The aim of this study was to evaluate different herbicides in corn-soybean intercropping for optimum growth, yield and nutritive value of forage under Korean environment conditions. Herbicidal treatments were randomly applied over five plots, viz. (1) Control treatment: no herbicide; (2) Alachlor; (3) Simazine; (4) Pendimethalin and (5) Mixture of alachlor and simazine herbicides in RCBD have three replications. Results depicted that treated herbicides exhibited significant effect over control of weeds. Simazine herbicide alone or mixed with alachlor had adverse effects on soybean but enhanced (p<0.05) corn production in terms of survivability, dry matter and digestible nutrients yield. Corn-soybean coupling and total dry matter yield were greater (p<0.05) in pendimethalin. Simazine-alachlor mixture reduced (p<0.05) soybean height. Conclusively, simazine could not be suitable for corn soybean intercropping because of having an adverse effect on soybean component. Pendimethalin could maintain growth and yield of corn and soybean both components. Effect of alachlor was comparable to that of pendimethalin.

• Dong Woo Kim(Department of Animal Science and Biotechnology, Kyungpook National University, Sangju, 37224 Republic of Korea)
• Yowook Song(Department of Animal Science and Biotechnology, Kyungpook National University, Sangju, 37224 Republic of Korea)
• Jeongtae Kim(Department of Animal Science and Biotechnology, Kyungpook National University, Sangju, 37224 Republic of Korea)
• Muhamad Fiaz(Department of Livestock Production and Management, Arid Agriculture University Rawalpindi 46300, Pakistan)
• Chan Ho Kwon(Department of Animal Science and Biotechnology, Kyungpook National University, Sangju, 37224 Republic of Korea) Corresponding author