During 2008-2010, the field trial with pea variety Dunaj was carried out after wheat forecrop in years. The experimental site of Slovak Agricultural University in Nitra is located in south-western Slovakia (E 18º09', N 48º19') with altitude of 175 m above MSL. The location has continental warm and moderate arid climate with an average annual temperature of 9.07°C an average annual precipitation of 561 mm. The mean temperature during the growing season is 16.2°C. The soil type is Orthic Luvisol with a loamy texture, medium humus content of 1.95%-2.60% and a pH of 5.7.There were three tillage treatments (O1-medium deep ploughing to 0.24 m, O2-shallow ploughing to 0.15 m, O3-disc tools to 0.12 m and fertilization treatments H1-control treatment, H2-inorganic fertilizers (P and K on yield 3 t ha-1), H3-inorganic fertilizers and incorporation of forecrop residues. Grain yield of pea was highly significantly influenced by the year, tillage and fertilization. The highest seed yield of 4.27 t ha-1 was in the wet year 2010. Lack of humidity supported only 2.15 t ha-1 in 2009. Mouldboard ploughing has created significantly the most suitable condition with average yield in shallow ploughing (3.01 tha-1) and in medium deep ploughing treatment (2.98 t ha-1). Fertilization treatments significantly influenced the yield by application of inorganic fertilizer (3.08 t ha-1) and by combination of inorganic fertilizers and incorporation of forecrop residues (2.99 t ha-1) with comparison to control treatment (2.74 t ha-1).On the base of correlation analysis the highly significant direct relationship between yield and number of pods per plant (r=0.77++), and TSW (r=0.60++) was determined. Year condition related to the plant density of crop (r=0.43++) and number of pods per plant (r=0.51++). No relationship between fertilization treatment and yield component was found. Indirect relationship between plant density and number of pods per plant (r=0.33++) and TSW (r=-0.64++) respectively but plant density and number of seeds per pod revealed high relationship (r=0.59++). Indirect relationship between number of pods and number of seeds per pod (-0.52++) and between number of seeds per pod and TSW (r=-0.83++) was also determined.

common pea, tillage, fertilization, yield

Presentation: oral