Abstract In this study, the effect of various types fertilizers on natural radioactivity levels in agricultural soil was investigated research. The activity concentration 226Ra, 232Th, and 40K fertilizer samples were determined by using gamma-ray spectroscopy a high-purity germanium (HPGe) detector to determine concentrations 40K. for phosphate raw (2300-5400) Bq/kg, (9-53) (56-3000) respective...

Evaluation of various natural diets for mass rearing Spodoptera frugiperda J.E Smith (Lepidoptera: Noctuidae).Spodoptera is one the pests that attack corn in Indonesia. This study aimed to evaluate most suitable dietfor S. from diets. The was conducted vitro. treatments were consisted ofvariation on diets, such as maize leaf, green mustard water spinach, sweet potato sugar caneleaf, and soybean...