Giluminio dirvos purenimo įtaka dirvos fizikinėms savybėms

Abstract

Researches did in 2010 - 2011 years, industrial fields in 3 ha in Vilkaviskis r. Ramoniskiu vlg. at the farmer Vygintas Vilmaitis and in Pakruojis r. Moliunu vlg. at farmer Albinas Navickas. Solidity of the soil, the structure of the soil and its hardiness before and after doing the cultivating technological operation of the soil deepness. The aim of work is to set the influence of cultivated subsoil to physical features of the soil. Analyzing the structure of soil and research data of its hardness, we don't find essential differences. Optimal circumstances were established for winter rape sowing, growing. In both regions cultivation of deep soil decreased the hardness of plow sole. Decrease of hardness was fixed from 20-25 cm. By modeling researches it was established the difference of hardness of soil, between deep cultivated soil and uncultivated soil measure points in those depths: 15, 20, 25, 30, 35, 40 cm. Cultivation of soil plough in depth of 35 cm didn't have essential influence on hardness of deeper soil layers (from 45 cm).