OPTIMIZATION OF SOIL AGROCHEMICAL INDICATORS UNDER THE CONDITIONS OF INTENSIVE FARMING
Keywords:soil agrochemical indicators, humus, total nitrogen.
The research was conducted in 2020–2022 in L. Macijauskas farm, Plokščiai, Šakiai district. The soil of the experiment was deep gleysol carbonaceous illimerised (Bathihypergleyi–Calc(ar)ic Luvisol) and carbonaceous stagnant illimerised (Calcari–Hypostagnic Luvisol) soil. The object of the research was soil agrochemical indicators. The aim of the research was to evaluate soil agrochemical indicators after increasing the number of members in crop rotation and applying intermediate crops and to identify soil agrochemical indicators after using different tillage methods. Soil agrochemical indicators were established by employing the following methods: soil pH – potentiometric method, humus – I. Tiurin method, total nitrogen – Kjeldahl method, mobile phosphorus and potassium – CAL method, organic carbon – Tiurin method. The results of the study showed that in most cases the minimum soil tillage technology compared with ploughing tillage technology had significant differences. After using the minimum soil tillage method, humus content was higher in both fields and had significant differences. The biggest content of total nitrogen 1,34 g/kg-1 was found after using intermediate crop and minimum soil tillage technology. After using minimum soil tillage technology and intermediate crops, it was noticed that the content of humus and total nitrogen had a tendency to increase