【摘 要】
：
In China,the crop acreage using chemicalherbicides has now reached 53 millionhectares,over 10 times that of 1980.Theland needing herbicides increases by 2 mill
【出 处】
：
China Chemical Reporter
论文部分内容阅读
In China,the crop acreage using chemicalherbicides has now reached 53 millionhectares,over 10 times that of 1980.Theland needing herbicides increases by 2 millionhectares every year.Over 80 000 tonsof herbicide active ingredients are used inChina every year.By now,more than 100types of herbicides have been used in China.Among them,the top 20 accounted for
In China, the crop acreage using chemicalherbicides has now reached 53 million hectares, over 10 times that of 1980.Theland needing herbicides increases by 2 million hectares every year .Over 80 000 tonsof herbicide active ingredients are used inChina every year.By now, more than 100types of herbicides have been used in China.Among them, the top 20 accounted for
其他文献
选择了16种乔木、13种灌木和14种草本植物在江西省修水县古市镇花岗岩侵浊区进行了4年定位试验研究.对参试的乔、灌、草分别选取了反映植物适应性、生长状况、水保效益、固持
【正】 Sinochem Group and Statoil ASA signed Memorandum of StrategicPartnership in Oslo.This is another key cooperation agreementsigned between the two sides af
干旱是内蒙古最为频发、最为严重的气象灾害之一。针对这一事实，本文对利用气象卫星ＮＯＡＡ／ＡＶＨＲＲ资料遥感监测土壤干旱方法进行了研究。其主要内容有：提出了适用于极轨气象卫星资料的、可以
As 2005 dawned, the Chinese auto industry was in turmoil of price reductions. Whatwill happen during the year? There will be no radical change in the patter
应用同位素稀释技术和连续解吸方法测定了经过长时期培养的五种施磷土壤的活性磷库和有效磷的释放规律。结果表明,红壤、砖红壤对磷的吸附特征,以及活性磷测定的可靠性,都与
【正】 GCL-Poly Energy Holdings Limited (GCLPoly,HK: 3800) announced May 30th thatthe Changzhou wafer facilities with annualproduction capacity of 300 MW began
2005年4月12日,国家半导体照明工程研发及产业联盟借2005中国(厦门)半导体照明展览会之机首次亮相。同年的11月 17日,信息产业部半导体照明技术标准工作组正式成立。随着产业
The economic situation in China’s petroleumand chemical industry maintained ingood shape in April,as its production valueand output for major petrochemicals k
面对世纪之交频繁出现的沙尘暴,笔者对其发生的原因 、形成的 危害及防治对策进行了进一步分析和探讨。旨在使人们更深入地了解沙尘暴,把由其带来的 各方面损失降到最低限度
谐振电路的分析、计算往往因输入信号中谐波含量过大而难以精确进行。本文对电子镇流器负载谐振电路进行了理论分析 ,提出针对电子镇流器负载谐振电路的二阶段分析方法。在此