in sampling range vegetation. Jour. For.39: 388–394. 1941.
—. Measurement of grazing use by the line interception method. Jour. For.42: 192–194. 1944.
—. Perennial grass composition as an indicator of condition of southwestern mixed grass ranges. Ecology29: 190–204. 1948.
Carpenter, J. R. Concepts and criteria for the recognition of communities. Jour. Ecol.24: 285–289. 1936.
—. The biome. Am. Mid. Nat.21: 75–91. 1939.
—. Fluctuations in biotic communities. V. Aspectation in a mixed-grass prairie in Central Oklahoma. Am. Mid. Nat.22: 420–435. 1939.
—. The grassland biome. Ecol. Mono.10: 616–684. 1940.
—. The biotic community as an object of study. Chron. Bot.6: 386–388. 1941.
Clapham, A. R. Over-dispersion in grassland communities and the use of statistical methods in plant ecology. Jour. Ecol.24: 232–251. 1936.
Clark, I. Variability in growth characteristics of forage plants on summer range in central Utah. Jour. For.43: 273–283. 1945.
Clements, F. E. Plant succession. Carnegie Inst. Wash., Publ. 242. 512 pp. 1916.
-. Plant indicators. Carnegie Inst. Wash., Publ. 290. 388 pp. 1920.
—. The relict method in dynamic ecology. Jour. Ecol.22: 39–68. 1934.
-. The origin of the desert climax and climate.In Essays in Geobotany. Univ. Calif. Press. Pp. 87–140. 1936.
—. Nature and structure of the climax. Jour. Ecol.24: 252–284. 1936.
—. Cycles and climaxes. Chron. Bot.7: 241–243. 1942.
-, andShelford, V. E. Bioecology. 425 pp. 1939.
-,et al. Plant competition. Carnegie Inst. Wash., Publ. 398. 340 pp. 1929.
Cockayne, L. Notes on ecological field work in New Zealand.In Tansley and Chipp, Aims and methods in the study of vegetation. Pp. 274–282. 1926.
Cole, LaMont C. A theory for analyzing contagiously distributed populations. Ecology27: 329–341. 1946.
Collins, R. W., andHurtt, L. C. A method for measuring utilization of bluestem wheat-grass on experimental range pastures. Ecology24: 123–125. 1943.
Conard, H. S. The plant associations of Central Long Island. Am Mid. Nat.16: 433–516. 1935.
—. Plant associations on land. Am. Mid. Nat.21: 1–27. 1939.
Cook, C. W.,et al. Measuring the nutritive content of a foraging sheep’s diet under range conditions. Tour. An. Sci.7: 170–180. 1948.
Cornelius, D. R., andAtkins, M. D. Grass establishment and development studies in Morton County, Kansas. Ecology27: 342–352. 1946.
Cory, V. L. Methods of determining forage preferences of stock. Ecology11: 760–763. 1930.
Costello, D. F. Natural revegetation of abandoned plowed land in the mixed prairie association of northeastern Colorado. Ecology25: 312–326. 1944.
—, andKlipple, G. F. Sampling intensity in vegetation surveys made by the square-foot density method. Jour. Am. Soc. Agron.31: 800–810. 1939.
—, andPrice, R. Weather and plant-development data as determinants of grazing periods on mountain range. U. S. Dept. Agr., Tech. Bul. 686: 1–30. 1939.
Craddock, G. W., andForsling, C. I. The influence of climate and grazing on spring-fall sheep range in Southern Idaho. U. S. Dept. Agr., Tech. Bul. 600: 1–42. 1938.
Crafts, E. C. Height-volume distribution in range grasses. Jour. For.36: 1182–1185. 1938.
Crampton, E. W., andJackson, I. R. C. Seasonal variation in chemical composition of pasture herbage and the relation to its digestibility by steers and sheep. Jour. An. Sci.4: 333–339. 1944.
Crocker, R. L., andTiver, N. S. Survey methods in grassland ecology. Jour. Brit. Grassl. Soc.3: 1–26. 1948.
Culley, M. A densimeter, an instrument for measuring the density of ground cover. Ecology19: 588–590. 1938.
Currie, J. R. The economics of ley farming. Jour. Brit. Grassl. Soc. 3: 27–34. 1948.
Curtis, J. T., andGreene, H. C. A study of relic Wisconsin prairies by the species-presence method. Ecology30: 83–92. 1949.
Darland, R. W., andWeaver, J. E. Yields and consumption of forage in three pasture types: an ecological analysis. Univ. Nebr., Cons. & Surv. Div., Bul. 27. 1945.
Daubenmire, R. F. Exclosure technique in ecology. Ecology21: 514–515. 1940.
