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Understanding temporal variability in crop yields has implications for sustainable crop production, particularly since greater fluxes in crop yields are projected with global climate change.
Nitrogen fertilizer is a key ingredient for growing a good corn crop. It is not unusual for a well-fertilized crop to yield more than twice as much as an unfertilized crop. But how much nitrogen shoul...
Volatile Dense Chemical Liquids in Groundwaters Can Produce Slowly Bubbling Gas Flow
Volatile Dense Chemical Liquids Groundwaters Bubbling Gas
2009/12/16
The successful cleanup of DNAPL-contaminated sites depends on our ability to understand the processes that transfer the contamination from the source of a spill to the surrounding groundwater. Until r...
Rainfall and Manure Application Timing Affect Organic Carbon Losses
Rainfall and Manure Application Organic Carbon
2009/12/16
Dissolved organic carbon (DOC) losses from tile drains are an underquantified portion of the terrestrial carbon cycle. This is particularly important in the eastern corn belt where tile drainage domin...
Ethanol Production Could Jeopardize Soil Productivity
Ethanol Production Soil Productivity
2009/12/16
There is growing interest in using crop residues as the feedstock of choice for the production of cellulosic-based ethanol because of the more favorable energy output relative to grain-based ethanol. ...
Simulating Pharmaceutical and Personal Care Product Transport
Pharmaceutical and Personal Care Product biosolids liquid municipal biosolids
2009/12/16
Pharmaceuticals and personal care products (PPCPs) carried in biosolids (i.e., treated sewage sludge) may reach surface waters or groundwater when these materials are applied as fertilizer to agricult...
Illinois Soil Nitrogen Test Measures Microbial Nitrogen
Illinois Soil Nitrogen Test Microbial Nitrogen
2009/12/16
The Illinois Soil Nitrogen Test (ISNT) was developed for this purpose, and involves estimation of gaseous ammonia liberated by heating the soil with strong alkali in a Mason jar. Several studies have ...
Wind, Salt, and Water Are Leading Indicators of Land Degradation in Abu Dhabi
Wind, Salt, and Water Leading Indicators Land Degradation Abu Dhabi
2009/12/16
Desert environments are characterized by poor vegetative cover, strong winds, dry, non-cohesive sandy soils, and hyper-arid conditions. In this context, the land resources of Abu Dhabi Emirate in the ...
Landfilled waste decomposes in the absence of oxygen and results in the production of methane. Landfills are classified as the second-largest human-made source of CH4 in the U.S. Additionally, landfil...
Impact of Floods on Soils
Floods Soils the physical-chemical state of the soil soil quality crop production
2009/12/16
A recent study conducted in the Midwestern United States examined the effects of harsh wet conditions on both cultivated and uncultivated soils, vastly advancing the knowledge of water’s effects on ag...
Understanding Soil Carbon Sequestration: New Book Presents Key Concepts
Soil Carbon Sequestration New Book Key Concepts
2009/12/16
A new book published by the Soil Science Society of America (SSSA), titled, Soil Carbon Sequestration and the Greenhouse Effect: Second Edition, addresses this topic and provides new perspectives as t...
Ultra-fine Coatings on Sediment Grains Influence Nitrate and Sulfate Storage in Soil
Ultra-fine Coatings Sediment Grains Nitrate and Sulfate Storage Soil
2009/12/16
Tiny sediment grains are covered with a very fine-grained, complex mixture of minerals in an open fabric that results in a large surface area in contact with water between the grains. Scientists at th...
奥巴马似乎已经成为美国甚至是欧洲的新希望。在面临危机的时刻就任世界上最大强权国家的总统，奥巴马需要展示他和他的团队的信心、战略方向和能力。就职演说无疑是全世界一窥其未来执政策略的风向标，事实证明，他的演说已经风靡全世界。
Understanding Phosphorus in Soils Is Vital to Proper Management
Phosphorus in Soils Proper Management
2009/12/16
Phosphorus is one of the key nutrients that can cause algal blooms and related water quality problems in lakes, rivers, and estuaries worldwide. Phosphorus entering waters originates from a variety o...
Tracking Poultry Litter Phosphorus: Threat of Accumulation?
Poultry Litter Phosphorus Accumulation
2009/12/16
The Delmarva Peninsula, flanking the eastern shore of the Chesapeake Bay, is home to some 600 million chickens. The resulting poultry manure and some of the chicken house bedding material is usually c...