THE YIELDING OF PEA (Pisum sativum L.) UNDER DIFFERENT TILLAGE CONDITIONS

Productivity of plants is determined by multiple factors that directly affect one another, therefore yield variability may be high and difficult to predict. Most often, however, a lower crop yield is achieved in the no-tillage system than in the ploughing system. The reported study evaluated the yielding of pea under conventional (ploughing) tillage (shallow ploughing and harrowing after harvest of the previous crop, ploughing in the autumn), reduced tillage (only cultivator after harvest of the previous crop) and herbicide tillage (only Roundup 360 SL after harvest of the previous crop). The highest pea yield was achieved in the conventional tillage, whereas a lower one - by 40.8% - in the herbicide tillage. The conventional tillage system increased the number of pods per 1 m(2), the number of grains per 1 m(2), and grain weight per plant, compared to the herbicide tillage. The yield of pea was correlated with pod number per 1 m(2), grain number per 1 m(2), grain weight per plant, and plant number per 1 m(2). Correlations were also confirmed between pod number per 1 m(2) and grain number per 1 m(2), as well as between plant number per 1 m(2) and pod number per 1 m(2), and between plant number per 1 m(2) and grain number per plant.