The drought was most severe in the south of the country, but had serious effects in all areas. The dry summer of 1975 followed by an unusually dry winter resulted in the majority of the country having a soil moisture deficit in May 1976. Crop production was affected both directly and indirectly through the build up of certain pests and diseases favoured by the weather. Grassland production was severely restricted and some young leys killed out. Live-stock remained remarkably fit, but milk yields fell and lambs and grazing cattle took longer to fatten. Supplementary feeding of hay, straw and concentrates was necessary. Some cases of poisoning resulted from stock foraging for food where pasture was bare, and poor quality water supplies caused problems. There were losses of sheep, pigs and calves due to high temperatures. Longer term effects of the drought include an enhanced persistence of soil acting herbicides and residues.