1. Primary production and soil relations in an Illinois sand prairie;Baier;Am. Midl. Nat.,1972
2. Soil Factors related to Growth and Yield of Slash Pine Plantations;Barnes;Fla. Agric. Exp. Stn. Tech. Bull.,1955
3. Seasonal Development and Yield of Native Plants on the Upper Snake River Plains and Their Relation to Certain Climatic Factors;Blaisdell;U.S. Dept. Agric. Tech. Bull.,1958
4. Directions for making mechanical analysis of soils by the hydrometer method;Bouyoucos;Soil Sci.,1963
5. The Nature and Properties of Soils;Buckman,1969