[1] Unknown source, using data given by Beeson in USDA Misc. Pub. 369, authored by Morrison in the 91st edition of Feeds and Feeding, and by Lowe in a Special USDA report.

[2] Farm chemicals handbook. Meister Publishing Co.

[3] The importance of organic matter to soil fertility and crop health.

[4] The e?ect of soils and fertilizers on the nutritional quality of plants. USDA Agriculture Information Bulletin #299, 1965.

[5] Fast compost without manure!, in "the best gardening ideas for the ’80s". Rodale Press. 1980.

[6] N-?xing bacterial inoculation after planting. HortIdeas, 1987. vol 4, p. 126.

[7] Not all composts are created equal. HortIdeas, 1987. vol 4, p. 81.

[8] For less toxic potatoes, add molybdenum. HortIdeas, 1988. vol 5, p. 103.

[9] Heavy metal comtaminants in paper used as mulch. HortIdeas, 1988. vol 5, p. 61.

[10] High nitrates in winter-grown greens. HortIdeas, 1988. vol 5, p. 138.

[11] What’s so great about kelp. HortIdeas, 1988. vol 5, p. 64.

[12] ’sour’ mulch problems. HortIdeas, 1989. vol 6, p. 20.

[13] Watery compost extract as a fungicide. HortIdeas, 1989. vol 6, p. 30.

[14] Agri-Sul Co. The Role of Elemental Sulphur in Agriculture.

[15] F. E. Allison. Soil Organic Matter and Its Roll in Crop Production. Elsevier, 1973. One of the more modern general books on organic matter, with useful insights but a cavalier attitude toward the value of organic matter.

[16] J. W. Rouatt & R. G. Atkinson. The e?ect of the incorporation of certain cover crops on the microbiological balance of potato scab infested soil. Canadian Journal of Research, 28:140–152, 1950.

[17] Y. Chen & Y. Avnimelech. The Role of Organic Matter in Modern Agriculture. Martinus Hijho?, 1986.

[18] C. S. Baldwin. A barnyard manure story; a summary of 20 years research. Technical report, Ridgetown College of Agricultural Technology.

[19] F. E. Bear. Soils and Fertilizers. Wiley, 1947.

[20] C. A. Black. private correspondence.

[21] N. C. Brady. The Nature and Properties of Soils, Macmillan. Macmillan, 1974. The traditional choice for a general, college-level text, at least in the Northeastern U.S.

[22] H. D. Chapmen. Diagnotic Criteria For Plants And Soil. University of California Press, 1965.

[23] N. F. Childers, editor. Mineral Nutrition of Fruit Crops. Rutgers University, 1954.

[24] E. Coleman. The use of ground rock powders in agriculture. Small Farm Research Association; accessible as a pdf file at

[25] R. L. Cook. Soil Management For Conservation And Production. Wiley, 1962.

[26] G. W. Cooke. The Control of Soil Fertility. Hafner, 1967.

[27] E. R. Curl. Control of plant diseases by crop rotation. The Botanical Review, 29:413–479, 1963.

[28] G. C. Papavizas & C. B. Davey. Rhizoctonia disease of bean as a?ected by decomposing green plant materials and associated micro?oras. Phytopathology, 50:516–522, 1960.

[29] G. R. Davies. The Value of Ground Rock Phosphate as a Fertilizer. Ministry of Agriculture, Fisheries and Food (Gt. Brit). a.d.a.s paper #8 edition.

[30] R.C. Dinauer, editor. Changing Patterns in Fertilizer Use. Soil Science Society of America, 1968.

[31] F.E. Khasawneh & E.C. Doll. Phosphate rock in soils. Advances in Agronomy, 30:200–202, 1979.

[32] J. E. English and D. M. Maynard. A key to nutrient disorders of vegetable plants. HortScience, 13:28, 1978.

[33] M. E. Ensminger. The Stockman's Handbook. Interstate Printers and publishers, 1970

[34] G. Tamaki et al. The in?uence of perennial weeds on the abundance of the redbacked cutworm on asparagus. Environmental Entomology, 4:274–276, 1975.

[35] H. A. J. Hoitink et al. Composted bark controls soil pathogens of plants. Ohio Report (Ohio Agric. Res. & Devel. Centre), pages 7–10, January - February 1982.

[36] J. Ryan et al. The e?ect of interrow plant cover on populations of the cabbage root ?y, delia brassicae (wiedemann). Journal of Applied Ecology, 17:31–40, 1980.

[37] V. W. L. Jordan et al. In?uence of organic soil amendments on verticillium dahliae and on the microbial composition of the strawberry rhizosphere. Annals of Applied Biology, 70:139–148, 1972.

[38] L. B. Fenn. Substitution of ammonium and potassium for added calcium in reduction of ammonia loss from surface-applied urea. Soil Science Society of America Journal, 46:771, 1982.

[39] K. W. Foreman. A visual guide to soil de?ciencies. Organic Gardening, July 1984.

[40] M. Fukuoka. The One-Straw Revolution. Rodale Press, 1978. Noted that the spiders disappeared from his ?eld after he added wood ashes; p. 28.

[41] C. G. Golueke. Composting; a Study of the Process and its Principles. Rodale Press, 1972.

[42] C.G. Golueke and P.H. McGauley. Reclamation of municipal refuse by composting. Technical Report Technical Bulletin #9, Sanitation Engineering Research Laboratory, University of California, Berkeley, 1953.

[43] A. B. Gri?ths. A Treatise On Manures. Whittaker & Co., 1900.

[44] A. Gustafson. Using and Managing Soils. McGraw-Hill, 1948.

[45] B.D. Pettersson & W. Schaumann H.H. Koepf. Bio-Dynamic Agriculture. The Anthroposophic Press, Spring Valley, NY, 1976.

[46] C. G. Hopkins. Soil Fertility and Permanent Agriculture. Ginn & Co, 1910.

[47] A. J. Maclean & F. R. Hore. Manures and compost. Technical report, Information Services, Agriculture Canada.

[48] A. Howard. The manufacture of humus by the indore process. Journal of Royal Society of Arts, 84:25, 1935.

[49] M. Schnitzler & S. O. Khan. Soil Organic Matter. Elsevier, 1978.

[50] K. Mengel & E.A. Kirkby. Principles of Plant Nutrition. International Potash Institute, P.O. Box, CH-3048 Worblaufen-Bern/Switzerland, 1979. Excellent but may be too technical for the casual reader.

[51] J. E. Knott. Handbook For Vegetable Growers. Wiley, 1962.

[52] K. Leius. In?uence of wild ?owers on parasitism of tent caterpillar and codling moth. The Canadian Entomologist, 99:444–446, 1967.

[53] M. L. Linder. Nutritional Biochemistry and Metabolism. Elsevier, 1984.

[54] J. W. Oswald & O. A. Lorenz. Soybeans as a green manure crop for the prevention of potato scab. Phytopathology, 46:22, 1956.

[55] L. Mercia. Pound for pound. New England Farmer, October 1980.

[56] P. M. Miller. Reducing ?eld populations of several plant-parasitic nematodes by leaf mold composts and some othe additives. Plant Disease Reporter, 61:328–331, 1977.

[57] J. J. Mortvedt and R. C. Dinauer, editors. Micronutrients In Agriculture. Soil Science Society of America, 1972.

[58] J. L. Mount. The Food and Health of Western Man. Charles Knight & Co., 1975.

[59] F. E. Allison & R. M. Murphy. Comparative rates of decomposition in soil of wood and bark particles of several hardwood species. Soil Science Society Proceedings, 26:463–466, 1962.

[60] Gary Nault (Ohio DEP). Private communication.

[61] S. Tisdale & W. Nelson. Soil Fertility and Fertilizers. Macmillan, 1975.

[62] D. Newcomb. Tx For Your Vegetable Garden. J. P. Tarcher, 1982.

