In protected cultivation condition , continuous cropping obstacle has been increasing year by year . The common methods usually have certain limitations .
设施栽培条件下,蔬菜连作障碍逐年加重,生产上通常采用的防治方法均存在一定的局限性。
High-yield cultivation of soybeans in multiple cropping with barley was experimentalized in 1992 .
于1992年进行了大豆与大麦复种的丰产栽培试验。
Similar success stories are cropping up , in patches .
同样成功的故事也在阶段性中出现。
Cropping system and farming methods and techniques .
耕作制度、耕作方法和栽培技术。
Farmer must change cropping scheme next season , using own untreated seed or a different crop .
农户必须改变下一季作物计划,使用自己的未处理的种子或不同的作物。
The yield components of three succeeding crops under different cropping systems .
不同复种轮作方式下的各季后作物产量构成。
However , automakers confirm that the issue is cropping up in their negotiations to expand existing plants or build new ones .
然而汽车制造商们证实,这个问题正突然出现在它们有关扩建现有工厂或建设新厂的谈判中。
Comparison of morphological characteristics in south-china double cropping super rice seedling .
华南双季超级稻秧苗形态性状的比较研究。
It also explains the depressing headlines that are cropping up-the politicians are revealing the extent of the problem before taking action .
它也对那些突然冒出来的令人沮丧的新闻头条进行了阐述:政客们在采取行动之前揭示了问题的严重性。
Cropping , panning and custom effects are easy with automatic key frames .