2003
DOI: 10.1017/s0014479703001364
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Grain Legumes in Pearl Millet Systems in Northern Namibia: An Assessment of Potential Nitrogen Contributions

Abstract: A nutrient-balance model was used to investigate the nitrogen contributions of cowpea (Vigna unguiculata) to pearl millet (Pennisetum glaucum) intercropping systems in semi-arid northern Namibia. Data on nitrogen fixation, production, crop nitrogen off-take and competition effects came from two seasons of fieldwork. Supplementary data were taken from secondary sources. The model was used as a tool to attempt to identify grain legume management options with the potential to make significant contributions to soi… Show more

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Cited by 11 publications
(13 citation statements)
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“…Br.)] and sorghum (Sorghum bicolor [L.] Moench) (McDonagh and Hillyer, 2003). It is grown by 95% of smallscale farmers in the north and central regions including Oshikoto, Oshana, Ohangwena and Omusati (Fleissner and Bagnall-Oakeley, 2001).…”
Section: Introductionmentioning
confidence: 99%
“…Br.)] and sorghum (Sorghum bicolor [L.] Moench) (McDonagh and Hillyer, 2003). It is grown by 95% of smallscale farmers in the north and central regions including Oshikoto, Oshana, Ohangwena and Omusati (Fleissner and Bagnall-Oakeley, 2001).…”
Section: Introductionmentioning
confidence: 99%
“…Conversely, ehenge undergoes waterlogging during good rainfall years ("[ehenge] used to be full of water"), which strongly limits pearl millet growth. These soil hydrological characteristics are difficult to assess during standard field surveys and the integration of these characteristics in KwSU definitions is crucial for SQ evaluation as soil water availability is the most significant limitation in semi-arid regions (McDonagh and Hillyer, 2003).…”
Section: Oshikwanyama Soil Units: a Homogeneous Body Of Soil Knowledgementioning
confidence: 99%
“…When the precipitation is more than 300 to 350 mm (Latha et al, 2004), pearl millet can grow well without significant reduction of the yield. However, due to the scarce and unreliable rainfall distribution, the probability of the occurrence of a drought in any given year is 50% in Namibia (McDonagh and Hillyer, 2003). Previously, we found a significant suppressive effect of cowpea on the ability of pearl millet to extract stored soil water when subjected to drought (ZegadaLizarazu et al, 2005(ZegadaLizarazu et al, , 2006a.…”
mentioning
confidence: 91%
“…The large amounts of water accumulated in deep layers of lower slopes or lowlands may contribute to these yield gradients. In north-central Namibia, more than 90% of the farmers cultivate pearl millet as a staple food (McDonagh and Hillyer, 2003) because this is the best cereal crop that can survive under natural rainfall in the semiarid environment of northern Namibia. Although data on the yield of pearl millet in these areas is lacking, the average was 225 kg ha -1 from 1990 to 1993 (Matanyaire, 1998).…”
mentioning
confidence: 99%
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