RESPONS KEDELAI TERHADAP PEMBUANGAN DAUN TEBU DAN PENYIANGAN GULMA PADA SISTEM TUMPANGSARI TEBU- KEDELAI DI LAHAN TEBU [RESPONSE OF SOYBEAN TO REMOVAL OF SUGER CANE LEAVES AND WEEDING IN SUGER CANE-SOYBEAN ITERCROPPING SYSTEM IN SUGAR CANE AREA] - Arofik, Zainul (Universitas Muhammadiyah Jember, 2017)