Role of harvest residues in agroecosystems
1998
Penu, P. (Estonian Agricultural University, Tartu (Estonia). Dept. of Soil Science and Agrochemistry)
Agroecosystems are considered as ecological systems with an agricultural component, characterized by withdrawal of products and the use of external inputs. Usually technology in agroecosystems over the world advances through further intensification, but during the last 4-5 years this process in the Estonian economical situation has developed on the contrary. The information of plant litter as after harvesting crop residues is a process frequently associated with input of energy and nutrients into soil and is the first step in the recycling of nutrients back to plants. Crop residues are a notable source of soil organic matter with effects on the bioactivity, fertility and productivity of soils and it can be considered a critical component in agricultural production systems. The main aims this research were: first- to estimate harvesting residues quantities and quality both from agronomical and economical viewpoint and second- to describe the changes and their reasons in agroecosystems during the 4 years and third- to compare harvest residues in different soil groups
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