01204nam a2200205Ia 4500 CTU_190083 210402s9999 xx 000 0 und d 631.4 B748 Bot, Alexandra The importance of soil organic matter : Key to drought-resistant soil and sustained food and production Alexandra Bot, José Benites Rome Food and Agirculture Organization of the United Nations 2005 Soil organic matter - the product of on-site biological decomposition - affects the chemical and physical properties of the soil and its overall health. Its composition and breakdown rate affect: the soil structure and porosity; the water infiltration rate and moisture holding capacity of soils; the diversity and biological activity of soil organisms; and plant nutrient availability. This document concentrates on the organic matter dynamics of cropping soils and discusses the circumstances that deplete organic matter and their negative outcomes. Soil productivity,Năng suất đất Giang Trung tâm Học liệu Trường Đại học Cần Thơ