Pampanga State Agricultural University

Office of the Library Services and Museum

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1.
Computation for studies of soil fertility and fertilizer requirements / J. D. Colwell. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Slaugh, England : Commonwealth Agricultural Bureaux, 1978
Availability: Items available for loan: PSAU OLM (1)Call number: C 631.4 C72 1978.

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Estimating fertilizer requirements : a quantitative approach / J.D. Colwell. by
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Wallingford, UK : CAB International, c1994
Availability: Items available for loan: PSAU OLM (1)Call number: C 631.8 C727 1994.

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