agrestal weed

Field trails of 75% for controf of weeds in non-cultivated land by 75%WG Sulfometuron-methyl;

75%甲嘧磺隆水分散粒剂防除非耕地杂草试验

This paper made a study of the soil fertility status,the soil fertility evolutionary trends of soil fertility on typical arable brown soil of Dongling and the east of Sujiatun sections in Shenyang,with the methods of sampling in the open air and indoor analysis.

本文采用野外采样与室内分析相结合的方法,以沈阳市东陵区和苏家屯区东部的典型耕地棕壤为研究对象,对耕地棕壤的肥力现状、变化趋势进行研究。

Modal experiment was conducted to assess the movement of heavy metals in meadow burozem in Shenyang affected by acid precipitation.

通过室内模拟试验，研究了沈阳地区酸雨对当地草甸棕壤中Ｃｄ、Ｐｂ、Ｃｕ、Ｚｎ和Ａｓ垂直迁移的影响，结果表明，酸雨能促进Ｃｄ、Ｐｂ、Ｃｕ和Ｚｎ的迁移，随酸雨酸度增加其促进作用也加强，而且酸雨对Ｃｄ、Ｚｎ的影响大于Ｃｕ、Ｐｂ、Ａｓ的迁移只有在弱酸性酸雨条件下才有增加，在强酸性酸雨条件下，Ａｓ的迁移受到抑制。

In this work, an upland meadow burozem, one of the main agricultural soils in Northeast China, was selected as test soil, and three treatments, i.

本研究选用中国东北主要农田土壤-旱田草甸棕壤作为研究对象,研究不同施肥制度(对照不施肥,NPK和NPK+M)对非生长季土壤无机氮动态变化的影响。

STUDIES ON SOME INDEXES OF ORGANIC MATTER IN BROWN-YELLOW SOILS WITH DIFFERENT FERTILITY LEVELS

不同肥力棕黄土(耕作棕壤)几项有机质指标的研究

Profile Distribution of Exchangeable Cations under No-till and Conventional Tillage in An Aquic Brown Soil

免耕与常规耕作潮棕壤交换性阳离子的剖面分布特征

Characteristics of turnover and soil microbial biomass in meadow brown soil under different rotation and tillage systems

不同耕作和轮作下潮棕壤微生物生物量及周转特征

Dynamics of aquic brown soil enzyme activities under no-tillage.

潮棕壤免耕农田土壤酶活性的动态变化

Analysis on Soil Fertility and Changing Tendency of the Typical Arable Brown Soil

典型耕地棕壤肥力状况及变化趋势的研究

Some soils are not suitable for farming.

有些土壤不适于耕作。

tillage machine with power-driven working parts

驱动型土壤耕作机械

Content Evaluation on the Available Microelements in Typical Cultivated Brown Soil of Changtu County in Liaoning Province

辽宁省昌图县典型耕地棕壤有效态微量元素含量评价

Soll Nutrients and Evolutionary Trends of the Typical Arable Brown Soil in Shenyang

沈阳地区典型耕地棕壤养分状况及变化趋势的分析

SOIL'S ENZYME ACTIVITY IN DIFFERENT CONSERVATION TILLAGE IN SLOPING LAND

旱作坡耕地保护性耕作土壤酶活性研究

The Technology Study of Mechanical Conservation Tillage for the Red Hillside Fields in YUNNAN;

云南红壤旱耕地机械化保护性耕作技术研究

prepare for crops, of soil.

为农作物做好耕作土壤的准备。

Incorporation of crop residues; conventional tillage.

把作物残体混入土壤的传统耕作制。

The Development and Present Situation of Brown Earth and Drab Soil in the Mountain Regions of Beijing

北京地区棕壤与褐土研究工作的发展及现状

Effect of Long-term Rotated Fertilization on Dynamic Change of Potassium in Brown Soil

长期轮作施肥对棕壤钾素动态变化的影响

Tilth's the quality of a soil which makes it easy to cultivate and easy for the roots of plants to grow.

耕性指的是使土壤易于耕作，根系易于生长的一种土壤性状。

Clay makes the soil hard to work when wet and it cracks when dry.

粘土遇湿使土壤无法耕作，遇旱使土壤发生龟裂。

Effect of different farming methods on soil microbial biomass and soil fertility

耕作方式对土壤微生物和土壤肥力的影响