In the past, studying on the suitable period for crop irrigation, the biological characteristics of crops and soil moisture were used as their standards.
过去研究在作物适宜灌水时期，多以作物生物学特性及土壤水分为标准。
Biological characteristics of methane emission were compared among Oryza sativa, Panicum crus-galli and Cyperus difformis growing in paddy soil.
比较了生长于淹水田间的水稻、稗草和异型莎草甲烷排放的生物学特性。
The biological characteristics and pigment property were studied on Streptomyces-ZLT producing blue pigment screened from soil.
对一株从土壤中筛选的产蓝色素链霉菌-ZLT菌株进行了生物学特性和色素基本特性的研究。
The distribution of element in soil profile was related to the characteristics of elements, soil parent, topography, climate and intensity of geological leaching and biological accumulation.
各元素在土壤剖面中分布状况与元素特性、母质，地形、气候以及地质淋溶和生物积累强弱有关。
Edaphic factors the physical, chemical, and biological characteristics of the soil that together form an important component of the habitat because of their influence on plant distribution.
包括土壤的物理、化学和生物特征，因其对植物分布的影响，共同构成了栖息地的重要成分。
The characteristics of Cd pollution in soil, Cd forms transformation in the soil and its biological toxicity are reviewed in this paper.
论述了土壤Cd污染的特点、Cd在土壤中的形态转化特征、生物毒性及我国目前土壤Cd污染现状及危害。
The characteristics of Cd pollution in soil, Cd forms transformation in the soil and its biological toxicity are reviewed in this paper.
论述了土壤Cd污染的特点、Cd在土壤中的形态转化特征、生物毒性及我国目前土壤Cd污染现状及危害。
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