EVOLUTION OF SOIL ATTRIBUTES IN CONSERVATIVE AGRICULTURE

Abstract

Results are presented obtained in an experiment carried out in conservative agriculture system in which chemical fertilizers assortments were tested in N, NP, NPK, and NPK with potassium humates matrix. Doses of 0; 50; 100; 150; and 200 kg N/ha were applied. The experiment was placed on a Haplic Phaeozem^[1] at SCDA Teleorman and the test plant was soya. The evolution of soil physical and chemical characteristics was aimed at. Soil samples were collected on the 0-20 cm depth. It was ascertained that soil works in conservative agriculture system didn`t lead to changes in the total cation exchange capacity, exchangeable bases sum, and base saturation degree. The latter had a decreasing tendency,  from 88.6-90.6% to 85.8-88.5%, but not statistically ensured. Mobile forms of phosphorus and potassium had very significant increases in the variants treated with NP, NPK matrix fertilizers. Total forms remained constant.