Zedan, G. J., Ali, O. N., & Salih, Z. K. (2010). EFFECT OF ORGANIC FERTLIZER AND INTERCROPPING FOR COWPEA (Vigna sinensis) AND SWEET CORN(Zea mays var. regosa ) IN GROWTH , YIELD AND LAND EQUIVALENT RATIO ( LER ). Diyala Agricultural Sciences Journal , 2(1), 138–151. Retrieved from https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/3144