Responses of 3 Mungbean Cultivas under Different Planting Rates

Abstract

Three mungbean cultivars, PHLV 18, CES ID-21, and U-Thong 1 were grown under 3 planting rates, namely, 38,400 plantslrai (50 x 25 cm. 3 plants per hill) 51,200 plantslrai (50 x 25 cm. 4 plants per hill and 50 x 12.5 cm. 2 plants per hill) and 76,800 plantslrai (50 x 12.5 cm. 3 plants per hill). It was found that number of plants per hill affected agronomic characters more distinctly than planting rates per se. When averaged across 3 cultivars, the plots planted to 4 plants per hill were later in flowering and maturity dates. They also grew taller and thus lodged more than those plots planted to 3 or 2 plants per hill. Although planting rates did not systematically affect yield and its components, dry weight of weeds per square meter was reduced significantly as planting rates increased.