ABSTRACT
Climates are continually changing, albeit slowly and by small amounts. An account of any climate should not only include information about the average weather, but also details of the variations about such an average, both in frequency and in extent. The weather has an important, and sometimes a dominant effect on almost every agricultural operation and biological process. When considering the weather factors which limit production, it is necessary to know the range of conditions which are likely to be experienced. Initial attempts at agroclimatological analysis often suffer from the fact that temperature is a very obvious weather factor and that temperature data are the easiest to acquire. Accumulated temperatures can never be used to obtain reliable relationships of weather with crop yields with any great hope of success. The too rapid growth of grass in ideal weather conditions may lead to an imbalance in constituents, leading to nutritional disorders in animals grazing the otherwise excellent crop.
