On the basis of research done in the Department and literature data, indicesof optimal precipitation and water needs of selected crops (cereals, root plantsand papilionaceae) have been determined. It was found that both insufficient andexcessive precipitation affected yield adversely. It caused the following decreasesin yields: cereals 2-27 and 3-21%, potato 4-45 and 3-30%, sugar beetroot 2-43and 14-19%, fodder beet 16-73 and 8-28%, legumes 5-42 and 21-40%, and papilionaceae3-34%, respectively.Productivity of 1 mm water from precipitation was higher compared withproductivity induced by sprinkling. The calculated index of productivity for waterfrom sprinkling relative to water from precipitation was in the range 40-90%.Sprinkling increased the yield of winter wheat and spring barley by 20%,spring wheat by 25%, potato 47 and 55%, and sugar beet 10-40%. ...
Two field experiments were strict founded in 2004-2006 on a farm in Chlebówek. Locality is 20 km from Stargard and 5 km north-east of the village commune old oak wood - 53027'N and 15010'E. In the experiments, the effect of irrigation, tillage system and fertilization on yield and selected parameters of the physical properties of the soil. We tested two varieties of faba bean: The conducted experiments show that the use of irrigation and increasing doses of mineral fertilizers increases the yield of faba bean seeds of both varieties, traditional - 'Nadwiślański 'and modified -'Titus'. The use of simplifications tillage reduces, to a greater extent, yielding traditional varieties of faba bean. Increased mineral fertilizers under field irrigation increased water consumption, and thus decreased the supply layer to 50 cm. Improving water logging top soils decreased soil bulk density in a variation of 'Nadwiślański' and increased the variety 'Titus'. The use of simplified tillage systems, especially direct sowing, increases the bulk density of the upper layers of the soil. ...
