A conservation experiment is described in which a comparison is made of quality and of nutrient losses in long and lacerated silages of warm fermentation type made in large lined trench silos. High losses of 29.5 and 34.7% of the dry matter in the long grass silages and 32.8 and 32.4% in the lacerated silages were recorded. Losses of starch equivalent were correspondingly high amounting to 43.3 and 49.5% in the long grass silages and 49.1 and 46.5% in the lacerated silages. The mean loss of dry matter in the effluent from the lacerated silages was 1.3% higher than in the long grass silages.

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

A conservation experiment is described in which a comparison is made of quality and of nutrient losses in wilted and unwilted lacerated silages made by the cold fermentation process in large trench silos. The losses of dry matter in the two wilted silages were 19.7 and 16.7% and in the unwilted silages 23.3 and 22.1%.

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.