搜索结果: 46-56 共查到“知识库 种植业经济学”相关记录56条 . 查询时间(1.756 秒)
Profit-Maximizing Nitrogen Fertilization Rates for Alternative Tillage and Winter Cover Systems
Profit-Maximizing Nitrogen Fertilization Rates Winter Cover Systems
2008/12/9
Cotton (Gossypium hirsutum L.) producers interested in adopting winter cover crops need information about profit maximizing N fertilization rates. This study evaluated how alternative winter covers af...
Soil- and Foliar-Applied Boron in Cotton Production: An Economic Analysis
Soil- and Foliar-Applied Boron Cotton Production Economic Analysis
2008/12/9
Boron deficiency in cotton (Gossypium hirsutum L.) may be corrected with foliar or soil B applications, but a thorough economic analysis of soilversus foliar-applied B has not been done. The objective...
The Impacts of U.S. Cotton Programs on the World Market: An Analysis of Brazilian WTO Petition
U.S. Cotton Programs World Market Brazilian WTO Petition
2008/12/9
This manuscript analyzed the effects of the elimination of U.S. cotton subsidy programs on the world cotton market using a partial equilibrium model of the world fiber market. Removal of U.S. programs...
Starter Fertilizer, Additives, and Growth Regulators in Cotton Production: An Economic Analysis
Starter Fertilizer Additives Growth Regulators Cotton Production Economic Analysis
2008/12/9
Data from field research conducted in 1996 and 1997 on a Loring silt loam (fine-silty, mixed, active, thermic, Oxyaquic Fragiudalf) were used for economic evaluation of plant growth regulators and fer...
Transgenic Cotton Cultivars: An Economic Comparison in Arkansas
Transgenic Cotton Cultivars Economic Comparison Arkansas
2008/12/9
The development of transgenic cotton cultivars gives cotton producers more options for controlling pests. The value of these cultivars to producers depends not only on the cost-savings that they may c...
Using a Moving Average to Determine Cotton Futures Market Entry Dates
Using a Moving Average Determine Cotton Futures Market Entry Dates
2008/12/9
A persisting question in using the cotton (Gossypium hirsutum L.) futures market to increase the net price received is that of determining the time to place hedges. The objective of this research was ...
我国经济政策研究方法和体制有待改进——“我国棉花经济和政策研究”简报之七
经济政策
2008/1/14
我国现代意义上经济政策研究是在改革开放背景下发展起来的。过去二十年来，我国经济政策研究的广度和深度不断拓展，研究学术水平不断提高，大量研究成果对科学决策以及推进经济改革发展发挥了不可低估的积极作用。另一方面，随着我国经济生活市场化和国际化程度加深，经济运行复杂程度增加，对政策研究科学化和规范化也提出了更高要求。因而，应当改进我国经济政策研究方法和体制以适应形势发展需要。本文侧重依据棉花政策研究个案...
粮价上涨的前因、后果和调控
粮价上涨 调控
2007/12/26
进入2006年11月，粮价突然开始上涨。根据国家统计局的数据，11月粮价上涨4.7%；另据中国人民银行的数据，12月粮价上涨3.6%。此番粮价上涨引起了政府和社会各界的广泛关注，那么，如何认识这一轮粮食涨价，如何做好2007年的政府调控，本文提出了以下几点看法。
第一，目前粮食整体价格水平并不高。认真分析最近几年全国主要粮食批发市场的平均价格走势发现，目前小麦的价格水平仍然不及2005年初的...
由于雷达遥感的全天候、全天时的优势，使之成为南方大范围农业信息动态监测的最佳遥感手段。为了适宜于运行系统，本研究采用加拿大雷达卫星（RADARSAT）窄波扫描模式（SNB）数据，以广东省为例进行了大范围水稻估产。通过建立稻作图谱，解决了在地形复杂、农业集约化程度低、水稻田分布不规则，且地块间田间管理水平差异很大等诸多因素影响下的水稻信息提取问题；在野外观测站采集的水稻生长期生理生态数据的基础上，建...