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Abstract

Phosphorus deficiency is a serious concern for agriculture productivity around the globe. It readily forms insoluble compounds by reacting with calcium after addition to calcareous soils. We evaluated six Brassica cultivars for P utilization from mono-ammonium phosphate (a soluble source) and a relatively insoluble P compound (Tri-calcium phosphate). Plants were germinated in sand and transplanted in a P-free Johnson’s nutrient solution contained in two iron tubs. Phosphorus (@ 0.2 mM P) was applied in each tub using both sources. Cultivars differed significantly for their biomass grown with either source of P. Biomass was significantly (p

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