engleski

Maize yield variation among the years in the eastern Croatia

Considerable variation of maize grain yields in the Eastern Croatia among years for 30-year (1961-1990) period and for 1996-2003 period were found. Increased yield trends for long period is possible to explain by improvement of crop and soil management practices as well as creating of high-yielding hybrids. Affected by soil characteristics, higher grain yields of maize were found in the eastern part of the region compared to its western part. For example, mean grain yield of maize in the former Vukovar and Podr. Slatina municipalities were 6.00 and 4.14 t ha-1, respectively. Weather differences among individual growing seasons are more responsible factor of maize yields for a short period. For example, in the three more favorable seasons (MFS=1982, 1984 and 1986) mean maize yield in the region totaled 6.69 t ha-1, whereas in the three less favorable seasons (LFS=1978, 1980 and 1988) it was 5.11 t ha-1 or 24% lower. The amount of precipitation for 4-month period (May-August) was lower in the LFS (3-year means for four localities: 285 and 237 mm, for the MFS and LFS, respectively), whereas precipitation in July was 40% lower (65 and 40 mm, respectively).

maize ; yield ; Eastern Croatia ; year influences

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