主要农作物

• In addition , we continued the minimum purchase price policy for key grain varieties in major grain - producing areas and increased transfer payments to counties and townships with financial difficulties and major grain - producing counties
  另外，我们继续执行多种主要农作物最低购买价格政策在财政困难的农村和城镇主要农作物生产区增加运输费用。
• They are an agrarian society that grows beans , corn , cotton and squash as their primary crops , causing modern scientists to marvel at how the hopi have managed to grow so much out of such a dry , unforgiving terrain
  他们是一个农业社会，豆子玉米棉花和南瓜是他们的主要农作物，这使当代的科学家惊叹霍皮人怎么能在如此乾旱不仁的地带种植这么多东西。
• Soybean , as the major crop in northeastern china , is the main source of peasants " income . according to an investigation made in producing area , price change has a great impact on peasants " revenue
  大豆作为我国东北产区主要农作物，是农民收入的重要来源，根据对产区的调查，大豆纯收入一般占农户纯收入的五分之之，大豆价格的变化对农民的收入影响极大。
• The paper will briefly reviews the basis of the grain reform policy and then analyzes the historical process in the change of the agricultural structure . after econometrical analysis on the effects of the reform and the cost - based comparative analysis on the advantage of the main crop in zhejiang province , we conclude with some advice on optimizing the agricultural structure in the district
  本文在简单回顾与评述粮改政策的基础上，分析了浙江农业结构变化的历史进程，并通过计量经济学方法探讨了粮改对农业结构调整的影响程度，以及基于成本比较分析了浙江主要农作物的国内和省内区域优势。
• The potential productivities of photosynthesis , the potential productivities of the light and temperature , the potential productivities of the light , temperature and water in the state of nature , the potential productivities of the light , temperature , water and soil in the state of nature , the potential productivities of soil regulated by irrigation of the main crops were analysed and calculated
  摘要本文针对阿拉尔垦区主要农作物的光合生产潜力、光温生产潜力、天然状态下光温水生产潜力、光温水土生产潜力及灌溉保证下的土壤生产潜力进行了计算和分析。
• The conflict of water consumption between industry , agriculture and living is becoming sharp in suburbs of beijing . based on case study in shunyi county , water requirement and water use efficiency of crops in the region were studied through onsite experiment and typical household survey . on the ground of analyses of the sustainability of regional water resource balance , the trend of water use in the future was projected in this paper
  本研究针对北京城郊地区工业、农业和生活用水矛盾日趋突出的现状，以北京市顺义区为典例，通过定位试验和典型调查，对该地区主要农作物的需水量和水分利用效率进行了研究；通过分析区域水资源的平衡利用状况及其可持续性，对未来种植业需水状况进行了预测，并探讨了该地区节水型种植业结构及模式的优化方案。
• On the basis of investigating and analyzing the major targets of agriculture resources , environment , economy and society , etc . of shandong province , through surveying the superiority index of major crops in this region , this paper finds out the comparative superiorities of regional plant industry of shandong province and the superior type for regional development ; puts forward several countermeasures for promoting the development of plant industry in shandong
  该文在对山东省农业资源、环境、经济和社会等主要指标调查分析的基础上,通过区域主要农作物优势指数测算,得出了山东种植业区域比较优势和区域发展优势类型,并提出了加快山东种植业发展对策措施。
• Based on theory of comparative advantage and competitive advantage , the method of aggregated advantage indices will be used to analyze the comparative advantage tendency of main crops in shanxi and competitive advantage in each region in shanxi . the research result will be basis of policy of adjusting of plantation structure and optimizing of region ' s structure in shanxi
  本研究主要以比较优势和竞争优势理论为依据，运用综合比较优势指数法对山西省主要农作物的比较优势变动趋势和各主要作物在各地区的竞争优势变动趋势进行实证分析，从而为山西省种植业结构调整和地区合理布局提供客观依据。
• Chapter iv tells the history and real condition of chinese agricultural extension system . in the first place , it looks back on the development of chinese agricultural extension ; in the second place , it analyses the economic benefit of agricultural extension in the eye of economics ; in the third place , it introduces chinese agricultural extension organizations now available ; in the fourth place , it points out the problems of the present agricultural extension system ; in the fifth place , it shows the developing trend of agricultural extension . chapter v focuses on the effect that farm households " using technology has on agricultural extension mechanism
  一、回顾中国农业技术推广发展的历史；二、从经济学角度分析农业技术推广的经济效益；三、概述中国目前的农业技术推广组织：政府主导型、农村专业技术协会型、农业企业型以及农业教育和科研型；四、剖析当前农业技术推广体系存在的问题：农业技术推广运行机制与市场不协调、缺乏明确分工；重技术推广、轻素质教育；重科研、轻推广；技术需求与技术供给相脱节；农业技术市场发展滞后；五、概括农业技术推广体系的发展趋势：推广组织多元化、推广内容综合化、推广方式多样化、用户导向性加强、推广法制化以及主要农作物的技术推广依旧依赖政府推广组织。
• Based on the analysis of crop structure and crop yield according to the statistic data in 1949 ~ 2000 year . the total water consumption of main crops and the amount of rainwater utilized have been calculated . the rapid increase in water demand for crops production after the late eighties is the one of main reasons of the water resources crisis in baoding area . the efficient precipitation , the water demand and the deficiencies of main crops in different typical years and in different growth period in baoding plain have been studied in detail . the factors of water use efficiency of different crops have been put forward through the analysis of test data in typical year
  本文利用保定市1949 2000年主要农作物的种植面积与产量统计资料，在分析了历年种植结构变化、单产变化的基础上，明确了历年粮食总产变化情况，计算了历年粮食生产的总需水量及其变化；根据农作物的雨水资源的变化规律，分析了历年用于粮食生产的有效降水量；得出了保定市农业用水量从90年代中后期大幅度增加而有效降雨量的明显减小，是造成保定市水资源供需矛盾突出的主要原因之一。