The reaction of soil acidity - pH of the soil. In most cases, the pH of the Very strongly acid (pH 4.5-5.0), followed by a Strongly acid (pH 5.1-5.5) and Neutral (pH 6.6-7.3) by Paddy mostly Neutral, grasslands. Is Strongly acid, grove as Medium acid (pH 5.6-6.0) and Slightly acid (pH 6.1-6.5), the crop is Very strongly acid and Strongly acid, the rubber is Very strongly acid, as shown in Table 4. 4
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