Cover crops are important components of cropping systems due to their role in improving soil quality. Lack of adequate levels of soil micronutrients prevents th
To define the preliminary embryogenesis culture conditions of Moroccan Cork Oak (Quercus suber L.) in secondary propagation systems, secondary embryos formation
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本文以福建东乌礁湾30MW风力发电项目、中国龙源电力集团公司为案例,探讨了我国风电企业在金融危机背景下的发展问题,并展望了清洁发展机制和新能源等相关产业在我国的发展前
湖北丹江口市红旗中学始建于1971年，位于“中国水都”丹江口市城区中心。校园环境优美，布局合理，设施齐全，已形成花园式格局。
The volatile constituents of the essential oils from leaves from the weed plants Parthenium hysterophorus and Ambrosia polystachya were identified and quantifie
Forest trees in general and those belonging to family Fabaceae in particular, have proved to be recalcitrant for propagation through tissue culture. Saraca asoc
时光流逝,一年又过去了,不知不觉我又长大了一岁,15岁的我虽不是很成熟,但也懂得时间的可贵,眼看着就要步入初三了,未来的一年将是我人生的一个转折点。迈进初三,就意味着我
The investigation on the vegetation and flora of the Ranikot Fort area was undertaken during 2009-2013. Ranikot Fort Area is a historical heritage of Sindh. So
本文以山西省为例,调查分析了保护性耕作技术推广应用的现状和存在的突出问题,给出了影响新技术推广应用的相关因素,采用因子分析方法提取了技术体系、服务模式、经济利益、