The feasibility of reducing yield gap by improving crop management


H. Fateh, A. Toube, A.Q. Gholipuri

An appropriate solution to increase crop production is to improve production per unit area. Reconsiderations are, therefore, necessary in various agricultural systems and their production potential. To evaluate agronomic factors affecting crop yield and feasibility of reducing wheat yield gap, a questionnaire was developed in terms of yield-affecting management factors. For this purpose, data of most important factors affecting wheat yield were recorded from farmers sampled from different parts of Piranshahr, a southern city in West Azerbaijan province, Iran. The results showed that the management applied throughout the season had a significant effect on wheat yield. The lands with more than three hectares, flat, and northward with loam-clay soil texture yielded relatively higher crop. The yields were also higher in the lands plowed in March and August with a three-plough moldboard connected to a four-cylinder Ferguson tractor, flattened using a trowel, and rotated with fallow and pea. The use of phosphate (100-150 kg ha−1), potash, and micro fertilizers, as well as 100-150 kg of urea (50 kg in spring and 50 kg in autumn) led to increased yield. The use of Granstar (60 g) and 1.0 L of 2, 4-D separately, and 0.5 L of a pesticide resulted in a better seed yield. Harvesting of wheat in July 15-25 using Hyundai and 130k combines resulted in higher yields. The percentages of studied managements, including land characteristics, planting, growing, and harvesting in wheat fields were 13, 35, 27, and 25 percent, respectively.

Keywords: Wheat; yield; crop management; fertilizer; Iran

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