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Robert Newton M Sc Ph D F R S C Chairman Professor of Field Crops
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acre Agropyron Alberta ammonium thiocyanate amount annual weeds appears applied areas arsenicals barium chlorate barley Bull calcium calcium chloride Canada thistle cereals certainly lethal dose chemical chloride competition compounds Compt concentration Cone copper sulphate crocks crop cultivated culture solution Cuso d1ys days after emergence destruction des mauvaises dosage Doubtful hazard Edmonton effect eradication experiments Expt field germination grain graminis grass Hannchen barley herbicides inches infestation Iron sulphate Kainit kill Landw Marquis wheat material mauvaises herbes method moisture mortality nitrate node obtained organic perennial weeds plants plots potassium regrowth relative humidity relative toxicity repens root systems salts samples sandy loam Saskatchewan sativum seedlings sodium arsenite sodium chlorate sodium dichromate soil soln solution Cultu1 solution solution Culture species Srr1y stinkweed sulphuric acid Table tests tion sprayed Toxir treated treatment untreated weed control weed seeds wheat wild mustard wild oats yield