The effect of push cart skidding on the physical and chemical properties of soil was analyzed quantitatively.
定量分析手板车集材对集材道土壤理化性质的影响，提出减少集材作业对林地土壤破坏的具体措施。
This experiment mainly carries on four aspects:Effects of earthworm on the physical and chemical properties of soil;
本试验主要进行以下方面的研究：蚯蚓对土壤理化性质的影响；
Through the research, it is explicit that slash disposal has also affected on the physical and chemical properties of soil on the harvested sites.
结果表明，迹地清理方式对作业迹地土壤理化特性产生一定程度的影响，进而影响森林采伐后的迹地天然更新与苗木生长质量。
The farmland reclaimed in different years are chosen to measure the physical and chemical properties of soil and to investigate the situation of weeds in farmland.
选择不同开垦年限的农田，测其土壤理化性质，调查农田杂草种类状况。
The physical and chemical properties of soil and substrate are different, so the moisture sensors can not be used directly for measuring the substrate moisture due to the great errors.
土壤与基质的理化特性相差较大，土壤水分传感器测定基质含水率时有较大误差，不能直接用于基质含水率测定。
Based on analysis of the physical and chemical properties of soil samples collected from Henan tobacco plantation area, the index system of soil fertility adaptability of tobacco was established.
本研究在分析河南省烤烟种植区各项肥力指标的基础上，建立了烤烟土壤肥力适宜性评价指标体系。
The previous researches on purple soils neglected the properties of rock fragments, the distributions of rock fragments, and the influence on soil physical and chemical properties.
以往对紫色土的各种研究都忽略土壤砾石的性质和空间分布，以及对土壤物理和化学性质的影响。
Based on the field investigation and soil analysis, some soil physical and chemical properties in different agroforesty systems in northern area of Jiangsu province were studied.
采用野外调查与室内分析测定的方法，研究了苏北地区林粮间作地土壤理化性质。
As an essential indicator of soil quality, soil organic carbon (SOC) and its fractions play an important role in many soil chemical, physical, and biological properties.
作为土壤质量的重要指标，土壤有机碳及其组分在土壤许多物理、化学和生物特性中发挥着重要作用。
As an essential indicator of soil quality, soil organic carbon (SOC) and its fractions play an important role in soil chemical, physical, and biological properties.
作为土壤质量的重要指标，土壤有机碳及其组分在土壤许多物理、化学和生物特性中发挥着重要作用。
Soil microaggregates can influence the soil physical, chemical and biological properties and may be used as an overall index for evaluating the fertility level of soil.
土壤微团聚体具有影响土壤理化生物性质多方面的作用，可能作为评价土壤肥力水平的综合指标。
The effects of soil-handling operations for coal mining subsidence on soil physical and chemical properties were investigated in this paper.
研究了采煤塌陷区适农土地表土剥离复垦和混推复垦对复垦后土壤理化性质的影响。
The amount of green manure added to soil and the soil chemical and physical properties also influenced the rate and degree of decomposition of the green manure.
土壤中的绿肥加入量及土壤本身的物理化学性质对绿肥的分解率及分解速率也有影响。
The density of Taiwania flousiana plantation should be adjusted to accelerate the growth of undergrowth vegetation, thus improving soil physical and chemical properties and increasing soil fertility.
秃杉人工林生长过程中要经常调整密度以促进林下植被生长，从而改善土壤理化状况，提高土壤肥力。
The influence of organic manure and chemical fertilizers on soil physical properties was studied.
通过长期定位试验研究了不同施肥处理对土壤物理性质的影响。
The effects of undecomposable organic materials mixed with biopreparate on the physical and chemical properties of continuous cropping greenhouse soil were studied.
研究了有机物料配合生物菌剂施入塑料大棚连作土壤后，对土壤理化性质的影响。
The bad physical and chemical properties of saline soil make it very difficulty to be used in planting trees and grasses.
盐渍土不良的理化性质使得该类型土壤的利用十分困难。
Results showed that MDM could obviously improve the physical and chemical properties of the alkali soil.
结果表明，MDM可显著改善草甸碱土的理化性质。
Results showed that MDM could obviously improve the physical and chemical properties of the alkali soil.
结果表明，MDM可显著改善草甸碱土的理化性质。
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