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	1.	Paraplowing a Piedmont soil for improving crop performance by Tollner, E.W National Symposium on Conservation System. Hyatt Regency Chicago, Illinois Center (USA). 14-15 Dec 1987 Clark, R.L [coaut.] Hargrove, W.L [coaut.] Material type: Text Language: En Publication details: 1987 In: Optimum erosion control at least cost: proceedings of the national symposium on conservation systems. St. Joseph, Mich. (USA). American Society of Agricultural Engineers. 1987. p. 327-33189-013425 Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: 89-013425. Place hold Log in to add tags Add to cart (remove)
	2.	Zea mays L.: A summary of reports on the resistance of plant introductions to diseases, insects, and mites by Clark, R.L Dietz, S.M [coaut.] Jarvis, J.L [coaut.] Oakes, A.J [coaut.] Sowell G [coaut.] Material type: Text Language: En Publication details: Ames, IA (USA) : Regional Plant Introduction Station, 1980 Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: REP-2745. Place hold Log in to add tags Add to cart (remove)
	3.	Large core soil sampler by Manor, G Clark, R.L [coaut.] Radcliffe, D.E [coaut.] Tollner, E.W [coaut.] Material type: Text Publication details: 1990 Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: 92-078723. Place hold Log in to add tags Add to cart (remove)

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