Greenhouse evaluation of agronomic potential of different sources of phosphate fertilizer in a typical concretionary soil of Northern Ghana

摘要: The concretionary soils of Northern Ghana, which are near neutral with respect to pH and comprise mostly lateritic ferruginous nodules known sorb significant amounts phosphate. Instead imported superphosphate, the use less expensive indigenous Togo rock phosphate (PR) or partially acidulated (50%) (PAPR-50), possible alternative fertilizer options for these soils. objective this research was evaluate effectiveness freshly-applied SSP, PR PAPR-50, residues fertilizers in a glasshouse pot study. Laboratory studies were also undertaken study transformation after their application In greenhouse study, yield dried tops P uptake by maize var. Dobidi (Zea mays) used measure effectiveness. One level applied each (26.4 kg ha−1). Plants grown 28 days. After harvesting first crop, subsequent cropping carried out effects residual pots. results showed that increases dry matter shoot total followed trend SSP > PAPR-50 control. relative agronomic effciency (RAE) 58% commercial increasing growth while only 23%. effect either on found be negligible compared suggesting apatitic poorly effective fractionation confirmed did not significantly increase any fractions soil fines crop. By contrast, increased all extractable Pi fractions, most added being recovered from forms associated Fe (hydroxide Pi). It is concluded that, studied sustainable plant production.