Studies on the Influence of Different Algerian Rock Phosphates when Reinforced with Leguminous Plant Material Like Cow-Pea (Vigna-Sinensis) on Carbon Transformations, Exchangeable Calcium and pH of the Alkali Soil

抄録

The beneficial effect of various sparingly soluble phosphates such as Algerian rock phosphates, when mixed with organic matter like cow-pea and added to the alkali soils, is clear from the fall in pH of these alkali soils. Not only the pH is lowered but also the exchangeable calcium, and, the availability of phosphates increases markedly. Hence, these alkali soils ultimately become fertile and cultivable.