农业企业化经营模式及发展对策研究——对昌吉市大西渠镇“支部＋公司＋协会”模式的探索
Published in 沿海企业与科技 • Jan 1, 2010
Authors:
戴秀玲
Abstract
Epiphytic lichen communities are highly sensitive to excess nitrogen (N), which causes the replacement of native floras by N-tolerant, "weedy" eutrophic species. This shift is commonly used as the indicator of ecosystem "harm" in studies developing empirical critical levels (CLE) for ammonia (NH3) a...
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