Evaluation System of Intercropping Functional Food Sweet Corn and Vegetable Soybean in Different Planting Density and Compound Fertilizers Dosages

Abstract

This study evaluated the sweet corn and vegetable soybeans intercropping system when applying various organic fertilizer sources and NPK fertilizer dosage. Conducted from June until August 2022 in Umbulharjo village, Yogyakarta, the study was carried out in factorial Randomized Complete Block Design under three replications. The first factor was density plant hill−1 consisting fourt levels (1+1; 2+1; 1+2; 2+2), the second was NPK dosage comprising three levels (100, 200, 300) kg ha−1, which eventually gained 42 units of plots. The observation variables involve components of yield, growth, and land efficiency. Variance test (ANOVA) at a value significant at 5% was used to analyze research data statistically and then followed by Duncan’s Multiple Range Test at the same significance level. The result indicated that applying a combination of chicken manure under NPK dosage of 300 kg ha−1 showed the sweet corn and vegetable soybean intercropping’s finest growth and yield, and the land efficiency component presented a Land Equivalent Ratio of 1.55 and Competition index of 0.92.