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INTERNATIONAL BETWEEN SOIL COMPACTNESS AND FERTILIZERS APPLICATION IN WINTER WHEAT AND SOYBEAN GROWING
Anđelko Butorac
; Poljoprivredni fakultet Zagreb
Ivan Turšić
; Poljoprivredni fakultet Zagreb
Sažetak
The paper presents the results of two-year model experiments on four soil types (red soil, pseurdogley, brown soil on calcareous and alluvial soil), the aim of which was to study the effects of soil compaction and fertilizing on the yield of winter wheat and soybean. The results obtained for winter wheat are shown in Tables 2, 3 and 4, and those for soybean in Tables 5, 6 and 7. The results show that the increased compaction (above 1. 6) of pseudogley and brown soil on calcareous loss leads to a significant yield decrease in both winter wheat and soybean, the latter responding more drastically to the compaction increase. On the other hand, neither crop, when grown on red and alluvial soils, responded with any significant changes of the yield to changed soil compaction. With the exception of pseudogley in case of soybean, fertilizing had a significant effect on both crops on all the other soil types. Increased fertilizer doses resulted in higher yields. The less favourable effect of fertilizing on soybean grown on pseudogley, although there was a tendency to increased yields at higher fertilizer doses, can be explained by unfavourable physical properties of pseudogley for the development of the soybean root system. When evaluating the interaction of compaction and fertilizing on the yield of winter wheat and soybean, the prevailing effect of fertilizing becomes evident. This also applies to their individual effects. The results also indicate that excessive compaction cannot be compensated by intensified fertilizing. However, the combination of less compaction and higher fertilizer doses brings out their full interaction on the yields of winter wheat and soybean. Soil compaction is one of the acute problems of modern agriculture, so that there is an increasing need to determine optimal compaction for particular crops. This may be achieved by model experiments, both under controlled conditions and in the field, which enable measurable regulation of different degrees of compaction.
Ključne riječi
Hrčak ID:
165646
URI
Datum izdavanja:
20.9.1978.
Posjeta: 1.025 *