In a hybridization programme to study the genetics of resistance to bacterial blight of cotton within Gossypium herbaceum, a major gene, thought to be homologous with Knight's B9, was found in Wagad 8. The strain Chinese Indigenous was also found to possess a major gene for blight resistance but this gene was non-homologous with B9In addition genes there were strains of cotton. to the aforementioned major genes of small effect in both

1. Three experiments were laid down in Northern Scotland to examine the response to nitrogen and suitability for silage production of certain recommended Italian and Westerwolds grasses, some of which were accompanied by barley. In one experiment nitrogen inputs per acre were 122, 232, 342 and 507 units, and in the other two experiments 100, 200, 300 and 400 units.

1. Extracts containing hemicellulase activity were prepared from mixed rumen bacteria and Butyrivibrio fibrisolvens cells by mechanical disruption.