Interaction between irrigation and soil cultivation in maize production
1996
Nagy, J. (Debreceni Agratud. Egyet., Debrecen (Hungary))
The effect of irrigation and soil cultivation was evaluated by means of variance analysis from the annual and average results obtains between 1989 and 1994 in a long-term experiment set up in the field nursery of Debrecen Universtiy of Agricultural Science (Hungary). The results of variance analysis showed irrigation and soil cultivation to be in close correlation with the yield. The effect of irrigation differed greatly depending on the natural water supplies, but was significant in all the years tested. The interaction between soil cultivation and irrigation was also significant expect in 1991, when the yields did not differ significantly from each other thanks to the plentiful rainfall supplies. In the present experiments winter ploughing was the best soil cultivation method in both irrigated and non-irrigated treatments. The results prove that on chernozem soil, provided rainfall is at least average, winter ploughing helps in the development of favourable soil status and thus substantially increases the yield of maize. Averaged over the experimental years, spring ploughing without irrigation did not differ significantly from minimum tillage. In dry years, however, the water retaining effect of minimum tillage made it significantly more favourable than spring ploughing
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