Influence of weather and nitrogen fertilization on white clover percentage of permanent grassland.

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Abstract
On humus sandy soil little affected by moisture deficiency, and on compact river clay with somewhat lower water-table (40-180 cm) and occurrence of water deficiency during the summer months, herbage sampling during 1960-1966 showed that the percentage of Trifolium repens present in any month was significantly correlated with temperature and total radiation for the previous month. The mean clover percentage for a single season correlated significantly with mean April temperature. At temperatures common in April, growth of clover is considerably more affected by a rise in temperature than is that of the competing grasses Loliuni perenne and Poa trivialis. The clover percentage was unfavourably affected by N application but unaffected by precipitation or potential evaporation. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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