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	1.	Field crop production on organic farms in the Midwest [Comparison with conventional farms, yields, returns, soils, USA] by Lockeretz, W Klepper, R [coaut.] Shearer, G [coaut.] Sweeney, S [coaut.] Material type: Article Language: En Publication details: 1978 In: Journal of Soil and Water Conservation v. 33, no. 3, p. 130-13478-329521 Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: 78-329521. Place hold Log in to add tags Add to cart (remove)
	2.	Use of variations in the natural abundance of 15N to study sources, transformations and movement of nitrogen in a plant-soil-water system by Shearer, G Research Co-ordination Meeting on Origin and Fate of Chemical Residues in Food, Agriculture and Fisheries. Vienna (Austria). 5 Nov 1973 Commoner, B [coaut.] Kohl, D.H [coaut.] Material type: Text Publication details: 1975 In: IAEA-STI-PUB-399 FAO, Vienna (Austria). Joint FAO/IAEA Div. of Atomic Energy in Food and Agriculture. Origin and fate of chemical residues in food, agriculture and fisheries. [Report of proceedings]. Vienna (Austria). International Atomic Energy Agency. Sep 1975. p. 77-104 Panel Proceedings Series (IAEA) Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: 76-082936. Place hold Log in to add tags Add to cart (remove)

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