—, andColwell, W. E. Some edaphic changes due to overgrazing in theAgropyron-Poa prairie of southeastern Washington. Ecology23: 32–40. 1942.
Davies, W. Methods of pasture analysis and fodder sampling. Welsh Pl. Breed. Sta., Rep. 1. 1931.
—. The history of pasture analysis. Methods of pasture analysis. Agr. Prog.10: 3–9. 1933.
Dice, L. R. Measures of the amount of ecologie association between species. Ecology26: 297–302. 1945.
—. Relationship between frequency index and population density. Ecology29: 389–391. 1948.
Drew, W. B. Studies on the use of the point quadrat method of botanical analysis of mixed pasture vegetation. Jour. Agr. Res.69: 289–297. 1944.
—. Floristic composition of grazed and ungrazed prairie vegetation in Northcentral Missouri. Ecology28: 26–41. 1947.
Du Rietz, G. E. Vegetationsforschung auf soziationsanalytischer Grundlage. Handb. Biol. Arbeitsm. Abt. 11, Teil5: 293–480. 1930.
Dyksterhuis, E. J. The vegetation of the Fort Worth Prairie. Ecol. Mono.16: 1–29. 1946.
—. The vegetation of the Western Cross Timbers. Ecol. Mono.18: 326–376. 1948.
Eggleton, F. E. Fresh-water communities. Am. Mid. Nat.21: 56–74. 1939.
Egler, F. E. Berkshire plateau vegetation, Massachusetts. Ecol. Mono.10: 145–192. 1940.
Ellison, L. A comparison of methods of quadratting short-grass vegetation. Jour. Agr. Res.64: 595–614. 1942.
Erdmann, M. H., andHarrison, C. M. The influence of domestic ryegrass and redtop upon the growth of Kentucky bluegrass and Chewing’s fescue in lawn and turf mixtures. Tour. Am. Soc. Agron.39: 682–689. 1947.
Erickson, L. C. The effect of alfalfa seed size and depth of seeding upon the subsequent procurement of stand. Jour. Am. Soc. Agron.38: 964–973. 1946.
Evans, E. T. R., andEvans, W. C. Studies on the biochemistry of pasture plants. II. The pharmacological properties of certain pasture plant juices and their possible significance in the aetiology of some disorders of the grazing animal. Jour. Brit. Grassl. Soc.3: 249–261. 1948.
Fautin, R. W. Biotic communities of the northern desert shrub biome in western Utah. Ecol. Mono.16: 251–310. 1946.
—. Some biotic communities of the desert in western Utah. Colo.-Wyo. Acad. Sci. Jour.3: 52–53. 1948.
Fenton, E. W. The botanical survey of grasslands in the South and East of Scotland. Jour. Ecol.19: 392–409. 1931.
—. The point quadrat method. Agr. Prog.10: 238–242. 1933.
-. An apparatus for the point method of pasture analysis. Rep. 3rd Grassl. Conf. North & Cent. Eu. Countries, Zürich-Oelikon: 215–221. 1934.
Flory, E. L., andTrussell, D. F. Observation of plant competition, plant succession, plant-soil relationships, overgrazing and erosion on sagebrush areas. Soil Cons. Serv. Reg. (8) Bul. 24: Ser. 3. Mimeo. 1938.
Foures, E. W.,et al. Experiments with annual crops and permanent pastures to provide grazing for dairy cows in the sandhill region of the Southeast. U. S. Dept. Agr., Tech. Bul. 805: 1–41. 1941.
Fracker, S. B., andBrischle, H. A. Measuring the local distribution of Ribes. Ecology25: 283–303. 1944.
—,et al. Improving pastures and grasslands for the northeastern States at the United States Regional Pasture Research Laboratory. U. S. Dept. Agr., Misc. Publ. 590: 1–29. 1946.
Fraps, G. S., andFudge, J. F. Chemical composition of sixty-four species of range pasture grasses grown on a Victoria clay loam soil. Jour. Am. Soc. Agron.37: 251–258. 1945.
Frisch-Knecht, N. G., andPlummer, A. P. A simplified technique for determining herbage production on range and pasture land. Agron. Jour.41: 63–65. 1949.
Fudge, J. F., andFraps, G. S. The chemical composition of forage grasses from the Gulf coast prairie as related to soils and to requirements for range cattle. Tex. Agr. Exp. Sta., Bul.644: 1–39. 1944.
Gareer, R. J.,et al. Pastures and pasture problems in northeastern States. Pa. Agr. Exp. Sta., Bul. 485: 1–44. 1946.
Gardner, J. L., andHubbell, D. S. Some vegetational responses after eight years of protection for grazing. Ecology24: 409–410. 1943.
