P. A. Opala

Response of Maize to Organic and Inorganic Sources of Nutrients in Acid Soils of Kenya

P. A. Opala, R. O. Nyambati & P. O. Kisinyo · Journal of Experimental Agriculture International · 2014

Maize yield in Kericho County, Kenya is limited by infertile acidic soils. The effect of inorganic sources of nutrients and amendments; triple superphosphate (TSP), calcium ammonium nitrate (CAN) and lime, were compared to a range of organic nutrient sources; Farmyard manure (FYM...

Open access Research Article 10.9734/AJEA/2014/6415

Response of Sorghum (Sorghum bicolor (L.) Munch) and Chemical Characteristics of Soil to Organic and Inorganic Fertilizers on Kenyan Lower Midlands Acid Soil

P. O. Kisinyo, P. A. Opala & S. O. Gudu · International Journal of Plant & Soil Science · 2019

Soil acidity, low level of nitrogen (N), phosphorus (P) and soil organic matter are major constraints to sorghum production in Kenya. We investigated the effect of farmyard manure (FYM) and combined application of inorganic nitrogen and phosphate fertilizers applied as calcium am...

Open access Research Article 10.9734/ijpss/2019/v28i130099

Micro-Dosing of Inorganic Inputs on Maize Production on an Acid Soil in Kenya: An Agronomic and Economic Evaluation

P. O. Kisinyo, P. A. Opala, S. O. Gudu & C. O. Othieno · Journal of Experimental Agriculture International · 2015

Aims: The study determined the effect of micro-dosing of lime, P and N fertilizers on maize grain yield and economic benefits. Study Design: The experiment was a 2 x 2 x 3 split-split plot laid out in randomized complete block design with N (0 and 37.5 kg N ha-1) in the main plot...

Open access Research Article 10.9734/AJEA/2015/17984