Evaluation of Minjingu phosphate rock products as sources of phosphorus for maize and sorghum in some Morogoro and Hai soils
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Date
1991
Authors
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Publisher
Sokoine University of Agriculture
Abstract
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
Description
Dissertation
Keywords
Phosphorus production, Minjingu phosphate rock, Phosphate rock, Phosphate fertilizers