Abstract
Optimal sowing date is essential to attain high maize (Zea mays L.) productivity despite environmental variation in low-input agriculture in Zambia. Local farmers generally plant maize as early as possible after the onset of the rainy season. However, there is no scientific evidence that this timing is optimal for attaining high productivity using local practices. To address this probem, we grew maize at three sowing dates in six fields of Zambia’s Southern Province in the 2008/09 and 2009/10 growing seasons. Grain yield was reduced by delayed sowing, by an average of 19% for all years and locations combined. The reduction resulted from decreased biomass production and harvest index. These results support the early sowing practice applied by local farmers.
