Peter Asbon Opala, John Robert Okalebo, Caleb Othieno
(Taylor & Francis, 2013-03-01)
The effects of farmyard manure (FYM), Tithonia diversifolia (tithonia) and urea when applied alone or in combination with Minjingu phosphate rock (MPR), Busumbu phosphate rock (BPR) or triple superphosphate (TSP) on soil ...