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Indian Journal of Weed ScienceYear : 2001, Volume : 33, Issue : 1&2 First page : ( 67) Last page : ( 68) Print ISSN : 0253-8040.
Critical Period of Weed Competition in Summer Cowpea [Vigna unguiculata (L.) Walp.]
Tripathi S. S., Singh Govindra
Department of Agronomy, G B. Pant University of Agriculture & Technology, Pantnagar-263 145 (Uttaranchal), India.