论文部分内容阅读
海南菠萝首次直销非洲
【出 处】
：
世界热带农业信息
【发表日期】
：
2004年2期
其他文献
文章基于浙江省四个案例县市192户农户调查数据,采用计量分析考察了老龄化、农户家庭社会资本及其二者交互作用对家庭林业经营的影响。研究结果表明老龄化对营林收入呈现显著
Remote-sensing data reveals the response of soil erosionintensity to land use change in Loess Platea
Developing an effective approach to rapidly assess the effects of restoration projects on soil erosion intensity and their extensive spatial and temporal dynami
最早从事转基因产品研究的国家是美国,目前该国已经能够生产近40种转基因产品。在美国之后,包括中国在内的很多国家都已经开始了转达基因产品的研究。
Variations of trace elements and rare earth elements (REEs) treated by two different methods for sno
Although previous investigations of the trace elements in snow and ice from the Qinghai-Tibetan Plateau obtained interesting information about pollution from hu
Palynological assemblage in the late Early Cretaceous from Sikouzi Section, Liupanshan Group, Centra
The Cretaceous (ca. 145 Ma~65 Ma) was characterized by remarkable greenhouse conditions which was more server than present greenhouse gas emissions. However, th
农业部部长杜青林日前表示,加入世贸组织后的农业政策调整是一篇大文章,也是摆在我们面前的一项紧迫任务。今后农业政策调整的重要内容是:调整农业和农村经
This study investigated the effects of sawdust as a soil amendment on certain growth parameters of Solanum esculentum Linn. grown in soil polluted with various
在1995年,Chung报道保留胰腺的十二指肠切除术Pancreas-Sparing Duodenectomy,PSD)手术后,许多外科医生对PSD手术进行了尝试和总结.PSD的适应症为:①没有侵犯胰腺的良性十二
期刊
中国音乐金钟奖是由中宣部批准设立、由中国文联和 中国音协共同主办的全国唯一常设的综合性专业大奖,每 两年举办一届。中国音乐金钟奖声乐比赛的设立,旨在推 动我国声乐艺