Evolution of chernozems leached quality under intensive agriculture in central zone of Moldova
Published in Scientific Papers. Series A. Agronomy, Vol. LV-2012
Written by Tamara LEAH, Nicolai LEAH
Studying the evolution of chernozem leached quality with whole profile used in intensive agriculture based on fertilization systems in field crop rotations in 1965-2010 period established, that arable leached chernozems is characterized by satisfactory values of the physical, chemical and biological properties. As a result of 45 years intensive used in agriculture the leached chernozems are affected by: dehumification of arable layer, caused by insufficient flow of organic matter in the soil; compaction of arable layer as a result of soil tillage; and soil destruction. Influence of mineral fertilizers in doses of N60-120PK after a period of 10 years of farming land without fertilizers (19942004) did not lead to significant change of physical, chemical and agrochemical properties of soils. Quality status of leached chernozems should be maintained by administration of organically and mineral fertilizers in recommended optimal doses, shredding and incorporation in the soil the vegetal crop residues and secondary production, respecting crop rotation with introducing alfalfa and increasing surface of leguminous crops by 20-25 %; application of agrotechnical measures and mini tillage: cracking the depth of 35-40 cm tillage depth alternating with periodic raising the surface of the compacted layer.