TAILIEUCHUNG - Water Conservation Part 5

Tham khảo tài liệu 'water conservation part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Alternative Management Practices for Water Conservation in Dryland Farming A Case Study in Bijar Iran 51 the precipitation water is converted into snow. The soils of the region have low organic matter and nitrogen with medium amount of phosphorus and high potassium content. The soil had been cultivated since long time ago. The climate of the area is characterized by a cold and snowy winter and a warm and dry summer with high evapotranspiration potential in excess of 1500 mm in an evaporimetric tank . Experimental site and design Tillage treatments Three tillage treatments were imposed during seed bed preparation. The plot layout was arranged using a randomized complete block design with four replicates. Plowing operations were carried out in April 2003 and disking was performed twice in September of 2003. Tillage systems used were as follows Moldboard plow MP 200 mm depth and twice offset disking 70 mm depth . Chisel plow CP 300 mm depth and twice offset disking 70 mm depth . Deep plow DP with subsoiler 450 mm depth and twice offset disking 70 mm depth . The experimental design for each soil type was a spilt-split plot with three tillage systems as main plots manure applications no application application of 3 mm thickness of farmyard manure FM on soil surface after sowing and mix same amount of FM with the soil surface 70 mm depth before sowing as split plots and planting no planting and planting as splitsplit plots. Each plot size was 2 m X 20 m in four replications. Fertilizer including urea ammonium phosphate and microelements Zn Mn Fe and Cu were applied before sowing according to soil analysis results and recommendation rates. Wheat Triticum aestivum L. seeds cultivar Sardary were sown at a rate of 150 kg ha-1 and weeding was done manually. Runoff and soil loss Runoff and soil loss were measured in each plot. The plot edges were made of solid materials wood plank . The edges of the plots were about 15 cm above the soil surface to prevent input .

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