U.S. Department of Agriculture (USDA) research indicates that soil quality would not decline if post-harvest corn cob residues were removed from fields.
This work, led by Agricultural Research Service (ARS) soil scientist Brian Wienhold, supports the USDA priority of developing new sources of bioenergy. ARS is USDA's chief intramural scientific research agency.
Wienhold, with the ARS Agroecosystem Management Research Unit in Lincoln, Neb., led studies that compared runoff rates and sediment loss from no-till corn fields where postharvest crop residues were either removed or retained. The scientists also removed cobs from half of the test plots that were protected by the residues.
After the test plots were established, the scientists generated two simulated rainfall events. The first occurred when the fields were dry, and the next occurred 24 hours later when the soils were almost completely saturated.
During the first event, on plots where residue was removed, runoff began around 200 seconds after the "rain" began. Runoff from plots protected by residues didn't start until around 240 seconds after it started to "rain."
Runoff from the residue-free plots contained 30 percent more sediment than runoff from all the residue-protected plots. But the presence or absence of cobs on the residue-protected plots did not significantly affect sediment loss rates.
Wienhold's team concluded that even though cob residues did slightly delay the onset of runoff, sediment loss rates were not significantly affected by the presence or absence of the cobs. The results indicated that the cobs could be removed from other residue and used for bioenergy feedstock without significantly interfering with the role of crop residues in protecting soils.
In a related study, Wienhold examined how the removal of cob residues affected soil nutrient levels. Over the course of a year, his sampling indicated that cobs were a source of soil potassium, but that they weren't a significant source of any other plant nutrients.Results from this work have been published in Agronomy Journal
Ann Perry | EurekAlert!
Earlier flowering of modern winter wheat cultivars
20.03.2018 | Georg-August-Universität Göttingen
Algorithm could streamline harvesting of hand-picked crops
13.03.2018 | University of Illinois College of Engineering
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
19.03.2018 | Event News
16.03.2018 | Event News
13.03.2018 | Event News
21.03.2018 | Life Sciences
21.03.2018 | Trade Fair News
20.03.2018 | Physics and Astronomy