Garrigus, W. P., andRush, H. P. Some effects of the species and stage of maturity of plants on the forage consumption of grazing steers of various weights. Ill. Agr. Exp. Sta., Bul. 454. 1939.
Gist, G. R., andSmith, R. M. Root development of several common forage grasses to a depth of eighteen inches. Jour. Am. Soc. Agron.40: 1036–1042. 1948.
Gleason, H. A. The structure and development of the plant association. Bul. Torrey Bot. Club44: 463–481. 1917.
—. Some applications of the quadrat method. Bul. Torrey Bot. Club.47: 21–34 1920.
—. The significance of Raunkiaer’s Law of Frequency. Ecology10: 406–408. 1929.
—. The individualistic concept of the plant association. Am. Mid. Nat.21: 92–110. 1939.
Good, R. The geography of the flowering plants. 403 pp. 1947.
Graham, E. H. Natural principles of land use. 274 pp. 1944.
Hafenrichter, A. L. Getting new range plants into practise. Tour. Range Res.1: 9–18. 1948.
Hanson, H. C. A study of the vegetation of northeastern Arizona. Univ. Nebr. Stud.24: 85–175. 1924.
—. Analysis of seeding mixtures and resulting stands in irrigated pastures of northern Colorado. Jour. Am. Soc. Agron.21: 650–659. 1929.
—. Improvement of sagebrush range in Colorado. Colo. Agr. Exp. Sta., Bul.356: 1–12. 1929.
—. Intensity of grazing in relation to proximity to isolation transects. Ecology10: 343–346. 1929.
—. Factors influencing the establishment of irrigated pastures in northern Colorado. Colo. Agr. Exp. Sta., Bul.378: 1–53. 1931.
—. A comparison of methods of botanical analysis of the native prairie in western North Dakota. Jour. Agr. Res.49: 815–842. 1934.
—. Ecology of the grassland. Bot. Rev.4: 51–82. 1938.
—. The agroclimatic-analogue (homoclime) technique in plant introduction and distribution of new selections. Agron. Jour.41: 186–188. 1949.
—, andBall, W. S. An application of Raunkiaer’s Law of Frequency to grazing studies. Ecology9: 467–473. 1928.
—, andLove, L. D. Size of list quadrat for use in determining the effects of different systems of grazing uponAgropyron smithii mixed prairie. Jour. Agr. Res.41: 549–550. 1930.
—, andLove, L. D. Comparison of methods of quadratting. Ecology11: 734–748. 1930.
—,et al. Effects of different systems of grazing by cattle upon a western wheat-grass type of range. Colo. Agr. Exp. Sta., Bul.377: 1–82. 1931.
—, andWhitman, W. Plant succession on solonetz soils in western North Dakota. Ecology18: 516–522. 1937.
—, andWhitman, W. Characteristics of major grassland types in western North Dakota. Ecol. Mono.8: 57–114. 1938.
Hanson, W. R., andStoddart, L. A. Effects of grazing upon bunch wheat grass. Jour. Am. Soc. Agron.32: 278–289. 1940.
Hathaway, I. L.,et al. Carotene content of native Nebraska grasses. Nebr. Agr. Exp. Sta., Bul.140: 1–15. 1945.
Haynes, J. L. Effects of pasture practises on root distribution. Jour. Am. Soc. Agron.35: 10–18. 1943.
Hayward, C. L. Biotic communities of the Wasatch chaparral, Utah. Ecol. Mono.18: 473–506. 1948.
Holscher, C. E. The effects of clipping bluestem wheatgrass and blue grama at different heights and frequencies. Ecology26: 148–156. 1945.
Holt, E. C., andDavies, R. L. Differential response of Arlington and Norbeck bent grasses to kinds and rates of fertilizer. Tour. Am. Soc. Agron.40: 282–284. 1948.
Hormav, A. L. Getting better records of vegetation changes with the line interception method. Jour. Range Mgt.2: 67–69. 1949.
Howe, G. M. Agro-climatic analogues. Nature 4103: 983. 1948.
Huffman, C. F.,et al. Soils, crops, minerals, animals. U. S. Dept. Agr., Yearbook 1948: 81–86. 1948.
Hull, A. C. Jr., andStewart, G. Replacing cheatgrass by reseeding with perennial grass on southern Idaho ranges. Jour. Amer. Soc. Agron.40: 694–703. 1948.
Iverson, J. Biologische Pflanzentypen als Hilfsmittel in der Vegetationsforschung. 224 pp. 1936.
Jenkin, T. J. Pasture studies; some results. Univ. Col. North Wales, Bangor. 58 pp. 1919.
Johnson, L. An instrument for list charting. Ecology8: 282–283. 1927.
