TY - JOUR AU - Lange, A. H. AU - Fischer, B. B. AU - Hoover, R. TI - Herbicide residues under different cultural practices JF - California Agriculture JO - Calif Agr Y1 - 1971/02/01 VL - 25 IS - 2 SP - 13 EP - 14 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v025n02p13 AB - THE RESIDUAL CHARACTERISTICS of common herbicides in California have been studied for over seven years at various locations throughout California from Tulelake in the north to El Centro in the south. The many differences in crops, soils and climates, cause great differences in the length of time soil-applied chemicals remain active.