如果考虑到农田杂草的空间分布，实际可以节约96.4%的农药。
If the spatial distribution was considered in field, around 96.4% herbicide could be saved.
选择不同开垦年限的农田，测其土壤理化性质，调查农田杂草种类状况。
The farmland reclaimed in different years are chosen to measure the physical and chemical properties of soil and to investigate the situation of weeds in farmland.
但是，化学除草在使用中存在许多问题，为此论述农田杂草防治应采取的措施。
But there are many problems in the use of chemical weeding so we should take synthetical measures to prevent and cure the weeds.
测试结果表明，该系统能够较准确地识别出农田杂草种类，并给出相应的防除方法。
The testing results show that the system can identify the weed and display the method of defending the weed exactly.
研究目的为了控制农田杂草，加速土壤残留农药降解，生产无公害农产品是非常重要的。
OBJECTIVE in order to control weeds in field and quicken degradation of soil rudimental pesticide, it is very important to produce non-public farm products.
农田杂草由开垦初期以多年生草本植物占优势到开垦多年以后以一年生草本植物占优势。
In the reclaimed farmland, the weeds dominated by perennial herbs in the initial stage of reclamation are replaced by the weeds dominated by annual herbs after reclamation for some years.
基于对农田杂草小蓟进行生物防治的目的，室内试验研究了环境条件对小蓟病原菌菌丝生长的影响。
For the purpose of bio-control of thistle in cropland, effect of environmental conditions on the mycelium growth of pathogenic bacteria of thistle was studied.
2003年，进行了农田杂草调查及防治技术研究，基本摸清了淮北地区农田杂草种类和群落分布。
Investigation on the weed species and control techniques were done in 2001-2003. Speices and community distribution of weed had been found in farmland in Huaibei area.
虽然我国农田杂草综合治理已经取得了长足进步，但杂草危害、演替、抗药性、除草剂药害等问题仍相当严重。
Although we have achieved great progress in the general control of the weed, there are also some serious problems in the harms of the weed, succession, drug-fast and the pollution of the herbicide.
利用植物化感作用防治农田杂草，可以减少化学除草剂的使用，减轻环境压力，降低生产成本，达到增加作物产量等目的。
Applying plant allelopathy to inhibit weeds can not only efficiently reduce the use of chemical herbicide and cost, but also protect environment and improve crop product.
农用是另一个方向，经过改造的“吃货”可以穿行在农田里，检查杂草和虫害，并将它们作为自己行驶时的动力来源。
An agricultural version might also navigate around farmland, checking for weed and insect infestations, and feeding itself as it went.
联邦调查局连续第二天在底特律郊区杂草丛生的农田搜寻这位前卡车司机协会会长的尸体，他的命运近40年来一直是个谜。
For a second day agents scoured an overgrown farm field just outside Detroit for the remains of the former Teamsters' boss whose fate has remained a mystery for nearly 40 years.
每年秋天大家都要认真地芟秋，这样可以防止农田中生长杂草。
Every autumn we carefully weed a field of crops and loosen the soil to prevent weeds from growing in it.
农田中灌木花粉含量低于荒地，杂草花粉类型比荒地丰富；
The percentages of shrubs pollen of farmlands are lower than that of wildlands, and weed pollens are more abundant.
此外，还叙述了保护性耕作对农田病虫害和杂草的影响。
Furthermore, the article recounted the effect of plant diseases and insect pests and weeds by the conservation tillage measures.
此外，还叙述了保护性耕作对农田病虫害和杂草的影响。
Furthermore, the article recounted the effect of plant diseases and insect pests and weeds by the conservation tillage measures.
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