Chemistry and Fertility Characteristics of Paddy Soils in the Northern Region

Abstract

The chemistry and fertility characteristics of paddy soils in the northern region of Thailand were studied. Approximately 173 soil samples from 8 provinces in the northern-region were collected. The analytical data showed that most of the soil samples from this region gave pH values between 5.02-5.86. The values of organic carbon were between 0.90-1.26%. The total nitrogen and available phosphorus were very low in these soil samples, therefore, the application of fertilizer to these soils would be necessary to increase rice yield. Chemistry and Fertility Characteristics of Paddy Soils in the Northern Region.