1. 2Anon. (1938 ). Soil sterilisation with chloropicrin for field crops and vegetables .Report of Rhode Island State College Agricultural Experiment Station, pp.25 -26 .
2. 3Anon. (1939 ). Field soil treatments with chloropicrin .Report of Rhode Island State College Agricultural Experiment Station, pp.40 -41 .
3. 4Anon. (1972 ). The effect of dazomet on clubroot .Research Investigations and Field Trials1970-71.Report. West of Scotland College of Agriculture, p.79 .
4. 5Anon. (1973 ). Trials and Experiments .States of Jersey Department of Agriculture, Report on Advisory Services and Howard Davis Farm, pp.20 -21 .