杂草控制

Secondly, before reseeding white clove and cocksfoot firing disposal should be done to the main weed and the dead substance on pasture in June.

18.1 提高牧草生长速率的有效优化调控技术是：第一，7～10月牧草生长旺季适当增加载畜量；第二，6月份对草地主要杂草和死物质进行火烧处理，然后补播白三叶和鸭茅；第三，6月初雨期撒施钙镁磷肥、尿素；第四，实施划区围栏，有效控制放牧面积；第五，每年5—10月刈割杂草；第六，适度减少人工草地中非洲狗尾草和狼尾草的比例或予以清除；第七，在与常年风向垂直的地段建植防护林带。

Nutrient components of sweet potatoes with weed management in organic cultivation was better by intercropped soybean. Crude protein, reducing sugar and starch were better with thrice intertillage. Nutrient components of sweet potatoes with different mulch was better by peanut shell.

不同方式控制杂草对甘薯营养成分之影响试验中，四种不同绿肥间植，以绿肥大豆在各成分中表现较佳；四种耕犁次数控制杂草试验，三次耕犁对粗蛋白、还原醣及淀粉有较佳之表现；四种敷盖物以花生壳对各种成分有较佳之表现。

Weed control requires treatments specific to the type of weeds you may encounter; broadleaf weeds like Dandelion, for example, are best treated in the late fall.

杂草控制需要处理特定于您可能遇到的杂草种类；像蒲公英阔叶杂草，例如，最好在晚秋处理。

The spraying control system aiming at weed based on machine vision was designed and developed. The index of 2G-R-B is used for segmentation and the method of improved pixel lateral histogram is used for extracting the center of crop row,the method of threthold is also used for identificating between-row weed and BP ANN based on fratal and texture is used for identificating in-row weed. PLC correspondence and performing procedure is desi -gned and developed.

设计和开发了基于机器视觉的麦田除草剂对准喷药控制系统，该系统的视觉子系统首先用过绿的2G-R-B进行植物与土壤背景的分割，其次用改进像素直方图法识别作物中心行，用阈值法识别行间杂草区域，用BP神经网络基于分形和纹理的共同特征识别行内杂草区域，设计并开发了计算机与PLC的通信程序，设计了PLC的运行程序。

Statistical Package for the Social Science was adapted for descriptive statistics, analysis of variance , test of independence, and spearman correlation, to explore the efficiency of organic rice farm management in Taiwan.

农场经营者对病虫害防治技术、杂草控制、市场资讯和行销等专业技术，仍需要农政单位与验证机构之协助与辅导。经与惯行栽培比较，显示水稻有机栽培，虽然肥料费用高於惯行栽培大约3倍，但因稻谷售价较约高出2倍。

Compositive control measurement of weedy rice based on prevention and cultivation should be applied.

应采取预防和耕作栽培措施为主的杂草稻综合防治措施对杂草稻进行积极的控制。

The main achievements of the project are as follows: 1 the hypothesis that a decrease in seed mass causes an increase in mean dispersal distance has been tested based on the experiments of weed dispersal by wind. The experimental results partly support the hypothesis. The results will help farmers to make an optimal strategy of weed control; 2 a statistic method for inferring probabilistic distribution function of a random variable has been developed, by which probabilistic distribution functions of weed species dispersal have been determined; 3 the reproduction structure of Bromus sterilis has been studied; 4 a more complex CA model with 25 neighborhood cells were built, which can simulate spread of a weed population. This work promotes developments in both theory and application of CA models; 5 the "mean law" in weed control has been proposed. Accordingly, the algorism of patch spring may be calibrated; 6 the "patch" and "true patch" have been mathematically defined so that herbicide can be efficiently applied; 7 simulation validates that initial configurations of weed will affect dispersal of its population and strategies of controlling it, or its distribution patterns affect its dispersal progresses.

主要完成的工作和取得的成果有：1）用实验证实了重量较轻的杂草种子并不一定飞得比较重的远，其结果有助于农民制订杂草的优化控制策略；2）发展了一种推断随机变量分布函数的统计方法并用它来获得了几个杂草种的扩散分布函数；3）对杂草Bromus sterilis的繁殖结构进行了研究；4）建立了一个具有25邻的较复杂的能模拟杂草扩散的CA模型，并在理论和应用方面促进了CA模型的发展；5）在杂草控制方面提出了&平均法则&，据此可对按块施药方法进行校正；6）精确地定义了&块&和&真块&以便在杂草控制中能更有效地使用除草剂；7）模拟证实杂草种群的初始配置影响其扩散和控制策略，或者格局影响过程。

Many crop and soil scientists go into some area of public service, or work as seed inspectors, operators of weed control services, park and recreation directors, golf course superintendents, or managers of grower organizations.

许多作物与土壤学家都进入了公用事业的诸多领域，或者担当种子检验员、杂草控制服务中心的工作人员，公园和娱乐场所的管理人员、高尔夫球场的主管人员、或者种植组织的经理。

And effects of water regime and herbicides on its emergence and growth.

的生物学特性和探索杂草稻的有效控制技术，开展了杂草稻落粒粳的防治研究。

It therefore implies that white clover intercropping and straw mulching are effective ecological weed control measures.

结果表明两种生态控草处理措施能改变茶园杂草群落结构，有效控制杂草的生长。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。