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A comparison of the rock phosphatemobilizing capacities of various crop species

Research Papers
E.N. Flach
Department of Soil Science and Plant Nutrition, Agricultural University. Wageningen, Netherlands
W. Quak
Department of Soil Science and Plant Nutrition, Agricultural University. Wageningen, Netherlands
A. van Diest
Department of Soil Science and Plant Nutrition, Agricultural University. Wageningen, Netherlands
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Keywords

Alkaline uptake pattern
Cowpea
Finger millet
Maize
Mass action equilibrium
Pearl millet
Rock phosphate-Mobilizing capacity

How to Cite

A comparison of the rock phosphatemobilizing capacities of various crop species. (1987). Tropical Agriculture, 64(4). https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/2074
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Abstract

The rock phosphate-mobilizing capacity of three cereals was tested in a pot experiment. It was shown that this capacity increased in the order maize < pearl millet < finger millet. This was also the order of increasing quantities of calcium absorbed by the three species. It is reasoned that the shift in mass-action equilibrium of alkaline rock phosphates was not present in finger millet and therefore could not account for its rock-phosphate mobilizing capacity. The results obtained with the millet species in this experiment do not support the general view that millet belongs to the category of plants incapable of utilizing rock phosphate-P.
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