effect of combined use of organic and chemical fertilizers on soil organic matter and red soil physical properties of upland field was studied in red soil area in this paper.
研究了有机肥与化肥配施对旱地红壤有机质和物理性质的影响。
the effect of different film-uncovering time on yield, output value, inner chemical components and quality of flue-cured tobacco in upland field was studied by the method of grey correlation analysis.
this paper is a trial to evaluate the effect of multiple cropping systems on upland field by analytical hierachy process (ahp) and systematic analysis.
本文试图采用层次分析法(ahp)和系统决策对旱地多熟制效益进行综合评价。
the long-term monitoring results of the fertility of yellow upland soil and fertilizer effect showed that the average n utilization rate of maize planted on the yellow upland field was 40.