Acid soils of the study showed that the P. Before planting, the P values ranged from 9.17 to 10.96, which did not differ statistically. When rice is 30 days, P value increased, which is likely due and Basalt Bio fertilizer helps to nourish the soil. And when it is released to increase P. After harvest, the pH Increased slightly and significantly (<0.01) and treatment with P increased the most was the tmt 6 treatments that increased minimum tmt 4.
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