UCCE Humboldt - Del Norte Counties
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UCCE Humboldt - Del Norte Counties

Posts Tagged: groundwater

Pump-and-fertilize a potential solution to groundwater nitrate

Many farmers factor in the nitrates from their wells when they calculate fertilizer applications.
Pumping up water contaminated with nitrate and using it to fertilize crops is one way the agriculture industry can deal with the groundwater contamination detailed in a UC Davis report released last week, reported Mark Grossi in the Fresno Bee.

By itself, pump-and-fertilize won't be enough, said Thomas Harter, the lead author of the report, Addressing Nitrate in California's Drinking Water. It won't work in areas where there is too much salt in the groundwater, for example. Also, more fresh water must be allowed to seep into the underground aquifer. The fresh water will replace the tainted water and refill underground areas that have been overpumped in the past.

Dare to be different: Think beyond tomatoes, peppers
Laura Christman, Redding Record-Searchlight

When planning a summer garden, try some unusual vegetables, like heat-tolerant greens and odd tubers, the article suggests.

"Most people love tomatoes and a good sweet pepper, but that's not the be-all, end-all of summer nutritional health," said Sean Kriletich, a gardening expert with University of California Cooperative Extension Sierra Central.

Mixing things up in the garden yields different flavors, more nutrition, additional colors, textures and beneficial insects.

Posted on Tuesday, March 20, 2012 at 9:16 AM

Traces of dairy antibiotics reach groundwater

A very small amount of antibiotics administered to dairy cattle makes its way into shallow groundwater, according to research by UC Davis Cooperative Extension groundwater hydrologist Thomas Harter.

The results of Harter's research were outlined in a UC Davis press release distributed last week and picked up by the Sacramento Bee, an LA Times blog and other media outlets.

"Our next task is to determine whether these particular antibiotics are further degraded before reaching domestic and public water wells," Harter was quoted in the release.

California dairies typically give antibiotics to young cows, and to nonlactating adult cows. The news release said health officials are concerned that antibiotics could travel from manure lagoons into drinking water for people and livestock. Harter said that the health effects of antibiotics in drinking water at the low levels he detected are not known.

Harter's study was conducted at two large freestall dairy operations in the San Joaquin Valley with a total of more than 2,700 milking cows and 2,500 heifers. The research was published Aug. 10 in the American Chemical Society's online journal Environmental Science & Technology.

Dairy cow.
Dairy cow.

Posted on Monday, August 30, 2010 at 6:44 AM
Tags: dairy (1), groundwater (3), Thomas Harter (3)

UC expert speaks at Lodi town hall meeting

A town hall meeting yesterday, hosted by the North San Joaquin Water Conservation District, included comments from UC Davis Cooperative Extension groundwater hydrology specialist Thomas Harter, according to an account in the Lodi-News Sentinel.

The discussion centered on a local ballot initiative to fund the development of infrastructure for groundwater recharge. The story said authorities are working to solve "the region's groundwater crisis."

"The ground isn't sinking like in Bakersfield," said the general manager of the Stockton East Water District. "But if we don't act on it, that's what we are looking at."

Harter provided general information about groundwater hydrology at the meeting, the newspaper reported.

"Groundwater is like a bank account, if you take more out than you put in, you will have a lower balance," Harter was quoted. "It will be a matter of decades, not weeks or months, to refill the basin."

The upcoming ballot initiative, Measure C, would enable the district to collect a fee for pumping groundwater, the story said.

For groundwater links, publications, research and a blog, see Harter's Groundwater Hydrology website.

Thomas Harter.
Thomas Harter.

Posted on Thursday, May 13, 2010 at 8:08 AM
Tags: groundwater (3), Thomas Harter (3), water (1)
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