the effect of tillage systems and press wheel weights on dry land wheat grain yield in khuzestan province
نویسندگان
چکیده
tillage and press wheel weight play an important role in seedling emergence, crop establishment and growth. an optimal combination of tillage implements and suitable press wheel weights should increase grain yield. this study investigated the effect of tillage systems and press wheel weights on dry land wheat (triticum aestivum l.) seedling emergence and grain yields in izeh, khuzestan province. cone index and emergence rate were also recorded. a split factorial complete block design was applied with four tillage treatments including no-tillage, conventional tillage (moldboard plow + disk) and reduced tillage (two disk passes, chisel plow + disk). the seeding treatments included independent and two-axle press wheel drill at three levels (4, 5 and 8 kgcm-1) of press wheel width. the results indicated that reduced tillage (two disk passes) produced a higher and faster rate of emergence and the highest grain yield (1961.7 kgha-1). the independent press wheel drill decreased the cone index and increased the seedling (28%) and rate of emergence (54%) more than other treatments. this seeding machine yielded 2202.9 kgha-1 grains with greater 1000 grain weight compared to other planters. the results suggest that reduced tillage (two disk passes) and the independent press wheel drill are more effective than other treatments (p≤0.01) for wheat production under the dry land conditions similar to those of izeh.
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عنوان ژورنال:
تحقیقات مهندسی کشاورزیجلد ۱۱، شماره ۱، صفحات ۱-۱۸
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