Browsing by Author "Kimbi, Gerald Gervas"

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    Evaluation of Minjingu phosphate rock products as sources of phosphorus for maize and sorghum in some Morogoro and Hai soils
    (Sokoine University of Agriculture, 1991) Kimbi, Gerald Gervas
    Experiments effectiveness were partially of to evaluatethe acidulated phosphate rock conducted (PAPR) and non acidulated Minjingu phosphate rock (PR) as sources of for phosphorus maize and sorghum. Two studies was the test crop in the initial pot study and two field experiments were conducted.Maize in the field experiments while sorghum was used in the residual pot study.Five soils, namely Kwa Sadala, Mlama, Mafiga,Magadu and University Gate,varying widely in properties were used. Results of these experiments showed that all the P carriers increased yields in Mlama, Magadu and University Gate soils, indicating that the three soils were P deficient and thus required supplemental P. The KwaSadala and Mafiga soils, with high available P and nearly, neutral pH values, did not respond to either of the P sources.The initial PAPRs and results study indicated non ac i dulated PRs had the nearing that pot of University Gate that the fertilizer values TSPin soilsthe PAPRs and PRs were generally Mlama soil. In the Magadu and inferior to TSP. Results of the residual pot study showed that the PAPRs and PRs had superior residual effectiveness compared to TSP in Magadu, indicating that overMlama and time the P dissolved in the three soils.University Gate soils, carriers substantially