نتایج جستجو برای: soil management

تعداد نتایج: 1014909  

2016
Upendra M. Sainju Wenju Liang

Little is known about management practices that can simultaneously improve soil and environmental quality and sustain crop yields. The effects of novel and traditional management practices that included a combination of tillage, crop rotation, and N fertilization on soil C and N, global warming potential (GWP), greenhouse gas intensity (GHGI), and malt barley (Hordeum vulgarie L.) yield and qua...

2017
Maurício R. Cherubin Cássio A. Tormena Douglas Karlen Maurício Roberto Cherubin Cássio Antônio Tormena Douglas L. Karlen

The Soil Management Assessment Framework (SMAF) was developed in the U.S.A. and has been used as a tool for assessing and quantifying changes in soil quality/health (SQ) induced by land uses and agricultural practices in that region and elsewhere throughout the world. An initial study using SMAF in Brazil was recently published, but additional research for a variety of soils and management syst...

2016
Ouola Traoré Korodjouma Ouattara François Lompo

In cotton and cereals production systems, the most important cause of soil fertility degradation is the inappropriate crop residues management. In a long-term experiment carried out from 1982 to 2012, the effects of crop residues management (CRM) during 30 years on soil chemical properties and crops yields were evaluated in a cotton-cereals rotation. The experimental design was nonrandomized bl...

2003
Douglas L. Karlen Craig A. Ditzler Susan S. Andrews

The soil quality concept evolved throughout the 1990s in response to increased global emphasis on sustainable land use and with a holistic focus emphasizing that sustainable soil management requires more than soil erosion control. The concept includes two areas of emphasis—education and assessment—both based soundly on principles of soil science. Soil quality test kits, farmer-based scorecards,...

The purpose of this research was to investigate the interaction between the type of management approach and the type of combating desertification projects on soil fertility function and it is especially important in monitoring and evaluation of these projects. For this purpose, at the first, the range of three types of combating desertification projects including bush planting, constructing a c...

2016
Hao Liang Kelin Hu William D. Batchelor Zhiming Qi Baoguo Li

An integrated model WHCNS (soil Water Heat Carbon Nitrogen Simulator) was developed to assess water and nitrogen (N) management in North China. It included five main modules: soil water, soil temperature, soil carbon (C), soil N, and crop growth. The model integrated some features of several widely used crop and soil models, and some modifications were made in order to apply the WHCNS model und...

2015
Qi Deng Dafeng Hui Junming Wang Stephen Iwuozo Chih-Li Yu Tigist Jima David Smart Chandra Reddy Sam Dennis

BACKGROUND A three-year field experiment was conducted to examine the responses of corn yield and soil nitrous oxide (N2O) emission to various management practices in middle Tennessee. METHODOLOGY/PRINCIPAL FINDINGS The management practices include no-tillage + regular applications of urea ammonium nitrate (NT-URAN); no-tillage + regular applications of URAN + denitrification inhibitor (NT-in...

2015
Hongyuan Ma Haoyu Yang Zhengwei Liang Mark K. J. Ooi

BACKGROUND Management regimes for vegetation restoration of degraded grasslands can significantly affect the process of ecological succession. However, few studies have focused on variation in the soil seed bank during vegetation restoration under different management regimes, especially in saline-alkaline grassland habitats. Our aim was to provide insights into the ecological effects of grassl...

2004
Susan S. Andrews Douglas L. Karlen

bold et al., 1998). Because improper management can lead to deleterious changes in soil function, a need for Erosion rates and annual soil loss tolerance (T) values in evaluatools and methods to assess and monitor SQ was recogtions of soil management practices have served as focal points for soil quality (SQ) research and assessment programs for decades. Our obnized (e.g., Doran and Jones, 1996...

ژورنال: علوم آب و خاک 2009
ایوبی, شمس اله, خرمالی, فرهاد,

Understanding distribution of soil properties at the field scale is important for improving agricultural management practices and for assessing the effects of agriculture on environmental quality. Spatial variability within soil occurs naturally due to pedogenic factors as well as land use and management strategies. The variability of soil properties within fields is often described by classica...

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