Johnstone-Wallace, D. B., andKennedy, K. Grazing management practises and their relationship to the behaviour and grazing habits of cattle. Jour. Agr. Sci.34: 190–197. 1944.
Joint Committee. Preliminary report on pasture investigations technique. Jour. Dairy Sci.26: 353–369. 1943.
Katz, N. J. Zur Kenntnis der Niedermoore im Norden des Moskauer Gouvernements. Rep. Spec. Nov. Reg. Veg. Beitr. z. Systematik u. Pflanzengeog. VI. 1929.
Keller, W. Designs and technic for the adaptation of controlled competition to forage plant breeding. Jour. Am. Soc. Agron.38: 580–588. 1946.
—,et al. New grass-legume pasture mixtures are high producers. Farm & Home Sci.8: 516–518. 1947.
Kenoyer, L. A. A study of Raunkiaer’s Law of Frequence. Ecology8: 341–347. 1927.
Kernohan, J. T. Grassland output on a County Down farm. Jour. Brit. Grassl. Soc.2: 73–81. 1947.
Kidder, R. W. A proposed method of measuring pasture yields with grazing cattle. Jour. An. Sci.5: 187–193. 1946.
Kincaid, C. M.,et al. Some factors that influence the production of steers from pasture. Jour. An. Sci.4: 164–173. 1945.
Klages, K. H. W. Ecological crop geography. 615 pp. 1942.
Knott, J. C.,et al. Methods of measuring pasture yields with dairy cattle. Wash. Agr. Exp. Sta., Bul. 295. 1934.
Kreizinger, E. J.,et al. Reaction of mountain brome and Canada wildrye strains to head smut (Ustilago bullata). Jour. Agr. Res.75: 105–111. 1947.
Küchler, A. W. A geographic system of vegetation. Geog. Rev.37: 233–240. 1947.
—. A new vegetation map of Manchuria. Ecology29: 513–516. 1948.
Lang, R., andBarnes, O. K. Range forage production in relation to time and frequency of harvesting. Wyo. Agr. Exp. Sta., Bul. 253. 1942.
Larson, F., andWhitman, W. A comparison of used and unused grassland mesas in the Badlands of South Dakota. Ecology23: 438–445. 1942.
Lawrence, W. E. Some ecotypic relations ofDeschampsia caespitosa. Am. Jour. Bot.32: 298–314. 1945.
Levy, E. B. The grasslands of New Zealand. N. Z. Tour. Agr.34: 147–148. 1927.
Linehan, P. A., andLowe, J. The output of pasture and its measurement. I. Jour. Brit. Grassl. Soc.1: 1–29. 1946.
—,et al. The output of pasture and its measurement. II. Jour. Brit. Grassl. Soc.2: 145–168. 1947.
Lippmaa, T. The unistratal concept of plant communities. Am. Mid. Nat.21: 110–145. 1939.
Lister, P. B., andSchumacher, F. X. The influence of rainfall upon tuft area and height growth of three semidesert range grasses in southern Arizona. Jour. Agr. Res.54: 109–121. 1937.
Lommasson, T., andJensen, C. Grass volume tables for determining range utilization. Science87: 444. 1938.
——. Determining utilization of range grasses from height-weight tables. Jour. For.41: 589–593. 1943.
Love, L. D., andHanson, H. C. Life history and habits of crested wheat grass. Jour. Agr. Res.45: 371–383. 1932.
Lueck, A. G.,et al. The effects of a companion crop and depth of planting on the establishment of smooth brome grass,Bromus inermis Leyss. Agron. Jour.41: 137–140. 1949.
McCarty, E. C. The relation of growth to the varying carbohydrate content in mountain brome. U. S. Dept. Agr., Tech. Bul.598: 1–24. 1938.
-, andPrice, R. Growth and carbohydrate content of important mountain forage plants in central Utah as affected by clipping and grazing. U. S. Dept. Agr., Tech. Bul. 818. 1942.
McGinnies, W. G. The quadrat. Jour. For.28: 23–27. 1930.
—. The relation between frequency index and abundance as applied to plant populations in a semi-arid region. Ecology15: 263–282. 1934.
McHenry, J. R., andNewell, L. C. Influence of some perennial grasses on the organic matter content and structure of an eastern Nebraska fine-textured soil. Jour. Am. Soc. Agron.39: 981–994. 1947.
——. Residual effect of some perennial grasses on the structure of an eastern Nebraska fine-textured soil. Jour. Am. Soc. Agron.41: 76–78. 1949.
McMillen, W. N.,et al. Chemical composition, grazing value and vegetative changes of herbage in a typical plains pasture. Jour. An. Sci.3: 237–243. 1943.
