868 Articles found
Soil Science Society of America (SSSA) Articles
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Conservation versus conventional tillage on performance of three different crops
Conservation tillage, besides being more economical, prevents soil erosion and has other beneficial effects on our environment, but few studies have been conducted on differential responses of different crops to conservation tillage. The main ...
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Methods to improve seed yield of leymus chinensis based on nitrogen application and precipitation analysis
Optimum methods to improve perennial grass seed yield are crucial for agronomic practices. Tzvel [Leymus chinensis (Trin.)] seed yield was examined in field experiments from 2005 to 2007 to determine the effects of N application timing (i.e., ...
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Integrated warm- and cool-season grass and legume pastures: i. seasonal forage dynamics
High temperatures and scarce precipitation often cause the productivity and quality of cool-season pastures in Southwest Michigan to decline for an extended period during the summer. This study was conducted to determine whether integration of ...
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Carbon sequestration by tillage, rotation, and nitrogen fertilization in a Mediterranean vertisol
Our objective was to determine the effect of tillage system, crop rotation, and N fertilization on soil organic carbon (SOC) storage in the 0- to 90-cm profile in a long-term (20-yr) experiment established in 1986 on a rainfed Mediterranean Vertisol ...
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Plant density effect on reduced linolenic acid soybean cultivars
Demand for soybean [Glycine max (L.) Merr.] with modified oil composition has led to the development of new soybean cultivars with reduced levels of linolenic acid. The objective of this study was to determine the effect of plant density on ...
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Determining aluminum tolerance and critical soil pH for winter canola production for acidic soils in temperate regions
A growing interest in winter canola (Brassica napus L.) across the southern Great Plains has brought about many issues regarding production. One of the issues to be addressed is winter canola`s tolerance of Al when grown on acid soils. The ...
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Peppermint productivity and oil composition as a function of nitrogen, growth stage, and harvest time
The commercial production of peppermint (Mentha x piperita L.) is concentrated in more northern latitudes worldwide (north of the 41st parallel), including the United States. This 2-yr field study in Mississippi evaluated the effect of N (0, 80, and ...
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Hairy Vetch management for no-till organic corn production
Rolling-crimping to control hairy vetch (Vicia villosa Roth) may make organic no-till corn (Zea mays L.) possible. This study investigated how rolling-crimping date and growth stage of the cover crop affected hairy vetch control and if a ...
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A methodology to estimate the future extent of dryland salinity in the southwest of western Australia
Received for publication January 27, 2009. In the southwestern agricultural region of Western Australia, the clearing of the original perennial vegetation for annual vegetation-based dryland agriculture has lead to rising saline groundwater levels. ...
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Regional-scale assessment of soil salinity in the Red river valley using multi-year MODIS EVI and NDVI
Received for publication April 15, 2009. The ability to inventory and map soil salinity at regional scales remains a significant challenge to scientists concerned with the salinization of agricultural soils throughout the world. Previous attempts to ...
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A review of vegetated buffers and a meta-analysis of their mitigation efficacy in reducing nonpoint source pollution
Received for publication December 1, 2008. Vegetated buffers are a well-studied and widely used agricultural management practice for reducing nonpoint-source pollution. A wealth of literature provides experimental data on their mitigation efficacy. ...
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Methane flux in cropland and adjacent riparian buffers with different vegetation covers
Received for publication September 12, 2008. While water quality functions of conservation buffers established adjacent to cropped fields have been widely documented, the relative contribution of these re-established perennial plant systems to ...
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Greenhouse gas, animal performance, and bacterial population structure responses to dietary monensin fed to dairy cows
Received for publication January 27, 2009. The present study investigated the effects of a feed additive and rumen microbial modifier, monensin sodium (monensin), on selected variables in lactating dairy cows. Monensin fed cows (MON, 600 mg d–1) ...
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Influence of urea fertilizer placement on nitrous oxide production from a silt loam soil
Received for publication April 8, 2009. Urea placement in band or nests has been shown to enhance N use efficiency, but limited work has been done to assess its affect on N2O emissions. This study compared N2O emissions from urea prills applied to ...
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Use of insoluble polyacrylate polymers to aid phytostabilization of mine soils: effects on plant growth and soil characteristics
Received for publication March 5, 2009. We evaluated the use of polyacrylate polymers to aid phytostabilization of mine soils. In a pot experiment, perennial ryegrass was grown in a mine soil and in uncontaminated soil. Growth was stimulated in the ...
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Determining phosphorus and sediment release rates from five irish tillage soils
Received for publication December 11, 2008. The aim of this study was to compare the nutrient and sediment releases from five Irish tillage soils, inclined at 10- and 15-degree slopes, under a simulated rainfall intensity of 30mmh–1 in a controlled ...
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Selecting and applying cesium-137 conversion models to estimate soil erosion rates in cultivated fields
Received for publication April 19, 2009. The fallout radionuclide cesium-137 (137Cs) has been successfully used in soil erosion studies worldwide. However, discrepancies often exist between the erosion rates estimated using various conversion ...
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Sorption of sulfonamide antimicrobial agents to humic acid–clay complexes
Received for publication June 17, 2008. The interaction of sulfonamide antimicrobial agents with smectite clay minerals and humic acid (HA)–clay complexes was investigated in batch experiments to assess the influence of adsorbed humic acid on ...
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Responses of a dominant temperate grassland plant (Leymus chinensis) to elevated carbon dioxide and nitrogen addition in China
Received for publication March 24, 2009. The impact of elevated atmospheric CO2 concentration on plant communities is varied and strongly dependent on the dominant species response, as well as nutrient conditions. Responses of a dominant species ...
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Phosphorus runoff from turfgrass as affected by phosphorus fertilization and clipping management
Received for publication December 8, 2008. Phosphorus enrichment of surface water is a concern in many urban watersheds. A 3-yr study on a silt loam soil with 5% slope and high soil test P (27 mg kg–1 Bray P1) was conducted to evaluate P ...