[63] F. J. Nisbet. Sources of compost. Country Journal, 1979.

[64] Eileen Liddy (Universiy of Maine). private correspondence.

[65] S. Perrenoud. Potassium and plant health. Technical report, International Potash Institute.

[66] R. M. Perrin & M. L. Phillips. Some e?ects of mixed cropping on the population dynamics of insect pests. Environmental Entomology, 24:585–593, 1978.

[67] A. J. Pieters. Green Manuring; Principles and Practices. Wiley, 1927.

[68] D. Pimental. Handbook of Energy Utilization in Agriculture. CRC Press, 1980.

[69] R. H. Follet, L. S. Murphy & R. L. Donahue. Fertilizers and Soil Amendments. Prentice-Hall, 1981.

[70] I. P. Roberts. The Fertility of The Land. Macmillan, 1906.

[71] J. I. Rodale. Encyclopedia of Organic Gardening. Rodale Press, 1975.

[72] J. D. Romaine. Consider Plant Food Content of Your Crops. American Potash Institute.

[73] W. Schuphan. E?ects of the application of inorganic and organic manures on the market quality and on the biological value of agricultural products. Qual. Plant. Mater. Veg., XXI:381–398, 1973.

[74] W. Schuphan. Food plants - fresh, prepared, processed - in relation to standards of living and potential diseases of civilization. Plant Foods for Human Nutrition, XXIII:33–74, 1973.

[75] W. Schuphan. Experimental contributions to the problem of improving the nutritional quality of food plants. Plant Foods for Human Nutrition, XXIV:1– 18, 1974.

[76] W. Schuphan. Nutritional value of crops as in?uenced by organic and inorganic fertilizer treatments. Plant Foods for Human Nutrition, XXIII:333–358, 1974.

[77] W. Schuphan. The signi?cance of nitrates in food and potable waters. Plant Foods for Human Nutrition, XXIV:19–35, 1974.

[78] T. L. Senn. Seaweed research in crop production, 1958 - 1978. Technical report, Clemson University.

[79] L. L. Van Slyke. Fertilizers and Crops. Orange Judd Co, 1912. Highly recommended.

[80] J. G. Smith. In?uence of crop background on natural enemies of aphids on brussels sprouts. Annals of Applied Biology, 83:15–29, 1976.

[81] R. M. Smith. Manures and Fertilizers. Thoman Nilson & Sons, Ltd., 1952.

[82] H. B. Sprague, editor. Hunger Signs In Crops. David McKay Co., 1964.

[83] R. L. Tate. Soil Organic Matterp. John Wiley & Sons, 1987.

[84] James S. Poles (National Coalition Against the Misuse of Pesticides). private correspondence.

[85] C. W. Thorne. Farm Manures. Orange Judd Co., 1913.

[86] L.M. Thompson & F.R. Troeh. Soils and Soil Fertility. McGraw-Hill, 1973. A small book but full of practical information.

[87] V. J. Kilmer, S. E. Younts, N. C. Brady,. The Role of Potassium in Agriculture. Soil Science Society of America, 1968.

[88] A. v. Wistinghausen. The value of domestic animals. Biodynamics, 1981.

[89] H. Vogtmann. Organic farming research in europe: E?ects of agricultural practices on soil and plant quality. Bulletin #24, IFOAM (International Federation of Organic Agriculture Movements), 1978.

[90] W. Brinton, Jr. Unpublished data.

[91] J. R. Watson. Mulch against root-knot. Press Bulletin 586, University of Florida Agricultural Experiment, 1943.

[92] W. A. Way. The manure primer. Technical report, Cooperative Extension Service, University of Vermont, 1983.

[93] W. A. Way. Spread those ashes. New England Farmer. 1985.

[94] H.J. Wheeler. Manures and Fertilizers. Macmillan, 1913. Among the best of the out-of-print selections.

[95] M. A. Altieri & W. H. Whitcomb. The potential use of weeds in the manipulation of bene?cial insects. HortScience, 14:12–18, 1979.

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