Malmsten, H. E. Combination of list and chart quadrat methods for grazing studies. Ecology11: 749–751. 1930.
Maximov, N. A. Physiologisch-ökologische Untersuchungen über die Dürrerisistenz der Xerophyten. Jahrb. Wiss. Bot.62. 1923.
-. The plant in relation to water. 451 pp. 1929.
Moore, R. M.,et al. Grazing management: continuous and rotational grazing by Merino sheep. Austral. Counc. Sci. & Ind. Res., Bul.201: 1–104. 1946.
Morgan, A., andBeruldsen, E. T. Sampling technique as applied to irrigated pasture in regard to botanical composition and carrying capacity under different grazing systems. Jour. Agr., Victoria, Austral.29: 36–45. 1931.
Moss, E. H., andCampbell, J. A. Fescue grassland of Alberta. Canad. Jour. Res., C.,25: 209–227. 1947.
Moxon, A. L.,et al. Growth of steers on seleniferous range. Jour. An. Sci.3: 299–309. 1944.
Muir, W. R. Pasture herbage as a causal factor in animal disease: a review. Jour. Brit. Grassl. Soc.3: 229–247. 1948.
Muller, C. H. Vegetation and climate of Coahuila, Mexico. Madroño9: 33–57. 1947.
Murphy, R. P., andArny, A. C. The emergence of grass and legume seedlings planted at different depths in five soil types. Jour. Am. Soc. Agron.31: 17–28. 1939.
Murray, S. M., andGlover, P. Some practical points regarding the detailed botanical analysis of grass-veld or other pastures by the list quadrat method. Jour. Ecol.23: 536–539. 1935.
Musser, H. B. Effects of soil acidity and available phosphorus on population changes in mixed Kentucky bluegrass-bent turf. Tour. Am. Soc. Agron.40: 614–620. 1948.
Nelson, E. W. The influence of precipitation and grazing upon black grama grass range. U. S. Dept. Agr., Tech. Bul. 409. 1934.
Nevens, W. B. A comparison of sampling procedures in making pasture yield determinations. Jour. Dairy Sci.28: 171–185. 1945.
Nichols, G. E. Methods in the floristic study of vegetation. Ecology11: 127–135. 1930.
Norhagen, R. Die Vegetation und Flora des Sylenegebietes. 1927.
Nowosad, F. S., andStevenson, T. M. The relative value of certain grass-legume mixtures for hay and pasture in short-term rotations. Sci. Agr.27: 86–96. 1947.
Nuttonson, M. Y. Agroclimatology and crop ecology of the Ukraine and climatic analogues in North America. Geog. Rev.37: 216–232. 1947.
Olmsted, C. E. Growth and development in range grasses. V. Photoperiodic responses of clonal divisions of three latitudinal strains of side-oats grama. Bot. Gaz.106: 382–401. 1945.
Orr, J. B. Minerals in pasture and their relation to animal nutrition. 150 pp. 1929.
Ostvald, H. Die Vegetation des Hochmoores Komosse. 436 pp. 1923.
Parker, K. W., andSavage, D. A. Reliability of the line interception method in measuring vegetation on the southern Great Plains. Jour. Am. Soc. Agron.36: 97–110. 1944.
Patton, A. R., andGieseker, L. Seasonal changes in the lignin and cellulose content of some Montana grasses. Jour. An. Sci.1: 22–26. 1942.
Pavlychenko, T. K. Quantitative study of the entire root system of weed and crop plants under field conditions. Ecology18: 62–79. 1937.
—. The soil-block washing method in quantitative root study. Canad. Jour. Res., C.,15: 33–57. 1937.
Pearse, K. An area-list method of measuring range plant populations. Ecology16: 573–579. 1935.
Pechanec, J. F. Comments on the stem-count method of determining the percentage utilization of ranges. Ecology17: 329–331. 1936.
— Sampling errors in range surveys of sagebrush-grass vegetation. Jour. For.39: 52–54. 1941.
—, andPickford, G. D. A weight-estimate method for the determination of range or pasture production. Jour. Am. Soc. Agron.29: 894–904. 1937.
Penfound, W. T. A study of phytosociological relationships by means of aggregations of colored cards. Ecology26: 38–57. 1945.
—. A phytosociological analysis of a goldenrod community near Kenner, Louisiana. Ecology29: 124–125. 1948.
—, andHoward, J. A. A phytosociological analysis of an evergreen oak forest in the vicinity of New Orleans, Louisiana. Am. Mid. Nat.23: 165–174. 1940.
Peterson, M. L., andLoomis, W. E. Effects of photoperiod and temperature on growth and flowering of Kentucky bluegrass. Pl. Phys.24: 31–43. 1949.
