Featured Research

from universities, journals, and other organizations

Does Aeration Reduces Compaction And Runoff On No-till Fields?

Date:
April 12, 2009
Source:
Texas A&M AgriLife
Summary:
Much of Texas' wheat may be grazed as a part of a dual-use crop. But many fields are still prepared using conventional tillage, which may not efficiently capture rainfall -- a key to economic success in a semi-arid environment, said a Texas AgriLife Research scientist. Dr. Paul DeLaune, environmental soil scientist at the Texas AgriLife Research and Extension Center at Vernon, said tillage operations can increase soil compaction, thereby increasing runoff.

Dr. Paul DeLaune monitors a rainfall simulator over study plots where water was collected, measured and analyzed for quantity and quality from different tillage systems.
Credit: Texas AgriLife Research photo by Dr. John Sij

Much of Texas' wheat may be grazed as a part of a dual-use crop. But many fields are still prepared using conventional tillage, which may not efficiently capture rainfall – a key to economic success in a semi-arid environment, said a Texas AgriLife Research scientist.

Related Articles


Dr. Paul DeLaune, environmental soil scientist at the Texas AgriLife Research and Extension Center at Vernon, said tillage operations can increase soil compaction, thereby increasing runoff.

Each year, depending on market conditions, up to 75 percent of wheat planted in Texas may be grazed, and of that, 95 percent is under conventional tillage, DeLaune said.

"There is a perception among some producers considering no-till production that using no-till in dual-use wheat production will increase compaction and therefore reduce water infiltration and decrease yields," he said. "Studies are needed to determine whether or not this perception is valid."

One management practice to potentially reduce compaction and/or increase water infiltration is the use of an aerator in no-till dual-use systems, DeLaune said.

The tines of the aerator can be varied from 0 to 10 degrees offset, with soil disturbance increased by increasing the offset, he said. The aerator will disturb the soil down to the depth of 8 inches, yet leave considerable residue on the soil surface.

At the Smith-Walker research field near Vernon, DeLaune studied the impact of different tillage operations in dual-use wheat on runoff quantity, water quality and nutrient loss.

Tillage treatments were applied in early September and included: conventional-till, no-till and no-till with aerator offsets at 0, 2.5, 5, 7.5 and 10 degrees. Although two production systems were to be compared (graze-out and graze plus grain), no livestock grazing took place due to drought and poor forage production. However, there was extensive grazing from whitetail deer, he said.

In mid-December, 1.5- by 2-meter plots were established in the two production systems. Rainfall simulators were used to apply a runoff-producing event to the crop, he said.

A simulated rainfall of about 2.75 inches per hour was showered over the crop and allowed to continue until one-half hour after runoff had started. The runoff water was collected, measured and analyzed for quantity and quality.

In his study, DeLaune timed the minutes it took to achieve runoff. He said the runoff came quickest, in the highest quantity and with the most soil erosion from the conventional-tilled plots.

The total amounts of ammonium and phosphorus in the runoff water were higher also from the conventional-tilled plots.

There was no statistical difference in runoff volume, soil erosion and nutrient runoff amounts between the no-till plots and the aerated treatments, he said.

These initial results show that the use of an AerWay aerator may not be economical, based solely on soil and water conservation. Grazing effects and grain yields may indicate otherwise as the study continues, DeLaune said. Grazing effects and grain yields were not taken due to the extreme and persistent drought in 2008-2009.

Runoff quantity, water quality and yield data will continue to be collected over the next two years.

This study is supported by the Texas Wheat Producers Board.


Story Source:

The above story is based on materials provided by Texas A&M AgriLife. Note: Materials may be edited for content and length.


Cite This Page:

Texas A&M AgriLife. "Does Aeration Reduces Compaction And Runoff On No-till Fields?." ScienceDaily. ScienceDaily, 12 April 2009. <www.sciencedaily.com/releases/2009/04/090401181236.htm>.
Texas A&M AgriLife. (2009, April 12). Does Aeration Reduces Compaction And Runoff On No-till Fields?. ScienceDaily. Retrieved December 21, 2014 from www.sciencedaily.com/releases/2009/04/090401181236.htm
Texas A&M AgriLife. "Does Aeration Reduces Compaction And Runoff On No-till Fields?." ScienceDaily. www.sciencedaily.com/releases/2009/04/090401181236.htm (accessed December 21, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, December 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com
Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Reuters - Light News Video Online (Dec. 19, 2014) Millions of monarch butterflies begin to descend onto Mexico as part of their annual migration south. Rough Cut (no reporter narration) Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins