نتایج جستجو برای: r 2002 seagull influence on soil properties
تعداد نتایج: 9202897 فیلتر نتایج به سال:
Soil nitrogen in farmland ecosystems is affected by climate, soil physical and chemical properties planting activities. To clarify the effects of these factors on sloping quantitatively, distribution total (TN) content, nitrate (NO3-N) content ammonium (NH4-N) at depth 0–100 cm 11 profiles Luanhe River Basin were analyzed. Meanwhile, properties, climatic NDVI (Normalized Difference Vegetation I...
Tillage system effect, Conventional (CT) vs. No-Till (NT), on soil physical properties and Br transport was studied at two locations in North Carolina. The soil types were a Typic Paleudults at Coastal Plain (site 1) and a Typic Kanhapludults at Piedmont (site 2). Bulk density (BD), total porosity (TP), macroporosity (MP), and saturated hydraulic conductivity (Ks) .were measured in plant row (R...
It is commonly assumed that the fully-saturated scenario represents critical shear strength condition for geotechnical structure design; nevertheless, this not case when dynamic of unsaturated soil considered, because water content affects transfer seismic waves through porous medium and into a structure. important to better understand behavior so response during an earthquake could be establis...
Soil bulk density measurements are often required as an input parameter for models that predict soil processes. Nonparametric approaches are being used in various fields to estimate continuous variables. One type of the nonparametric lazy learning algorithms, a k-nearest neighbor (k-NN) algorithm was introduced and tested to estimate soil bulk density from other soil properties, including soil ...
The influence of peat soil environment (PSE) on the mechanical properties cement-soil in area around Dianchi Lake and Erhai Yunnan Province has attracted much attention. This study explores change law UCS PSE, provides guidance for development sustained usage foundation. paper discusses preparation samples by adding humic acid (HA) cement to cohesive with low organic matter content (blending me...
Cation exchange capacity (CEC) is one of the most important chemical characteristics which influences soil quality from different aspects. At the same time, CEC is an input parameter of many computer models being applied in soil science and agriculture. Methods of CEC determination are always time-consuming and laborious. Therefore, developing a model for CEC estimation from other soil properti...
abstract the present study deals with a comparison between reactive and pre-emptive focus-on-form in terms of application and efficiency. it was conducted in an intermediate english class in shahroud. 15 male learners participated in this research and their age ranged from 18 to 25. a course book, new interchange 3, and a complementary book were used. every session the learners gave lectures o...
Tillage system effect, Conventional (CT) vs. No-Till (NT), on soil physical properties and Br transport was studied at two locations in North Carolina. The soil types were a Typic Paleudults at Coastal Plain (site 1) and a Typic Kanhapludults at Piedmont (site 2). Bulk density (BD), total porosity (TP), macroporosity (MP), and saturated hydraulic conductivity (Ks) .were measured in plant row (R...
*R. D. Lentz and D.L. Bjorneberg, USDA-ARS, Northwest Irrigation and Soils Research Lab., 3793 N. 3600 E., Kimberly, ID 83341 USA. *Corresponding author: [email protected] ABSTRACT For surface irrigation, the rate and spatial characteristics of infiltration processes influence crop productivity, water use efficiency, and erosion potential of stream flows. A change in infiltration rate a...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید