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003 MX-TxCIM
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020 _a92-9146-065-6
040 _aMX-TxCIM
072 0 _aF01
072 0 _aF04
082 0 4 _a633.15
_bEAS No. 6
100 1 _aMugabe, F.T.
_uMaize Production Technology for the Future: Challenges and Opportunities. Proceedings of the Eastern and Southern Africa Regional Maize Conference, 6; Addis Ababa (Ethiopia); 21-25 Sep 1998
110 2 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
245 0 0 _aUse of the ceres-maize model to evaluate effects of planting dates on the yields of maize in a semi-arid area in Zimbabwe
260 _aAddis Ababa (Ethiopia)
_bCIMMYT|EARO :
_c1999
300 _ap. 296-298
340 _aPrinted
520 _aDelayed planting in communal areas is mainly caused by lack of draught power and insufficient/late rainfall at the beginning of the cropping season. Information on the effect of late planting and its interactions with inorganic fertilizers on crop yields in the semi-arid areas is scarce. The maize variety CG4141 was grown at Chiredzi Research Station and Chivi under four nitrogen levels during the 1996/7 and 1997/8 seasons. The data collected and historical trial data from Chiredzi Research Station was used to validate the CERES-maize model (v3.1). The model was used to evaluate the effect of planting dates on the yields of maize which was fertilized with four levels of nitrogen (O, 15,30 and 60 kg ha-1) for two seasons in Chivi during the 1995/6 and 1996/7 seasons. The model, which over predicted grain yield by 1.5 % was considered reasonable as indicated by a slope coefficient of 0.82 of the estimated equation and an R2 value of 0.66. Both the 1995/6 and 1996/7 simulated yields from the planting scenarios performed shows that planting can be extended to early December, late December, early January and late January without a significant decrease in yield by adding no nitrogen, 15,30 and 60 kg ha-1 respectively. Yield penalties associated with delayed planting increased with additional fertilizer levels.
546 _aEnglish
591 _a0103|AL-Maize Program|AGRIS 0102|AJ
595 _aCPC
650 1 0 _aFertilizers
_91111
650 1 0 _aMaize
_91173
650 1 0 _aNutrients
_91192
650 1 0 _aPilot farms
650 1 0 _aProject evaluation
650 1 0 _aSemiarid climate
650 1 0 _aSemiarid zones
650 1 0 _aSmall farms
_91260
650 1 0 _aZimbabwe
653 0 _aCIMMYT
650 1 0 _91314
_aZea mays
_gAGROVOC
650 1 0 _91313
_aYields
_gAGROVOC
700 1 _aCIMMYT
942 _cPRO
999 _c10046
_d10046