Evaluation of maize-soybean intercropping on specific dry land in Gunungkidul – Yogyakarta

Abstract

Evaluation of the value competition and yield advantages of maize soybean intercropping in dry land is still limited. The study aimed to determine the competitive value and yield of maize soybean intercropping on dry land through the right combination of plant varieties. The study was conducted in Trengguno kidul, Sidorejo, Ponjong, Gunungkidul from March to August 2020. The study was randomized block design with 5 replication, 3 maize varieties (Srikandi Ungu, Pulut Uri 1, Nasa 29), and 2 soybeans varieties (Dega 1 and Biosoy 2), so there are 6 intercropping combinations, and monoculture planting as a comparison. Agronomic observations and data collection were carried out until harvest with the observation of Land Aquivalent Ratio, Competitive Ratio, Relative Crowding Coefficient, Aggressivity, and Actual Yield Loss. The results showed that intercropping of maize and soybeans in the dry land of Gunungkidul was very profitable. Maize is more aggressive and competitive than soybeans so that they contribute profits to the Land Equivalent Ratio, Competitive Ratio, Aggressivity, and Actual Yield Loss. The intercropping of Srikandi ungu and Biosoy 2 yielded the highest of total Land Equivalent Ratio and a total of Actual Yield Loss were 2.89 and 2.80 respectively.