Simulating nitrogen fertilizer response in low-input farming systems of Malawi
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.
Main Authors: | Robertson, M., Benson, T., Shamudzarira, Z. |
---|---|
Format: | Working Paper biblioteca |
Language: | English |
Published: |
CIMMYT
2000
|
Subjects: | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY, MAIZE, SIMULATION MODELS, NITROGEN FERTILIZERS, |
Online Access: | http://hdl.handle.net/10883/3667 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Simulating the response of maize to nitrogen fertilizer in semiarid Zimbabwe
by: Shamudzarira, Z., et al.
Published: (2000) -
Exploring farmer options for maize production strategies via scenario analysis using the APSIM model-an example of the approach
by: Keating, B., et al.
Published: (2000) -
Optimizing nitrogen fertilizer and planting density levels for maize production under current climate conditions in Northwest Ethiopian midlands
by: Abebe Zeleke, et al.
Published: (2023) -
Modeling the growth, yield and N dynamics of wheat for decoding the tillage and nitrogen nexus in 8-years long-term conservation agriculture based maize-wheat system
by: Kumar, K., et al.
Published: (2024) -
Effects of varieties and nitrogen fertilizer on yield and yield components of maize on farmers field in mid altitude areas of western Ethiopia
by: Abera, T., et al.
Published: (2017)