Abstract
Abstract It was found that the population of intercropped soybean and maize affected grain yield of both crops. This research analyzed the effects of maize double-row distances and intercropping with soybean on maize yield in dryland of East Lombok, Indonesia. The Split Plot design was applied to organize the two-factor experiment in three blocks. The main plot factor was intercropping (T0 = maize only; T1 = intercropping with Detap-1; T2 = with Dena-1 soybean variety) while the subplot was double-row distance (D1 = 80; D2 = 90; D3 = 100 cm). The results indicated that additive intercropping with soybean and increasing maize double-row distances in general significantly increased maize yield and its yield components, in which intercropping increased maize grain yield by an average of 22.3% with Detap-1 and 22.2% with Dena-1. However, the interaction effects were significant on cob weight, stover weight, harvest index, and grain yield per plant, in which maize grain yield under D3 increased by 29.9% in intercropping with Detap-1 (118.1 g/plant) and by 23.6% in intercropping with Dena-1 (112 g/plant), while monocropped maize yield increased by only 4.7% from D1 to D3 (86.85 versus 90.95 g/plant). These results highlight the importance of additive intercropping maize with soybean under wider maize double-row distances.
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