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'Tailored' water -- the latest in lawn care
Date:7/10/2014

ys, homeowners wouldn't come in contact with it.

"Why not leave the nitrate in the water?" Leinauer asks, "Then the effluent already contains a fertilizer that the golf course operator [or homeowner] doesn't have to buy" or manage. The tailored water from the decentralized treatment system makes this feasible. "The overall idea is to combine subsurface, drip irrigation with tailored water: water with nutrient levels tailored for the summer versus the winter."

Will re-using this high-nitrate content water cause problems? Will the nitrate seep into the subsoil, and eventually to groundwater? Leinauer is now studying this at a test facility.

So far, results are good. Turf plots drip-irrigated with tailored water are just as green and healthy as those receiving potable water and mineral fertilizers, Leinauer says. The researchers also see little evidence of greater nitrate loss from the fertigated, drip-irrigated plots.

Still, he cautions, the results are preliminary and there are other challenges to address. For example, wastewater effluent tends to be high in salt. These problems must be solved, though, as water supplies continue to decline. In New Mexico, for example, demands on potable water from agriculture and a growing populace are so great that "basically the only water left for the landscape is treated effluent," Leinauer says. But the issue is hardly unique to his region. Leinauer hopes researchers around the country will embark on similar studies.

"We're doing our part here in the Southwest, but our region is completely different from, let's say, New England, or the Midwest," he says. "So, these questions need to be investigated more thoroughly on a regional basis."


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Contact: Susan Fisk
sfisk@sciencesocieties.org
608-273-8091
American Society of Agronomy
Source:Eurekalert  

Page: 1 2

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