土壤盐渍化是降低农作物产量的主要环境因素之一。
Soil salinity is one of chief environmental factors that limit the crop yield potential.
高温及长日照是促进鳞茎形成的两个主要环境因素。
The moderate high temperature and long light period were two main environmental factors, which promoted to shaping of garlic bulb.
古河道砂层的存在，是影响围坝稳定的主要环境因素。
The sand stratum in old river bed is important factor affecting stability of dam.
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