Pidgeon, I. M., andAshby, E. A new quantitative method of analysis of plant communities. Austral. Jour. Sci.5: 19–21. 1942.
Pinck, L. A., andAllison, F. E. The effect of nitrogen application upon the weight and nitrogen content of the roots of Sudan grass. Jour. Am. Soc. Agron.39: 634–637. 1947.
Plummer, A. P. The germination and early seedling development of 12 range grasses. Jour. Am. Soc. Agron.35: 19–33. 1943.
Pollitt, R. The effect of age on the yielding capacity of leys cropped for grass drying. Jour. Brit. Grassl. Soc.2: 119–126. 1947.
Pòlya, G. Sur quelques points de la théorie des probabilités. Ann. Inst. Henri Poincaré1: 117–162. 1931.
Pound, R., andClements, F. E. Phytogeography of Nebraska. 442 pp. 1898
Prát, S. [M-concentration as a general biological problem]. Sbor, Ceské Akad. Zem.18: 1–7. 1944.
Preston, F. W. The commonness and rarity of species. Ecology29: 254–283. 1948.
Ramaley, F. Xerophytic grasslands at different altitudes in Colorado. Bul. Torrey Bot. Club46: 37–52. 1919.
—. Vegetation of the San Luis Valley in southern Colorado. Univ. Colo. Stud., D,1: 231–277. 1942.
Ramenskij, L. G. Zur Methodik der vergleichenden Bearbeitung und Ordnung von Pflanzenlisten. Beitr. Biol. Pflanz. 18. 1930.
Raunkiaer, C. Formationsundersögelse og Formationstatistik. Bot. Tidskr.30: 20–80. 1909.
-. Recherches statistiques sur les formations végétales. Kgl. Danske Vidensk. Selskab. Biol. Meddel. i. 3. 1918.
-. The life-forms of plants and statistical plant geography, being collected papers of C. Raunkiaer. 632 pp. 1934.
Raymond, W. F. Evaluation of herbage for grazing. Nature161: 937–938. 1948.
Reid, E. H., andPickford, G. D. A comparison of the ocularestimate-by-plot and the stubble-height methods of determining percentage utilization of range grasses. Jour. For.39: 935–941. 1941.
——. An appraisal of range survey methods. Jour. For.42: 471–479. 1944.
——. Judging mountain meadow-range condition in eastern Oregon and eastern Washington. U. S. Dept. Agr., Circ.748: 1–31. 1946.
Rhoad, A. O., andCarr, R. B. Measuring production capacity of pastures through maintenance studies with mature steers. U. S. Dept. Agr., Tech. Bul.890: 1–20. 1945.
Robertson, J. H. A quantitative study of true-prairie vegetation after three years of extreme drought. Ecol. Mono.9: 431–492. 1939.
—. Responses of range grasses to different intensities of competition with sagebrush (Artemisia tridentata Nutt.). Ecology28: 1–16. 1947.
—, andPearse, C. K. Artificial reseeding and the closed community. Northwest Sci.19: 58–66. 1945.
Roe, R. Preliminary survey of the natural pastures of the New England District of New South Wales and a general discussion of their problems. Austral. Council Sci. & Ind. Res., Bul.210: 1–26. 1947.
Rogler, G. A. Cultivated grasses for pastures. U. S. Dept. Agr., Yearbook 1948: 491–495. 1948.
Romell, L. G. Comments on Raunkiaer’s and similar methods of vegetation analysis and the law of frequency. Ecology11: 589–596. 1930.
Rubel, E. Geobotanische Untersuchungsmethoden. 290 pp. 1922.
—. The present state of geobotanical research in Switzerland. In Proc. Int. Cong. Pl. Sci., Ithaca, Vol.1: 603–621. 1929.
Salisbury, E. J. The standardization of descriptions of plant communities. Jour. Ecol.19: 177–189. 1931.
Sampson, A. W. Range and pasture management. 421 pp. 1923.
-, andMalmsten, H. E. Grazing periods and forage production on the national forests. U. S. Dept. Agr., Bul. 1405. 1926.
Sarvis, J. T. Composition and density of the native vegetation in the vicinity of the Northern Great Plains Field Station. Tour. Agr. Res.19: 63–72. 1920.
-. Grazing investigations on the northern Great Plains. N. D. Agr. Exp. Sta., Bul. 308. 1941.
Savage, D. A. The line-transect method, an improved method of studying native range vegetation. U. S. Dept. Agr., Mimeo. 1940.
—, andHeller, V. G. Nutritional qualities of range forage plants in relation to grazing with beef cattle on the southern plains experimental range. U. S. Dept. Agr., Tech. Bul.943: 1–61. 1947.
Shantz, H. L. A study of the vegetation of the mesa region east of Pike’s Peak: theBouteloua formation. Bot. Gaz.42: 16–47. 1906.
—, andPiemeisel, R. L. Fungus fairy rings in eastern Colorado and their effect on vegetation. Jour. Agr. Res.11: 191–246. 1917.
Shoemaker, D. A. A proposed revision of standards for determining density of herbaceous plant cover. Jour. For.30: 1012–1013. 1932.
Short, L. R. Reseeding to increase the yield of Montana range lands. U. S. Dept. Agr., Farm. Bul. 1924: 1–26. 1943.
Shreve, F. The edge of the desert. Asso. Pac. Coast Geog., Yearbook6: 6–11. 1940.
Smith, A. D. A study of the reliability of range vegetation estimates. Ecology25: 441–448. 1944.
Sprague, H. B. Root development of perennial grasses and its relation to soil conditions. Soil Sci.36: 189–209. 1933.
—, andMyers, W. M. A comparative study of methods for determining yields of Kentucky blue grass and white clover when grown in association. Jour. Am. Soc. Agron.37: 370–377. 1945.
Stapledon, R. G. Pasture problems: drought resistance. Jour. Agr. Sci.5: 129–151. 1912.
—. The precise value and application of the Aberystwyth and other strains of herbage plants. Jour. Brit. Grassl. Soc.2: 113–118. 1947.
-, andDavies, W. The grassland map of England and Wales. Jour. Min. Agr.48: 1941.
—, andJones, M. G. The sheep as a grazing animal and as an instrument for estimating the productivity of pastures. Welsh PL Breed. Sta., H, No.5: 42–54. 1927.
—, andWheeler, D. E. An experiment to test the influence of date and depth of sowing on four of the chief grasses and on white clover. Jour. Brit. Grassl. Soc.3: 263–272. 1948.
Stebler, F. G., andSchröter, C. Versuch einer Übersicht über die Wiesentypen der Schweitz. Landwirt. Jahrb. Schweitz. 6. 1892.
Steiger, T. L. Structure of prairie vegetation. Ecology11: 170–217. 1930.
Stewart, G.,et al. Influence of unrestricted grazing on northern salt desert plant associations in western Utah. Jour. Agr. Res.69: 289–316. 1940.
—, andHull, A. C. Cheatgrass (Bromus tectorum L.) -an ecologic intruder in southern Idaho. Ecology30: 58–74. 1949.
—, andHutchings, S. S. The point-observation-plot (square-foot density) method of vegetation survey. Tour. Am. Soc. Agron.28: 714–722. 1936.
Stoddart, L. A. The palouse grassland association in northern Utah. Ecology22: 158–163. 1941.
-. Range land of America and some research on its management. Fourth Ann. Fac. Res. Lect., Utah State Agr. Col. 32 pp. 1945.
—. Some physical and chemical responses ofAgropyron spicatum to herbage removal at various seasons. Utah Agr. Exp. Sta., Bul.324: 1–24. 1946.
—. Seeding arid ranges to grass with special reference to precipitation. Utah Agr. Exp. Sta., Circ.122: 1–29. 1946.
-, andSmith, A. D. Range management. 547 pp. 1943.
Stoeckeler, J. H., andKluender, W. A. The hydraulic method of excavating root systems of plants. Ecology19: 355–369. 1938.
Sullivan, J. T., andGarber, R. J. Chemical composition of pasture plants, with some reference to the dietary needs of grazing animals. Pa. Agr. Exp. Sta., Bul.489: 1–61. 1947.
Talbot, M. W. Indicators of southwestern range conditions. U. S. Dept. Agr., Farm. Bul. 1782. 1937.
Tansley, A. G., andChipp, T. F. Aims and methods in the study of vegetation. 383 pp. 1926.
Tharp, B. C., andMuller, C. H. A rapid method for excavating root systems of native plants. Ecology21: 347–350. 1940.
—. The mesa region of Texas: an ecological study. Texas Acad. Sci., Proc. & Trans.27: 81–91. 1944.
Thomson, J. W. Relic prairie areas in central Wisconsin. Ecol. Mono.10: 685–717. 1940.
Tinney, F. W.,et al. Preliminary report of a study of methods used in botanical analyses of pasture swards. Jour. Am. Soc. Agron.29: 835–840. 1937.
Tisdale, E. W. The grasslands of the northern interior of British Columbia. Ecology28: 346–382. 1947.
Transeau, E. N. The prairie peninsula. Ecology16: 423–437. 1935.
Van Dersal, W. R. The ecology of a lawn. Ecology17: 515–527. 1936.
