论文部分内容阅读
１提出问题２假设３试验设计问题局限性提出人选择抗虫棉后期早衰可试验张新华√棉花玉米螟尚无有效防治方法张美林×概念概念来源农民对概念的看法选择重视有机肥科教书需试验√改良土壤科教书难度大，不现实×及时抗旱技术资料缺水源×试验田选择在张新华棉田，棉花品种为GK
1 Ask the question 2 Hypothesis 3 Limitations of the test design problem Proposed candidates to test the early stage of pest-resistant cotton can be tested Zhang Xinhua √ Cotton maize borer is no effective control methods Zhangmei Lin × Concept Concept Source Farmers on the concept of choice of emphasis on organic fertilizer Teaching to be tested √ Improved soil textbook difficult, unrealistic × Timely drought technical information Water shortage × experimental field selection Zhang Xinhua cotton fields, cotton varieties GK