The authors wish to thank the Chairman and Members of the Board of Directors of the Cyprus Grain Commission, the Director of the CGC, and the engineers, storekeepers, technicians, workers and other colleagues of the CGC for their support and assistance. Special thanks are extended to Mrs A. Eliadou and Mr A. Antoniou for the many thousands of analyses they carried out. Warm thanks are also extended to Dr Popi Kanari, Dr Eleni Kakouri and Dr R. Argyrides, of the General State Laboratory, Mr S. Xenofontos, of the Seed Production Centre, and Dr P. Hadjigeorgiou, of the Chemical Laboratory of the Dept. of Agriculture, and to their staffs.