Van Horn, A. G., andDawson, J. R. Improvement of pastures for dairy cattle in Middle Tennessee. U. S. Dept. Agr., Circ.786: 1–21. 1948.
Vestal, A. G. Unequal scales for rating species in communities. Am. Jour. Bot.30: 305–310. 1943.
—, andHeermans, M. F. Size requirements for reference areas in mixed forest. Ecology26: 122–134. 1945.
Watkins, W. E. Nonprotein and carotene as an index of plant activity in range forage. Jour. Agr. Res.75: 63–69. 1947.
Watson, J. A. S. Science and the farmer. Jour. Min. Agr.,54: 1–9. 1947.
Watt, A. S. Pattern and process in the plant community. Jour. Ecol.35: 1–22. 1947.
Weaver, J. E. A study of the root systems of prairie plants of southeastern Washington. Pl. World18: 227–248, 273–292. 1915.
-. A study of the vegetation of southeastern Washington and adjacent Idaho. Univ. Nebr. Stud.17: 1917.
-. The ecological relations of roots. Carnegie Inst. Wash., Publ. 286. 128 pp. 1919.
-. Root development in the grassland formation. Carnegie Inst. Wash., Publ. 292. 151 pp. 1920.
—. Investigations on the root habits of plants. Am. Tour. Bot.12: 502–509. 1925.
-. Root development of field crops. 290 pp. 1926.
—, andAlbertson, F. W. Resurvey of grasses, forbs, and underground plant parts at the end of the great drought. Ecol. Mono.13: 63–117. 1943.
——. Nature and degree of recovery of grassland from the great drought of 1933 to 1944. Ecol. Mono.14: 393–479. 1944.
—, andBruner, W. E. Prairies and pastures of the dissected loess plains of central Nebraska. Ecol. Mono.18: 507–549. 1948.
-, andClements, F. E. Plant ecology. 2nd Ed. 601 pp. 1938.
—, andDarland, R. W. Grassland patterns in 1940. Ecology25: 202–215. 1944.
——. A method of measuring vigor in range grasses. Ecology28: 146–162. 1947.
——. Changes in vegetation and production of forage resulting from grazing lowland prairie. Ecology29: 1–29. 1948.
—, andFitzpatrick, T. J. The prairie. Ecol. Mono.4: 109–295. 1934.
—, andHougen, V. H. Effect of frequent clipping on plant production in prairie and pasture. Am. Mid. Nat.21: 396–414. 1939.
—,et al. Changes in true-prairie vegetation during a drought determined by list quadrats. Ecology21: 357–362. 1940.
Webster, C. B. Meritorious crop in war or peace, Rescue grass. So. Seedsman7: 11, 51. 1944.
Welch, J. S. The management of irrigated pastures. Idaho Agr. Exp. Sta., Bul. 95. 1917.
West, C.,et al. Methods and significant relations in the quantitative analysis of plant growth. New Phyt.19: 200–207. 1920.
West, O. An investigation of the methods of botanical analysis of pasture. So. Afr. Jour. Sci.33: 501–559. 1937.
Westhoff, V. The vegetation of dunes and salt marshes on the Dutch islands of Terschelling, Vlieland, and Teal. 131 pp. 1947.
Whitman, W.,et al. Pasture grasses and pasture mixtures for eastern North Dakota. N. D. Agr. Exp. Sta., Bul.327: 1–24. 1943.
—, andHanson, H. C. Vegetation on scoria and clay buttes in western North Dakota. Ecology20: 455–457. 1939.
—,et al. Relation of drouth and grazing to North Dakota range lands. N. D. Agr. Exp. Sta., Bul.320: 1–29. 1943.
-,et al. Natural revegetation of abandoned fields in western North Dakota. N. D. Agr. Exp. Sta., Bul. 321. 1943.
Williams, C. B. Some applications of the logarithmic series and index of diversity to ecological problems. Jour. Ecol.32: 1–44. 1944.
Wilsie, C. P., andSkory, J. Self-fertility of erect and pasture-type alfalfa clones as related to the vigor and fertility of their inbred and outcrossed progenies. Jour. Am. Soc. Agron.40: 786–794. 1948.
Woodward, T. E. The quantities of grass that dairy cattle will graze. Jour. Dairy Sci.19: 347–357. 1936.
Wright, J. C., andWright, E. A. Grassland types of south central Montana. Ecology29: 449–460. 1948.
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Supplement to article in The Botanical Review4: 51–82. 1938.
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Hanson, H.C. Ecology of the grassland. II. Bot. Rev 16, 283–360 (1950). https://doi.org/10.1007/BF02869990
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DOI: https://doi.org/10.1007/BF02869990