Communications in Soil Science and Plant Analysis · 1988 · 16 citations · 9 references
AgricultureAgronomySoil SciencesNutrient ManagementSoil FertilitySoil ScienceFertilizer SourcesMineral Nutrient EnhancementPhosphate MineralsPhosphorus CyclePhosphorus ManagementPhosphorus NutritionAgronomic ManagementAgronomic ProductivityPhosphate Availability In SoilPhosphate FertilizersPhosphorus FertilizationPhosphorus Fixation In SoilsPhosphorus Uptake EnhancementSoil Phosphorus Availability
Abstract In a greenhouse experiment, the relative agronomic effectiveness of Togo and Egypt rock phosphate sources were compared with triple superphosphate on high fixing volcanic ash soil of Ethiopia using (Medicago sativa) lucerne as the indicator crop. The P applied ranged from 0 to 160 kg P/ha. In the first cutting, Togo and Egypt rocks were relatively most effective at 60 and 43 kg P/ha, respectively. At these rates, Egyptian rock phosphate was 92% as effective as triple superphosphate compared with 64% for the Togo rock phosphate. Residual values of TSP were also higher than those of the rocks.
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Properties and Management of Soils in the Tropics
Pedro Antonio Sánchez Miguel · Soil Science · 1977 · 1.3K citations
Soil Testing and Plant Analysis
P. W. Arnold · Geoderma · 1974 · 918 citations