轮作

The weed community was composed of monocyledonous weeds and dicotyledonous weeds with barnyardgrass as its main part.

结果表明，禾本科杂草和石竹科杂草是烟稻轮作烟地的主要恶性杂草，其群落结构是单子叶杂草和双子叶杂草组成的混合群落。

Although it sounds like a palaver , once you ve got your head round making your own smokery and , frankly , this is a perfect job for the boys it s a doddle

虽然听起来像一个记录，一旦你得到虚拟你的头上一轮作出自己熏制而坦白地说，这是一个完美的工作，为男孩，它是一种轻而易举

The Necessity of water saving agriculture in the loess plateau of China is analysized,and main types of regulating soil water techniques are sumed up as follows:accumulating fertileness,crop rotation,intermittent fallowness of soil,drought resistant crop breeding, water saving ,run off agriculture and chemical methods.

分析黄土高原节水农业的必要性，总结出黄土高原农业调水技术主要有 7大类：培肥地力以肥调水，轮作倒茬调水，间隙休闲调水，抗旱育种调水，节水灌溉调水，径流农业调水，化学技术调水；指出在干旱、半干旱的黄土高原地区，利用农业调水技术是粮食增产增收的有效措施和必然趋

Much of the value of the timothy/meadow fescue ley for milk production is attributable to its palatability.

梯牧草／草地牛毛轮作草场对于饲养奶牛的主要价值，就在于其适口性好。

This paper presented some approaches to develop agriculture there.① Adjusting land use structure, using slope land as grassland in stead of cropland, constructing forage maize, bean and grain field or cold-hardiness fruit tree orchard;② Promoting mechanization, intensive cultivation and industrialization;③Popularizing plasti...

通过调查研究，认为晋西北农业生产应该注意以下几点：①在土地利用结构调整中，建设坡耕地退耕种草、饲料玉米、豆科杂粮和抗寒果树的4类用地结构；②在农业生产中，促进生产的机械化、集约化和产业化水平；③加大地膜覆盖推广力度，尤其是宽幅地膜的推广、增施化肥和有机肥、引进良种、农田保护性耕作与粮草轮作技术和病虫害防治等5大类实用农业技术。

Based on a long-term experiment, the soil organic carbon, readily oxidizable carbon and microbial biomass carbon of two sequence rotation systems with spring wheat and field pea in soil layer under different tillage patterns were studied.

以长期定位试验为基础，对麦－豆轮作次序下不同耕作措施间的土壤有机碳、易氧化碳以及微生物生物量碳进行了测定，计算了土壤微生物商在各个序列中变化并对土壤各级有机碳库进行了相关分析。

Phase 1 started with field pea followed by spring wheat whereas phase 2 started with spring wheat followed by field pea.The objectives of this thesis are:1 to quantitatively analyze effects of soil chemical,physical and biological properties on soil quality and productivity under different tillage systems and the driving factors for the changes of soil quality under tillage in a long-term,2 to select the best soil quality assessment indicators,and 3 to establish soil quality assessment models that are suitable for the erodible environment of semi-arid region on the Loess Plateau.

通过分析3个轮作周期不同耕作方式下土壤理化性质、生物性质和生产力对土壤质量的影响，阐明长期耕作过程中土壤质量的演变特征及其驱动因子，筛选出适宜于黄土高原半干旱区侵蚀环境下土壤质量评价的代表性指标；并综合前人的研究，结合区域特点，建立适宜于黄土高原半干旱区侵蚀环境的土壤质量评价模型。

By summarizing many years'practice experence,a set of technical measures was suggested on northern flax plant area of Heilongjiang.The measure is on the following aspect:crop rotation,selecting crops for rotation,land lev...

通过总结多年的实践经验，提出了一套黑龙江省北部地区亚麻轮作、选茬、整地、施肥、播种、田间管理、收获等方面的技术措施，为黑龙江省北部地区的亚麻生产提供了技术参考。

In conclusion therefore, rotation with green manure is the best cropping system for improved soil biological activity.

作物长期连作后与绿肥作物轮作，有利于提高土壤生物活性，是一种较好的种植方式。

That sweet potatoes cultivated with the rotation of different green manure was better for soybean and hyacinth bean, it was worse for sesbania and sunhemp.

不同轮作绿肥对甘薯营养成分之影响，以大豆及鹊豆表现较佳，田菁及太阳麻较差。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。