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كتب علوم طبيعية

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• Virginia's soils and land useAlfred Lawrence Wingo
• Irrigation for the farm, garden, and orchardHenry Stewart
• Moisture requirements in agriculture : farm irrigationHarry Burgess Roe
• Irrigation farming : a handbook for the practical application of water in the production of cropsLucius Merle Wilcox
• If the well runs dry; a new southern High plains farm enterprise and its effect on the ground-water supplyUnited States. Bureau of Agricultural Economics
• The cost of soil erosion, with control suggestionsHugh Hammond Bennett
• Soil conservation, by Hugh Hammond BennettHugh H. Bennett
• Soil erosion control; a practical exposition of the new science of soil conservation for students, farmers, and the general publicAustin Earle Burges
• Vanishing lands; a world survey of soil erosionG. V Jacks
• Man and the soil : a brief introduction to the study of soil conservationKarl B Mickey
• Report on activities of the Conservation section, Division of agricultural cooperation, Pan American union (1943-1946)Pan American Union. Division of Agricultural Cooperation
• Hands to save the soilCivilian Conservation Corps
• Soil-erosion program. Hearing[s] before a subcommittee of the Committee on the public lands, House of representatives, Seventy-fourth CongreUnited States. Congress. House. Committee on Public Lands
• Protection of land resources against soil erosion. Hearings before a subcommittee of the Committee on agriculture and forestry, United StateUnited States. Congress. Senate. Committee on Agriculture and Forestry
• Conservation practices for the range lands of the southern Great Plains. Soil conservation service, U.S. Department of AgricultureJack Steward McCorkle
• Toward meeting soil and water conservation research needsUnited States. Agricultural Research Service
• Elements of soil conservationHugh Hammond Bennett
• Saving Georgia soilsUnited States. Soil Conservation Service
• Conserving our soil and water resourcesMaryland. State Soil Conservation Committee
• Soil fertility and fertilizersJames Edward Halligan
• Soil fertility and permanent agricultureCyril G. Hopkins
• Modern high farming. A treatise on soils, plants, and manuresFrancis Wyatt
• Research contributes to more efficient use of fertilizers; a report of progress of the TVA Soils and Fertilizer Research BranchTennessee Valley Authority. Division of Agricultural Relations
• On the use of lime in agricultureJas. F. W. Johnston
• The physical action of lime on clay soils ...Robert Mifflin Snyder
• Manual on phosphates in agriculture; general information for fertilizer salesman, county agent, agricultural teacher, farmer and fertilizer Vincent Sauchelli
• The book of farm implements & machinesJames Slight
• Exploring for plantsDavid Fairchild
• Hortus : a concise dictionary of gardening, general horticulture and cultivated plants in North AmericaL. H. Bailey
• Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, L. H. Bailey
• Henderson's Handbook of plants and general horticulture.Peter Henderson
• The gardeners dictionary. Containing the methods of cultivating and improving all sorts of trees, plants, and flowers, for the kitchen, fruiPhilip Miller
• The American gardener : or, A treatise on the situation, soil, fencing and laying-out of gardens; on the making and managing of hot-beds andWilliam Cobbett
• Crop management and soil conservationJoseph Frank Cox
• The useful plants of the worldWillard Nelson Clute
• Agricultural botanyWilliam Darlington
• Textbook of pastoral and agricultural botany, for the study of the injurious and useful plants of country and farmJohn W. Harshberger
• The botany of crop plants; a text and reference book, by Wilfred W. RobbinsWilfred William Robbins
• The botany of crop plantsWilfred William Robbins
• Sturtevant's notes on edible plantsE. Lewis Sturtevant
• Useful plants of the futureGeorge L. Goodale
• Resources of the southern fields and forestsFrancis Peyre Porcher
• Directions for bringing over seeds and plants, from the East-Indies and other distant countries, in a state of vegetation: together with a cJohn Ellis
• The tropical crops; a popular treatment of the practice of agriculture in tropical regionsO. W. Barrett
• Practical lessons in tropical agricultureRobert Lemuel Clute
• Agriculture in the tropics; an elementary treatiseJ. C. Willis
• Irrigated soils; their fertility and managementD. W. Thorne
• Propagation of plants; A complete guide for professional and amateur growers of plants by seeds, layers, grafting and budding, with chaptersM. G. Kains
• Sketch of the evolution of our native fruitsL. H. Bailey
• How nature makes plants to our order; a monograph by Luther Burbank; illustrated with eight direct color photograph prints taken on Mr. BurbLuther Burbank
• How plants are trained to work for manLuther Burbank
• Breeding crop plants, by Herbert Kendall Hayes and Ralph John GarberHerbert Kendall Hayes
• Southern field crops [exclusive of forage plants] by John Frederick DuggarJ. F. Duggar
• Southern field cropsJ. F. Duggar
• The vegetation-reproduction relationship in crop plants as affected by certain factorsNicholas Albert Pettinger
• Corn plantsFrederick Leroy Sargent
• Barley-climate relationships and the use of phenology in ascertaining the thermal and photo-thermal requirements of barley. Based on data ofM. Y. Nuttonson
• Races of maize in Peru, their origins, evolution and classification [by] Alexander Grobman, Wilfredo Salhuana and Ricardo Sevilla, in collabAlexander Grobman
• Rye-climate relationships and the use of phenology in ascertaining the thermal and photo-thermal requirements of ryeM. Y. Nuttonson
• The effect of varying hydrogen-ion concentration on the growth of wheat seedlings in culture soils and solutions, by Theodore Clinton McIlvaT. C. McIlvaine