Controlled Climate and Plant Research

作者：Robert Jack Downs, Henry Hellmers · 发表于：Secretariat of the World Meteorological Organization eBooks · 年份：1976 · 被引用次数：20 · 研究领域：Plant Ecology and Soil Science

Man has not quietly adapted to the existing climatic conditions of his agricultural land. Instead, he has altered these conditions by clearing the land of unwanted species, controlling weeds, increasing soil fertility and providing water by means of irrigation. Man has also been actively developing varieties which are better adapted to various environemnts.