2Bhowmik P C and Doll J D 1982 Corn and soybean response to allelopathic results of weed and crop residues. 1Altieri M A and Doll J D 1978 The probable of allelopathy as a instrument for weed administration in crop fields. 3Bhowmik P C and Doll J D 1984 Allelopathic effects of once-a-year weed residues on development and nutrient uptake of corn and soybeans. Quick online entry to all problems from