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Latest American Society of Agronomy Stories

2013-10-02 12:24:16

Over the past few decades, crop breeders have increasingly relied on the wild and weedy relatives of domesticated crops as new sources of disease resistance, drought tolerance, and other traits. But just like all wild plant species, these "crop wild relatives" (CWR) are also at risk of decline and extinction due to habitat loss, pollution, and climate change. On Wednesday, Nov. 6, 2013, two speakers will describe the latest efforts to identify and protect the wild relatives of domesticated...

Earthworms Can Survive And Recover After Stress From 3-week Drought
2013-09-19 13:20:17

American Society of Agronomy Earthworms are a welcomed sight in many gardens and yards since they can improve soil structure and mixing. But they are hard to find in the drier soils of eastern Colorado where water and organic matter is limited. Adding earthworms to fields where they are not currently found could help enhance the health and productivity of the soil. In areas where droughts are common, though, can earthworms survive? A new study suggests that they can. Earthworms use...

Tillage, Reduced-input Rotations Affect Runoff From Agricultural Fields
2013-06-11 13:55:55

American Society of Agronomy No-till management practices can reduce soil erosion, but evidence suggests they can also lead to increased runoff of dissolved phosphorus from soil surfaces. Meanwhile, farmers looking to avoid herbicides often have to combat weeds with tillage, which causes erosion. With all of the tradeoffs of different management systems, which one should growers use? To answer that question, researchers from the USDA Agricultural Research Service compared nutrient and...

2012-11-06 11:12:50

Phosphorus (P) is both an essential nutrient in agricultural fields and a contributor to poor water quality in surface waters. To encourage improved P management in fields, the P Index was proposed as a risk assessment tool in 1992. After 20 years of use, modifications, and growing pains, does the P Index accurately assess the risk of P loss? A special section being published next month in the Journal of Environmental Quality addresses that question. The collection of papers grew out of a...

2012-05-31 11:35:01

New edge of extinction research is creating a revival of conservation and interest in what these old plants mean to the future A botanist brings a species of alfalfa from Siberia, to the United States. His hope? The plant survives, and leads to a new winter-hardy alfalfa. But what also happened during this time in the late 1800's, isn't just a story of legend and lore. The truth of the matter is creating a current revival in both interest and conservation of what's now called a crop's...

2011-01-07 11:09:38

Researches Try Accounting for Spatial Trend in Single Crop Field Trials Scientists at Rothamsted Research, United Kingdom, in collaboration with the International Center for Agriculture Research in the Dry Areas (ICARDA), Syria have developed a method of accounting for spatial trend in single crop field trials. Spatial trend refers to the variations in crop yield and other characteristics observed when repeating this single crop field trial. Usually plant breeders will grow several...

2010-12-07 13:52:16

Planting soybean [(Glycine max (L.) Merr.] into Fe chlorosis-prone soils where soybean has seldom, if ever, been grown may require special precautions to establish effective Bradyrhizonium japonicum populations, while simultaneously providing adequate levels of N for the current crop. However, adding fertilizer N likely will increase rhizosphere pH and [ OH̢蠫 ] and, thus, promote Fe deficiency. Our objective was to determine whether varieties (Vs) that differed...

2010-10-26 13:43:15

Urban agriculture aims at helping Seattle's at-risk youth A case study published in the 2010 Journal of Natural Resources and Life Sciences Education by professors at Washington State University studies the challenges one organization faced in maintaining an urban market garden. The journal is published by the American Society of Agronomy. Since 1995, Seattle Youth Garden Works (SYGW) has employed young homeless individuals or those involved in the juvenile justice system. SYGW offers teens...

2010-10-22 16:49:24

Study Tests Water Quality Trends for Nitrogen and Phosphorus Researchers at the University of Florida Research and Education Centers and scientists at the South Florida Water Management District have published a report regarding the trends in water quality feeding into Everglades National Park. The report can be found in the September-October 2010 Journal of Environmental Quality, published by the American Society of Agronomy, the Crop Science Society of America, and the Soil Science Society...

2010-09-11 01:53:21

Scientists find low levels of bacteria in fields sprayed with swine manure That swine manure sprayed on to fields adds valuable nutrients to the soil is well known. But what is not known is whether all that manure is bringing harmful bacteria with it. A new study looks at the levels of nutrients and bacteria in soils of fields that have been sprayed with manure for fifteen years or more. The research team, composed of scientists from the USDA-ARS Crop Science Research Laboratory at...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'