Influence of irrigation and cultivation system on production and economic effects of spring barley cultivation

In experiments carried out in 1997-2000 the influence of irrigation and cultivation system (organic, integrated and conventional) on the yield and economic effects was investigated. It was stated, that systems of intensity of cultivation increased the yields of grain but showed differences were larger under irrigation conditions. Irrigation, on the average for cultivation systems, increased the grain yield by 0.81 t/ha (24.5 percent). Productivity o 1 mm of irrigation water increased with increasing the cultivation intensity in systems. The most profitable, in both water wariants, turned out the cultivation according organic system. Irrigation, on the average for cultivation systems, increased the direct surplus, without diminishing its by irrigation cost, by 482 PLN/ha