The effect of the number of rows and varieties of soybean on growth and yield in intercropping with corn

Abstract

Intercropping is a breakthrough in land use optimization. This study aim is to determine the effect of the number of rows and soybean varieties on the growth and yield of soybean in intercropping with corn. This study was set in a split plot design with three replication. The main plot was soybean varieties: Dena-1 (V1), Detap-1 (V2) and Deja-1 (V3), while subplots were the number of rows of soybean planting lines: Monoculture (B0), 3 rows of soybean-3 rows of corn (B1), 4 rows of soybean-3 rows of corn (B2), and 6 rows of soybean-3 rows of corn (B3). The results show that V1 has the lowest plant height as 83.04 cm. The highest number of filled pods is achieved at V2B0 with 78.53 pods but not significantly different with V2B3 as 71.77 pods. B3 gave the lowest plant height 82.74 cm, weight of 100 seeds 15.93 g, and yield weight of 1.13 t ha-1. The lowest populations of Nezara viridula and Bemisia tabaci was produced in V2B3. The highest land equivalent ratio (LER) is achieved in V3B3 1.45. This present study shows that implementing Detap-1 with 6 rows of soybean is better than other treatment in the intercropping with corn.