Some knowledge from long-term irrigation of main agricultural crops under heterogenous conditions in the Vychodoslovenska nizina Lowland, Slovakia
1994
Tkac, J. (Vyskumny Ustav Zavlahoveho Hospodarstva, Bratislava (Slovak Republic))
From the stated survey one may consider that the soil water deficit in corn maize and sugar beet, especially during periods demanding on water, shoud fluctuate in the range of levels between 60-70 % of available water capacity and shoud not fall under the limit of 40 % of available water capacity. In most cases this applies also to other irrigated crops (stubble mixtures and catch crops). Perennial fodder crops and grasses are among the crops most demanding on water. The irrigation season of these crops keeps on during the whole growing season. It turned out that winter wheat on heavy soils responded to irrigation water especially on those fields where subsoil ploughing into the depth of 0.50 m was carried out before the actual soil cultivation (disc harrowing) after harvesting the previous crop. In the case of winter wheat, irrigation depth of 90-100 mm generally must be taken into account, and when necessary, also the application of pre-vegetational irrigation is recommendable
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