“Agricultural meteorology may be defined as ‘meteorology in its relation to agriculture.’ It considers the vegetation and animal life of the globe, the distribution of food and other crops, and farm operations as affected by climate. It shows the effect of weather on the growth and yield of crops. It treats of the influence of climate and weather on insect activities, the development of plant diseases, and the protection of crops, animal life, and buildings from damaging meteorological phenomena.”

Agricultural Meteorology by J. Warren Smith, MacMillan (1920)