1.
Fertilizer Effect and Nutrient Accumulation Rule of Angelica Dahurica in Normal Soil Nutrient Condition;
中等土壤肥力水平下祁白芷的肥料效应及养分积累规律
2.
Effects of Fertilization Formula and Level on Wheat Yield、Quality and Fertilizer Utilization under Different Soil Fertility;
不同土壤肥力施肥配方及水平对小麦产量、品质和肥料利用的影响
3.
Study on Nitrogen Transformation of Various Fertilities Soil in Greenhouse
不同肥力水平大棚土壤氮素转化的研究
4.
The Influence of Different Fertilization Levels on Yields, Nutrient Absorption and Soil Fertility of Alfalfa;
不同施肥水平对紫花苜蓿产量、营养吸收及土壤肥力的影响
5.
The paddy?upland system increased clay dispersion content and soil fertility.
水旱轮作可增加土壤黏粒含量,提高高沙土肥力水平;
6.
Analysis of Soil Fertility and Fertility Betterment Measures for Paddy Field in Kaiyuan City
开原市水田土壤肥力分析及培肥措施
7.
STUDY ON THE ESSENCE OF SOIL FERTILITY--Ⅳ. PADDY SOIL
土壤肥力实质的研究——Ⅳ.水稻土
8.
The chloroform fumigation-incubation method was used to measure the biomass-C and-N ofsoils with different fertility levels.
应用氯仿熏蒸培养法测定不同肥力水平的土壤生物量-C和-N。
9.
Treatments of manure, lime, N, P, and K are necessary to maintain nutrient levels and productivity of the soil.
需要粪肥、石灰、氮、磷和钾处理以维持土壤养分水平和生产力。
10.
Effects of Chemical Fertilizer and Organic Manure on Rice Yield and Soil Fertility
长期不同施肥对水稻产量及土壤肥力的影响
11.
Crop rotations without addition of fertilizers help maintain soil organic carbon and N levels, but do not maintain high productivity levels.
*不施肥的作物轮作有助于维持土壤有机碳和氮水平，但不能维持高生产力水平。
12.
In the mean time,we also analysed changing laws of Lou soil?s physical properties in heavy loam soil region under different fertility level.
同时 ,还着重分析了重壤带的 土娄 土在不同肥力水平下其物理性质的变化规律。
13.
Studies on Effects of Fertilizer Application in Tobacco Soils with Different Levels of Available Phosphorus
不同速效磷水平植烟土壤磷肥施用效应的研究
14.
The Comprehensive Evaluation and Research on Spatial Variability about Soil Fertility in Chengdu Plain;
成都平原土壤肥力综合评价与空间变异研究
15.
Study on Comprehensive Evaluation and Spatial Variability of Soil Fertility on Sanjiang Plain;
三江平原土壤肥力综合评价及空间变异研究
16.
An optimum planting density must be employed to get a high yield, depending upon soil condition, varietal tillering ability, fertilizer level, number of plants per hill, and planting season.
获得高产必须采用最适植株密度，视土壤条件、品种分蘖力、肥力水平、每蔸苗数和播种季节而定。
17.
The abundance and availability of water and nutrients in a soil ecosystem determine its fertility.
土壤生态系统中水分和养分的丰度和有效性决定土壤的肥力。
18.
"The smaller the soil particles, the greater is the surface area of the soil; the water holding capacity, the power of holding plant food and the tenacity of the soil depend on this surface area. "
土粒愈小，则土壤的表面积愈大。土壤的持水力、保肥力和土壤韧度都决定于这一表面积的大