TY  - PRO
AU  - Nyamudeza,P.
AU  - CIMMYT
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
TI  - Water and fertilizer management for rainfed maize production in semi-arid South East Zimbabwe
SN  - 92-9146-065-6
U1  - 633.15 
PY  - 1999///
CY  - Addis Ababa (Ethiopia)
PB  - CIMMYT|EARO
KW  - Fertilizers
KW  - AGROVOC
KW  - Maize
KW  - Nitrogen
KW  - Semiarid climate
KW  - Semiarid zones
KW  - Small farms
KW  - Water
KW  - Zimbabwe
KW  - Zea mays
KW  - Yields
KW  - CIMMYT
N2  - Maize was grown in the furrows of tied ridges and on flat land at five N rates; 0, 40, 80, 120 and 160 kg N ha-1 in the 1995/96 and 1996/97 rainy seasons. The experiment was conducted on several sites with sandy loam (Save Valley) and heavy clay (Chisumbanje) soils. In Save Valley, averaged across sites, furrows increased grain yield by 32% in 1995/96 and 145% in 1996/97. In Chisumbanje, the rainfall was relatively good in both seasons and the crop in furrows and on flat plots produced similar yields. Yield response to furrows was better related to the rainfall to tasselling than to total seasonal rainfall. The rainfall to tasselling above which furrows had no benefit was 400 mm. In Save Valley, averaged across sites, N increased grain yield by greater margins in furrows, 47 and 63% compared to 38 and 40% on flat plots in 1995/96 and 1996/97 respectively. In Chisumbanje. N increased grain yield by 130% in furrows and 87% on flat plots in 1995/96 and by a similar margin of about 70% in 1996/97. Nitrogen use efficiency (grain yield increase per unit of applied N) was highest at 40 kg N ha-1 on furrow plots. These were 27 and 29 kg (grain) kg-1 of applied N on the sandy loam and the heavy clay respectively
ER  -