分析表明，生长季节、栽培措施、地形地貌是影响本地区稻田杂草群落分布的主要因素。
The analysis shows That the season, the fields topography, and measures for cultivation are the main factors influencing the distribution of weed communities in paddy fields in this region.
对北京顺义地区有机化梨园中三个不同栽培区节肢动物群落特征进行了系统研究。
The characters of arthropod communities were studied in three different habitats of the organic pear orchard, in Shunyi, Beijing.
提出群落栽培对群落复混肥研制的要求，介绍群落复混肥的配方实例。
The requirement of community cultivation on community compound fertilizer are analyzed, several formulae of the community compound fertilizer are presented.
提出群落栽培对群落复混肥研制的要求，介绍群落复混肥的配方实例。
The requirement of community cultivation on community compound fertilizer are analyzed, several formulae of the community compound fertilizer are presented.
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