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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Effects of residue-free band width on soil temperature and water content  [1994]

Shinners, K.J.; Nelson, W.S.; Wang, R.;

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In the Northern Corn Belt, corn crop emergence can be delayed due to slow soil warming and drying when residue is present above the seed furrow. This study was conducted to determine the effects of residue-free band width on soil temperature and water content. Residue-free bands of 0, 80, and 320 mm, as well as a 360-mm-wide residue-free furrow, were created in a field plot study. Also, residue-free bands of 0, 80, 160, and 320 mm were created in a controlled environment study. A thermocouple matrix was placed in the soil around the seed zone. Soil temperature was recorded on a hourly basis during the normal crop planting and emergence period Soil water samples were also periodically taken during the time soil temperature was determined In the field study, the width of the residue-free band had a significant effect on temperature in the seed zone and less effect on soil water content. Based on accumulated growing degree days, the theoretical time to corn emergence was modeled as a logarithmic function of band width. Initially, the gradient of this relationship was large, which indicated the accumulated growing degree days increased rapidly with increasing band width. But with band widths greater than 300 mm, the curve's slope became relatively flat. In the controlled environment study, soil temperature below residue was substantially less than that below bare soil. A 320-mm band width accumulated sufficient growing degree days for corn to emerge on the sam
e day as a treatment with no residue cover. Residue condition (shredded and nonshredded) and residue density (6000, 8000, and 10000 kg/ha) had no significant effect on soil temperature. Soil under residue, even at the bare soil/residue interface, was generally higher in soil water than that below the clear soil surface
From the journal
Transactions of the ASAE (USA)
ISSN : 0001-2351

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
1995
Volume:
37
Issue:
1
Start Page:
39
End Page:
49
All titles:
"Effects of residue-free band width on soil temperature and water content"@eng
Other:
"references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
1995
Volume:
37
Issue:
1
Start Page:
39
End Page:
49
All titles:
"Effects of residue-free band width on soil temperature and water content"@eng
Other:
"references"