• To compare soil properties including physical, chemical and biological soil properties among different agricultural practice in rice field.
• To select and evaluate suitable soil quality indicator from the soil properties in rice field.
• To develop a predictive mathematical equation for soil quality using soil biological indicators in the monitoring program for rice field and validate the predictive mathematical equation under existing rice field.
• To investigate microbial diversity for serving as a soil biological indicator which can be further developed to be used in rice field.