美国农业部的植物学网站有许多知识和链接,很好,欢迎访问。 http://plants.usda.gov/index.html 看看这张图片吧: Caragana arborescens ; Siberian Peashrub Using this photo This photo and associated text may not be used except with express written permission from L ...
朋友介绍了一本书: 生物多样性和生物地理学的统一中性理论(The unified neutral theory of biodiversity and biogeography ,作者:Stephen P. Hubbell,Princeton University Press, 2001),说不错,我就拿来看看吧,先看看前言: 前言(Preface) 这是一部有关地理学方面的生物多样性新理论的书籍。在写这 ...
Pesticides Shown To Reduce Soil Fertility Come from http://www.beyondpesticides.org/dailynewsblog/?p=115 ( Beyond Pesticides , June 8, 2007) New research shows that pesticides can reduce the efficiency of nitrogen-fixing plants, impacting soil fertility and ultimately reducing crop ...