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		Computation for studies of soil fertility and fertilizers requirements J.D. Colwell by Colwell, J.D. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Slough Commonwealth Agricultural Bureaux 1978Availability: Items available for loan: 1 Call number: 631.42 C727C. Place hold Add to cart (remove)

		Estimating fertilizer requirements : a quantitative approach J.D. Colwell by Colwell, J.D. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Wallingford CAB International 1994Availability: Items available for loan: 1 Call number: 631.8 C727E. Place hold Add to cart (remove)

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