Peter A. Opala

Effect of Sources of Phosphorus on Phosphorus Sorption in Cambisols and Ferralsols of Western Kenya

Peter A. Opala · International Journal of Plant & Soil Science · 2015

The influence of two organic materials (OMs); Tithonia and FYM and inorganic materials; triple superphosphate (TSP) and Minjingu phosphate rock (MPR) and Busumbu phosphate rock (BPR), when applied alone or in combination, on P sorption at two sites, Kakamega and Bukura, in wester...

Open access Research Article 10.9734/IJPSS/2015/9215

An Agronomic and Economic Evaluation of Integrated use of Calliandra callothyrsus and Maize Stover with Urea in Western Kenya

Robert O. Nyambati & Peter A. Opala · Journal of Experimental Agriculture International · 2013

The agronomic effectiveness of integrating organic and inorganic nutrient sources has been demonstrated in Kenya but economic analysis is often lacking in such studies thus denying farmers the information required to make informed choices. We investigated the effect of two organi...

Open access Research Article 10.9734/AJEA/2014/6414