Organic standards require soil fertility conservation and promotion of natural enemies ( see above ).

The serious effects of sand gold mining on soil fertility were paper.

砂金开采对土壤肥力产生严重影响.

Strip check space varies with plot slope, soil fertility and irrigation.

条畦宽度随地块坡度 、 土壤肥力和灌溉而变化.

The soil fertility shows a decrease trend in cornpea rotation.

玉米、豆轮作,土壤养分均呈下降趋势.

Principal component analysis was used to derive soil fertility variation factors.

运用主成分分析选取土壤肥力变异因子.

Soil fertility could be evaluated objectively by principal component analysis.

土壤主成分分析能较为客观地评价土壤肥力水平.

The different land use patterns affect soil physical property and soil fertility quality.

不同的土地利用方式影响着土壤的理化性质及土壤质量.

Therefore microorganism quantity and enzyme activity of soil alsoused as an evaluation index of soil fertility.

土壤微生物数量、酶活性与土壤养分含量之间存在相关关系,可以作为评价土壤肥力的指标.

Improve soil aggregate structure, reduce compaction, improve soil fertility activation.

改良土壤团粒结构, 减少板结, 提高活化土壤肥力.

Candle burning themselves Gan , Gan chunhua soil fertility.

甘为红烛燃自身, 甘为泥土育春花.

After soil improvement, the yield of this land has increased greatly.

改土后, 这块地的产量大幅提升.

This paper can provide valuable data for work in soil improvement in planting blueberry.

为我国蓝莓栽培中的土壤改良工作提供参考.

Preloading is a popular soil improvement technique for soft soils sometimes named pre-compression.

预压,有时也称预压缩,是一种常用的软土改善技术.

In the early self-soil improvement to the flow, Lushi Citylink family has ruled the area.

自明初至民国改土归流, 鲁氏家族一直统治连城一带.

Products at home for wet carbon, indoor air filters, water purification, soil improvement.

产品分居室调湿用炭, 室内空气过滤, 水质净化, 土壤改良.

This has provided valuable data for work in soil improvement.

这为土壤改良工作提供了宝贵资料.

The soil pipe of the toilet got something stuck in it.

马桶的排便管被堵住了.

Petty-bourgeois sentiment should be done away with.

要抛弃小资产阶级的伤感情调.

What are the advantages and disadvantages of soilless culture?

无土栽培有什么优缺点?

Please discuss the advantages and disadvantages of soilless culture?

请结合实际谈谈无土栽培有什么优点和缺点.

Which environmental factors must be considered while regulating and controlling the environment of soilless culture?

对无土栽培的环境设施调控,应考虑哪些主要的环境因素?