Influence of phosphorus application on growth and yield of soybean genotypes in the tropical savannas of northeast Nigeria

<i>Bradyrhizobium japonicum</i> Inoculation and Phosphorus Supplementation on Growth and Chlorophyll Accumulation in Soybean (<i>Glycine max</i> L.)

“…Sufficient phosphorus is also required to enhance different plant organs growth, promote nodulation and early maturity in legumes [12]. Studies by Shahid, Saleem, Khan and Anjum, 2009 [13] indicated that, increased phosphorus application enhanced plant height significantly.…”

Effect of Phosphorus Fertilizer on Nitrogen Fixation by Some Grain Legume Varieties in Sudano – Sahelian Zone of North Eastern Nigeria

“…However, low phosphorus content of the soil in Sudano-Sahelian region may restrict rhizobia population and legume root development, which in turn can affect their N 2 fixing potential (Kwari, 2005). Studies conducted by researchers in Savanna regions of Nigeria showed that application of P at the rate 20-40 kgha -1 significantly improved the performances of the grain legumes, groundnut ( Balasubramanian and Nnadi 1980) ; bambara groundnut (Balarabe et al, 1998); cowpea (Uzoma et al, 2006) and soybean (Kamara et al, 2007). However, information on the P requirements of the grain legumes for optimum N 2 fixation in Sudanosahelian agro-ecological zone is lacking.…”

Water use and grain yield response of rainfed soybean to tillage-mulch practices in southeastern Nigeria

“…Similarly, available P was the only fertility parameter that differed (p ≤ 0.05) under the unmulched plots (18.6 mg kg -1 soil) and their mulched counterparts (21.9 mg kg -1 soil). Soybean is a high P-dependent crop in the savanna region of Nigeria (Chiezey and Odunze, 2009;Kamara et al, 2007;Mahamood et al, 2009). So, the more favorable P status of the mulched than the unmulched treatments may likely be the reason for the numerically higher yields under the former than the latter.…”

“…The cultivation of soybean (Glycine max L. Merrill) is, compared to other vegetable legumes, on the increase in Nigeria as the crop has lately been introduced to other parts from the southern Guinea Savanna region owing to its nutritive and economic values (Dugje et al, 2009;Kamara et al, 2007;Lasisi and Aluko, 2009). In various locations in the southwestern part of the forest-savanna transition zone, research-based tillage requirement of the crop has been taken care of (Ahaneku, 2006;Lasisi and Aluko, 2009;Onwualu and Ahaneku, 2001).…”