Navigation Links
'Tailored' water -- the latest in lawn care

In Santa Fe, Albuquerque, and other major cities in New Mexico, nearly every public golf course is now watered with treated municipal wastewater rather than precious potable water supplies. Across the U.S. Southwest as a whole, more than 40% of all golf courses receive treated effluent. Reusing the effluent increases the sustainability of golf courses.

Additionally, golf courses and homeowners alike fertilize their lawns during the growing season. The major nutrient in fertilizer is nitrate. A New Mexico State University turfgrass expert has a new vision for even more efficiency.

Bernd Leinauer, a turfgrass expert at New Mexico State University, suggests combining "fertigation," drip irrigation, and decentralized water treatment. In a paper published in the journal Crop Science, he and co-author Elena Sevostianova detail their modern-day recipe for a lush, green lawn.

Leinauer says combining the three approaches could solve several issues. Right now, many big New Mexico cities remove nearly all the nitrate from wastewater all the time. That's an expensive and energy-intensive step designed to prevent pollution of surface- and ground- waters. "But from a turf perspective that doesn't make a whole lot of sense," Leinauer says, since golf course managers (and homeowners) end up applying mineral nitrate fertilizers to keep turf thriving.

Fertigation is a method of supplying fertilizers to plants through irrigation water (fertilize and irrigate at the same time). Drip irrigation delivers water directly to plant roots underground, instead of sprinkling plants from above.

In Leinauer's and Sevostianova's vision, a decentralized treatment system at a subdivision would be "tailored" to generate effluent during the summer that contained 15 parts per million (ppm) of the nutrient nitrate. Residents would then use this water to fertigate their lawns. Because drip systems put water directly into the soil, Leinauer says, 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."


Contact: Susan Fisk
American Society of Agronomy

Related biology news :

1. Tailored methane measurement services are to be developed for shale gas extraction, municipal waste
2. Oil palm plantations threaten water quality, Stanford scientists say
3. New study: Ancient Arctic sharks tolerated brackish water 50 million years ago
4. Fracking flowback could pollute groundwater with heavy metals
5. Another concern arises over groundwater contamination from fracking accidents
6. Urban Water Management Workshop stresses more collaboration and innovation
7. Chemical pollution of European waters is stronger than anticipated
8. New advance allows gels to wiggle through water
9. Scientists identify Deepwater Horizon Oil on shore even years later, after most has degraded
10. New method of wormlike motion lets gels wiggle through water
11. How does snow affect the amount of water in rivers?
Post Your Comments:
Related Image:
'Tailored' water -- the latest in lawn care
(Date:6/2/2016)... , June 2, 2016 The Department ... has awarded the 44 million US Dollar project, for the ... Vehicle Plates including Personalization, Enrolment, and IT Infrastructure , ... in the production and implementation of Identity Management Solutions. Numerous ... however Decatur was selected for the ...
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of the medical ... premium product recently added to the range of products distributed by Ampronix. ... ... ... Ampronix News ...
(Date:5/9/2016)... 2016 Elevay is currently known ... freedom for high net worth professionals seeking travel for ... connected world, there is still no substitute for a ... sealing your deal with a firm handshake. This is ... advantage of citizenship via investment programs like those offered ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... TOKYO , June 24, 2016  Regular discussions on ... to take place between the two entities said Poloz. ... in Ottawa , he pointed to the ... and the federal government. ... Poloz said, "Both institutions have common economic goals, why not ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers and ... and the 6000i models are higher end machines that use the more unconventional z-dimension ... light beam from the bottom of the cuvette holder. , FireflySci has developed ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... of its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering with ... in this eBook by providing practical tips, tools, and strategies for clinical researchers. ...
(Date:6/23/2016)... June 23, 2016   Boston Biomedical , ... compounds designed to target cancer stemness pathways, announced ... granted Orphan Drug Designation from the U.S. Food ... gastric cancer, including gastroesophageal junction (GEJ) cancer. Napabucasin ... to inhibit cancer stemness pathways by targeting STAT3, ...
Breaking Biology Technology: