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020 _a92-9146-065-6
040 _aMX-TxCIM
072 0 _aF04
072 0 _aP30
082 0 4 _a633.15
_bEAS No. 6
100 1 _aBenson, 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 _aThe geography of sulphur and phosphorus response in maize in Malawi
260 _aAddis Ababa (Ethiopia)
_bCIMMYT|EARO :
_c1999
300 _ap. 302-306
340 _aPrinted
520 _aWhile nitrogen is the nutrient most limiting maize growth in Malawi, in large areas of the country phosphorus and sulphur are also required. The most comprehensive evaluation of where response to these two nutrients occurs in Malawi was that of Brown in 1962. Since then fertilizer use on maize by smallholders and the planting of hybrids has increased significantly. This paper considers whether the spatial patterns of nutrient response in maize have changed over the past 35 years with these changes in the cropping system. A fertilizer trial was conducted by all Extension Field Assistants nation-wide in 1995/96. The aim was to develop area-specific fertilizer recommendations, and, as such, the trial was not designed as a full factorial with different rates of individual nutrients. Nevertheless, indications of response in maize to phosphorus and sulphur in an area can be derived from the results. Yield data were acquired from over 1650 sites. Using these data, the current response in maize to the application of P and S is examined. Comparisons are made to the work of Brown and that of later researchers on this topic. District-level guidelines for extension workers on whether or not farmers need to annually apply phosphorus and sulphur to their maize are provided.
546 _aEnglish
591 _a0103|AL-Maize Program|AGRIS 0102|AJ
595 _aCPC
650 1 7 _aCropping systems
_gAGROVOC
_2
_91068
650 1 7 _aFertilizers
_gAGROVOC
_2
_91111
650 1 0 _aGeography
650 1 7 _aMaize
_gAGROVOC
_2
_91173
650 1 0 _aMalawi
650 1 0 _aNitrogen
650 1 0 _aNutrients
_91192
650 1 0 _aPhosphorus
650 1 7 _aSmall farms
_gAGROVOC
_2
_91260
650 1 0 _aSulphur
653 0 _aCIMMYT
650 1 0 _91314
_aZea mays
_gAGROVOC
700 1 _aCIMMYT
700 1 _aKumwenda, J.D.T.,
_ecoaut.
942 _cPRO
999 _c10048
_d10048