Earthworm Casts ( Pheretema sp.) Nutrient Contents of Nampong Soil Series (Ustoxic Quartzipsamment) in Northeast Thailand

摘要

This earthworm cast experiment was carried out at four different sites of Nampong soil series (Ustoxic quartzipsamment) namely dipterocarp forest, tamarind orchard farm, grazing pasture, and sugarcane plantation. The results showed that earthworm casts of