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Using simulation to assess climate-change strategies for global participation A Preliminary Survey on Forest Sustainable Cutting The optimal control rate of regional emission reduction targets under the constraint of quotas Potential of purifying SO2 of main tree species and their planting quota in Shenyang area Fuzzy model for grape sugar content and fruit shape index with irrigation quota as parameter Effects of irrigation quota on yield and quality of summer-sown, naked oat EFFECT OF IRRIGATING QUOTA ON WTEAT YIELD, TOPDRESSING EFFICIENCY AND ITS LOSS