Abstract:
The experiment was conducted at the Didactic Station of the „Ion Ionescu de la Brad” University of Agricultural
Sciences and Veterinary Medicine of Iasi, Ezareni Farm, during farming years 2007-2009. The experimental site is
located in the East part of Romania on a chambic chernozem, with a clay-loamy texture, 6.8 pH units, 3.7 % humus
content and a medium level of fertilization. The soil has high clay content (38-43%) and is difficult to till when soil
moisture is close to the wilting point (12.2%). We have investigated three variants of soil tillage system – conventional
tillage, minimum tillage and no-till – in the crop rotation made of wheat and raps. This paper presents the results
obtained in winter rape growing as concerns the influence of the tillage method on some soil physical characteristics
and yield.
Research carried out aimed at developing fundamental knowledge through in-depth inquiries of soil quality indicators
of Moldavian Plain, regarding integrated management of soil and water. Research carried out also aimed to quantify the
influence of agricultural technologies on physic, hydric, thermic, nutrient and biological soil regime, and ecological
impact of these changes on ecological, energetically, hydrological, biogeochemical and breathing soil function, in
specific areas of Moldavian Plain.
Tillage system modify, at least temporarily, some of the physical properties of soil, such as soil bulk density,
penetration resistance, soil porosity and soil structural stability. All the tillage operation was significantly different in
their effects on soil properties. The results indicate that soil tillage systems must be adjusted to plant requirements for
crop rotation and to the pedoclimatic conditions of the area
