| dc.description.abstract | The characteristic of the acid sulfate soils is very fragile; soil and water characteristic change rapidly in different time and condition. Soil ph changes from one site to other sites as well us from rainy season to dry season. The changing of soil pH affect most of other soil chemical properties such as solubility of AI, Fe and other nutrients in the soils. Usually improving low pH soil is by application of lime. However, application of lime on acid sulfate soil is not suitable because needs much of lime and very low-pH water come periodically. Therefore, other methods to improve soil pH in acid sulphate soil should he created for rice cultivation. This research uses many kinds of soil ameliorant of rock phosphate, humic acid, and vulvic acid, etc for for masking Al in the ricepelcis. In the same time water management should be done to reduce the hazardous element of aluminum. | id |
