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كتب علوم طبيعية

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• Agricultural production functionsEarl O. Heady
• Farm managementGeorge F. Warren
• Observations on laying out farms, in the Scotch style, adapted to England : comprising an account of the introduction of the Berwickshire huJ. C. Loudon
• Rural economy, in its relations with chemistry, physics, and meteorologyJ. B. Boussingault
• Chemistry in agriculture, a coöperative work intended to give examples of the contributions made to agriculture by chemistryJoseph S. 1870-1953 Chamberlain
• Agricultural chemistry, a reference textDonald E. H. Frear
• The farm chemurgicWilliam J. Hale
• Handbook of agricultural chemicalsLester William Hanna
• How crops growSamuel W. Johnson
• Lectures on the applications of chemistry and geology to agricultureJas. F. W. Johnston
• Lectures to farmers on agricultural chemistry, introductory to the writings of LiebigAlexander Petzholdt
• The Bureau of Chemistry and Soils; its history, activities and organization, by Gustavus A. WeberGustavus Adolphus Weber
• Official and provisional methods of analysis, Association of Official Agricultural ChemistsAssociation of Official Analytical Chemists. Committee on Revision of Methods
• Experimental agriculture; being the results of past, and suggestions for future experiments in scientific and practical agriculture, by JameJas. F. W. Johnston
• Principles and practice of agricultural analysis. A manual for the estimation of soils, fertilizers, and agricultural products. For the use Harvey Washington Wiley
• Principles and practice of agricultural analysis; a manual for the study of soils, fertilizers, and agricultural products; for the use of anHarvey Washington Wiley
• Abstracts of the proceedings of the first International congress of soil scienceD.C.) International Congress of Soil Science 1927 : Washington
• Soil survey manualUnited States. Soil Conservation Service
• Established and tentative soil series of the United StatesUnited States. Soil Conservation Service
• Soil classification : a comprehensive systemUnited States. Soil Conservation Service
• Soil managementFirman E. Bear
• Soils and soil managementA. F. Gustafson
• Using and managing soilsA. F. Gustafson
• Cation exchange in soilsW. P. Kelley
• Soil managementF. H. King
• Soils and soil managementC. E. Millar
• Soils, their physics and chemistryAmar Nath Puri
• The chemistry of soils and fertilizersHarry Snyder
• Soils and fertilizersHarry Snyder
• Soil and civilization; a modern concept of the soil and the historical development of agricultureMilton Whitney
• Soil physicsL. D. Baver
• A manual of soil physicsPercy Bousfield Barker
• The extraction and saturation of soils with volatile antisepticsJohannes Petrus du Buisson
• The soil solution, the nutrient medium for plant growthFrank K. Cameron
• A comparative study of the effect of cumarin and vanillin on wheat grown in soilJehiel Davidson
• Hydrogen-ion concentration studies of Minnesota soilsE. A. Fieger
• Soil chemical analysisMarion Leroy Jackson
• Instruction for the analysis of soilsJas. F. W. Johnston
• The organic matter of the soil: a study of the nitrogen distribution in different soil types ...Clarence Austin Morrow
• Are soils mapped under a given type name by the Bureau of soils method closely similar to one another?Robert Larimore Pendleton
• Decay and soil toxinsGeorge Burton Rigg
• Analysis of soils and plants for foresters and horticulturistsS. A. Wilde
• Effects of variations in moisture content on certain properties of a soil and on the growth of wheatFranklin Stewart Harris
• Studies in the drying of soilsMillard Alschuler Kein
• Freezing points of soils at the moisture equivalentReuben Marion Pinckney
• Measurement of the surface forces in soilsCharles Albert Shull
• Conditions in soils of the arid regionMilton Whitney
• The measurement and interpretation of the water-supplying power of the soil with special reference to lawn grasses and some other plantsJames Dean Wilson
• Forest soilsH. J. Lutz
• The bacteria of Nebraska soilJohn Jacob Putnam
• The soils of St. Mary's County, Md. showing the relationships of the geology to the soilsJay A. Bonsteel
• Soils and land of MichiganJ. O. Veatch
• Some characteristics and criteria of the soils of the red drift of MinnesotaGeoffrey Baldwin Bodman
• Parallelism of the soils developed on the gray drifts of MinnesotaClayton Ord Rost
• Report of the North Carolina geological survey : agriculture of the eastern counties : together with descriptions of the fossils of the marlNorth Carolina. State Geologist
• Studies on weathering and soil formation in tropical high altitudesM. W Senstius
• The soils and agriculture of the southern statesHugh Hammond Bennett
• The origin, distribution, and airphoto identification of United States soilsD. S Jenkins
• Soils of the north central region of the United States. : Agricultural Experiment Stations of Illinois [and others] and the U. S. Dept. of AUniversity of Wisconsin--Madison. Agricultural Experiment Station
• The major soil divisions of the United States; a pedologic-geographic surveyLouis Albert Wolfanger