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- Sometimes the preliminary step must be taken of reducing weed population before fertilizing. 有时候,在施肥之前,必须采取减少杂草密度的预备性步骤。
- This mixture of grasses and yarrow will out-compete the resident weed population, increase water penetration, and improve the microflora and organic matter in our soils. 牧草和蓍草混合可以减少杂草的数量,增加水的穿透能力,改善土壤的微生物和有机物质。
- Data in Table 8 and numerous field observations show that because the soil is less disturbed, zero tillage results in less weed populations than conventional tillage. 表8的资料和一些大田观察资料表明,因土壤较少被扰动,免耕比传统耕作的农田杂草群体更少。
- When grass weeds and broad-leaved weeds both occurred in the fields, the mixed use of clodinafop-propargyl and benazolin-ethyl could achieve better control effects on the whole weed population. 炔草酯与草除灵混用对禾本科杂草和双子叶杂草都具有良好的防除效果。
- The weed biodiversity was decreased with the improvement of soil nutrient status. There were 3-5 weed populations in treatments NPK and NPK plus organic materials,and 6-8 populations in treatments CK,N,NK and NP. 随着土壤养分状况的改善,杂草的物种多样性逐渐减少,氮磷钾及其与有机物料配合施用处理(NPK、SNPK、M1NPK、M2NPK)的杂草种群为3~5个,对照及氮、氮磷、氮钾处理(CK、N、NP、NK)杂草种群为6~8个;
- Problems with using agricultural pesticides in the production of a secure food supply has led to the world-wide problem of weed populations developing resistance to herbicides used for their control. 在安全食品方面使用农药的问题导致了世界范围内的如杂草种群抗药性以及除草剂的使用等广泛问题。
- He weed out one by one the book he do not want. 他把不想要的书一本一本丢掉。
- This city has a population of more than 1,000,000. 这个城市人口超过一百万。
- First thing tomorrow I'll weed the garden. 我明天一大早首先去除园内的杂草。
- We have to weed out unqualified applicants. 我们必须淘汰不合格的申请人。
- A desert has no settled population. 沙漠没有固定的居民。
- There was a steady increase in population. 人口在不断增长中。
- What is the population of this country? 这个国家的人口是多少?
- Disease has decimated the population. 疾病使大部分人死亡。
- The population of the island has sunk from100 to20. 这个岛上的人口从容不100人减少到了20人。
- What is the population of Ireland? 爱尔兰人口有多少?
- Weeds population in desolation lawn 荒芜草坪杂草
- There was a swell in the city's population. 该市出现过人口膨胀。
- We must weed out the traitors in our midst! 我们必须清除我们中间的叛徒!
- In ten years the city's population expanded by 12%. 十年之中,该城人口增加了百分之十二。