Record Details


Field	Value

Title	Simulating nitrogen fertilizer response in low-input farming systems of Malawi

Names	Robertson, M. Benson, T. Shamudzarira, Z.
Date Issued	2000 (iso8601)
Abstract	This paper reports on the validation of the Agricultural Production Systems Simulator (APSIM) model for simulating the response of maize to N fertilizer in low-input maize production systems in Malawi and Zimbabwe, with a special focus on the marginal benefit from using small amounts of fertilizer, rather than applying it at optimal rates. In 1998/99, in experimental plots where no N fertilizer was applied, yields varied from 442 to 4,800 kg/ha across 5 sites. The model simulated yields in the range of 1,277-4,784 kg/ha for the same locations. Actual response to 69 kg/ha of applied N varied over the 5 experimental sites chosen for the validation exercise using data for 1997/98 and 1998/99. The model accurately simulated a response to applied Nat four of the five trial sites selected for the validation test.
Genre	Working Paper
Access Condition	Open Access
Identifier	1665-045-X

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