topsoil depth

The effects of soil tillage depth and straw recycling model on growth, yield and yield components of crop, The physicochemical properties of soil, soil water content and the trait of potential weed communities were studied from 2005 to 2006 year.

研究不同土壤耕作深度和秸秆还田与否对水稻生长及产量构成、土壤养分状况、土壤水分变化和杂草群落动态的影响，初步明确了水田土壤耕深和秸秆还田的综合效应。

In this paper, a series of field experiments were conducted to study the effect of different tillage depth and ridging mode on the agronomic characters, yield and quality of flue-cured tobacco.

本文通过一系列田间试验,结合昆明气候、土壤特点,研究不同耕作深度和起垄方法对烤烟农艺性状、产量和品质的影响,为昆明改良植烟土壤、改进烤烟栽培技术、生产特色优质烟叶提供参考依据。

Study on Ecologic Effect of Soil Tillage Depth and Straw Recycling in Directly Sowing Rice Field;

直播稻田土壤耕作深度和秸秆还田的生态效应研究

Effect of Tilling Depth on Growth, Nutrient Uptake, Yield and Quality of Flue-Cured Tobacco Plant

耕作深度对烤烟生长、养分吸收及产量、质量的影响

Effects of Tillage Practices on Soil Organic Carbon Distribution and Mineralization in Different Depth of a Brookston Clay Loam Soil

耕作方式对Brookston粘壤土耕层不同深度有机碳分布及稳定性影响

"In general, cropping systems should include deep-rooting legumes."

广义地说,耕作制度应围绕着深根性豆科植物的利用来设计。

Effect of tillage techniques and planting depth on saline-alkali tolerance of oats in Inner Mongolia

内蒙古地区不同耕作方式与播种深度燕麦耐盐碱性分析

Strength Analysis of Deep Excavation Ploughing Colter on ANSYS

基于ANSYS的深耕挖掘犁刀强度分析

The retail channel's “Deep cultivate and fine operation” of fast moving consumer goods

快速消费品分销渠道的“深耕细作”

Temperature and depth's dependences on N_2O emission in the cultivated layer soil

耕层土壤N_2O排放与温度及土壤深度依变性

A Study of the Farming Methods and Agricultural Techniques in Ancient Korea;

古代韩国旱田耕作法和农耕制度的考察(续)

Effects of Tillage on Soil Temperature of Plough Layer in Spring of Black Soil Regions of China

黑土区耕作措施对春季耕层温度的影响

maximum operating water depth

最大工作（水）深度

So the autumn ploughing should be deeper than the spring ploughing.

因此秋耕要比春耕深。

STUDY ON THE MODEL OF TRI-DEEPNESS AND BANDIG-TYPE TILLAGE AND CULTIVATION TECHNOLOGY IN WATERLOGGED AND FLAT LOWLAND

低平易涝地大豆三深带状耕作栽培模式研究

Analysis of the Morphology of Scarabaeoidea and Bionic Design of Subsoiling Components;

金龟子形态分析及深松耕作部件仿生设计

Design and Experimental Study of the Machine of Vibrating Deeploose and Intertillage

振动式深松中耕作业机的设计与试验研究

The major performances and the extension prospect of the comprehensive processing machine with deep scarifying and shallow plough and ridging

深松浅耕起垄综合作业机主要性能及推广前景

Study on the Evolving Regularity and Orientation and Strategies of Farming System in Triple Cropping Region of Hunan Province, China;

我国三熟耕作区湖南省耕作制度演变规律、趋势与对策研究

Effect of different cultivation measure on soil temperature and moisture in the Loess Plateau

黄土高原坡耕地不同耕作措施对土壤温度和水分的作用效应