Posts Tagged: Dan Putnam
“I think that's a big advantage if you don't have a lot of land,” the farmer said. “You can produce a tremendous amount of feed in a very, very small area with a very little amount of water.”
However, UC Cooperative Extension alfalfa specialist Dan Putnam noted in the story that the system may not pencil out.
"If you really apply a little bit of economics to it and animal nutrition to it, it doesn't appear quite as promising as one might think," Putnam said.
There is no question that animals find the sprouted barely delicious. Online videos show cattle and horses "gobbling up sprouted grain like a vegetarian at a salad bar," Putnam wrote in a 2013 blog post that asked Does hydroponic forage production make sense? Things are not always as they seem. Animal ration calculations are based on dry matter since water is provided separately.
"A feed with 90 percent water (such as sprouted grain) has considerably less 'feed value' than something with only 5 percent water (such as the grain itself), on a pound for pound basis," Putnam's blog post says.
Feeding sheep sprouted barley makes sense to Mario Daccarett, the owner of the Golden Valley Farm. He said cheese made from his sheep's creamy milk is sold in places like Whole Foods.
"They have our cheese there and they tell me that our Golden Ewe cheese is the best for grilled cheese sandwich ever, and they have over 500 different varieties of cheese there," Daccarett said.
The farmer feeds his sheep one part oats and hay and one part sprouted barley.
“You do the math and you say, 'Well, yeah, it might not work,' but once we started doing it we found out that sheep tend to eat less, more nutrition, more enzymes,” Daccarett said. “So they become more efficient.”
The drought is forcing farmers to reexamine the way they water their crops, but converting to drip irrigation in alfalfa is unlikely to be widely implemented, reported David Wagner on KPBS Radio News.
The drip irrigation system conserves water - almost by half, said farmer Jack Cato - but is expensive and requires regular maintenance. After six years, the drip system is yet to pay for itself.
"Drip irrigation is not the answer for everything," said Khaled Bali, irrigation advisor with UC Agriculture and Natural Resources (UC ANR). "I would not recommend switching every acre in the Imperial Valley to drip irrigation."
Cato added that new drip irrigation users face a steep learning curve.
"Whatever farm starts doing this, he needs to take baby steps," Cato said. "It's not something you learn overnight, or in a book. You have to study your fields daily."
For more on water use and alfalfa, see Why alfalfa is the best crop to have in the drought by Daniel Putnam, UC ANR Cooperative Extension specialist based at UC Davis, in the Alfalfa & Forage Blog.
At the recent California Plant and Soil Conference in Fresno, multiple speakers showed pictures of what they labeled "California snow," the article said.
Plant toxins like selenium, boron and salt leach out with water, but water is in short supply this year. "That's why a lot of land is fallow," said Gary Banuelos, USDA-ARS researcher in Parlier.
At the conference, Rick Snyder, UC Cooperative Extension specialist in the Department of Land, Air and Water Resources at UC Davis, said applying less water will reduce deep percolation and could result in higher salinity in the rooting zone. Eventually deficit irrigation will become problematic, especially if practiced over a longterm drought.
Snyder said it might be better to apply available water to a smaller area to maintain production. In the case of permanent crops, he suggested the same frequency of irrigation, but using less water with each application.
David Doll, UCCE farm advisor in Merced County, said almonds are sensitive to high levels of sodium, chloride and boron; and that some rootstocks are more tolerant of saline conditions than others.
Dan Putnam, UCCE specialist in the Department of Plant Sciences at UC Davis, said alfalfa may be capable of tolerating higher salt levels than previously thought.
Some degraded water that could not be used on food crops can be used on alfalfa, he said, adding that alfalfa is in higher demand than many other salt-tolerant plants. While salinity may trigger a decline in percentage of germinated seeds, Putnam said, “that doesn't scare us; we can live with a 40 percent level.”
Blake Sanden, UCCE advisor in Kern County, said there are research gaps with regard to soil toxin tolerance in pistachios.
However, he said, a buildup of boron in the soil is "a potential boron time bomb."
Sanden's research showed a doubling of total boron in the soil after nine years. Without 6 to 10 inches of rainfall or fresh water winter irrigation for leaching every one to two years, he said, high levels of boron could render pistachio production unsustainable.
Reporters Julia Lurie and Alex Park gleaned data for the story from, among other sources, a post in the UC Alfalfa & Forage News Blog titled Alfalfa benefits wildlife and the environment, in addition to its economic value, written in May 2013 by Rachael Freeman Long, UC Cooperative Extension advisor in Yolo County, and Daniel Putnam, UCCE specialist in the Department of Plant Sciences at UC Davis.
The Mother Jones article noted that alfalfa hay is a superfood of sorts for dairy cows — it's high in protein, high in energy and it's digestible.
"When you feed alfalfa, you produce more milk," Putnam and Long wrote in the blog post. "That's the bottom line. The next time you have pizza (with cheese), milk on your cereal, or ice cream, thank alfalfa."
The Mother Jones' info-graphic says it takes 683 gallons of water to produce one gallon of milk.
The Yolo County Board of Supervisors this week adopted a Climate Action Plan, however, UC Davis Cooperative Extension alfalfa specialist Dan Putnam questioned the part of the plan that deals with reducing fertilizer use, the Davis Enterprise reported.
Yolo County strives to be at the forefront of the "green movement," according to its website. The county's 2030 General Plan included the requirement to develop a Climate Action Plan.
On Page 29 of the 124-page document, the plan says that cutting alfalfa nitrogen fertilizer 25 percent will result in a .35 percent increase in alfalfa yield (see chart below).
“The alfalfa part of that is just wrong — dead wrong,” Putnam was quoted. ”That’s just nonsense. I don’t agree with that at all.”
Putnam said some of the conclusions in the plan could be explained by "the vagaries of nature."
“It’s one thing if the model spits out (a number), and it’s another if it’s something we can measure in the field. It’s another thing to ‘ground truth’ it," according to Putnam.
Supervisor Duane Chamberlain represents the county’s rural areas, farms alfalfa and is one of Putnam's research collaborators. He voted to approve the Climate Action Plan, but was vocal about his concerns over the underlying science, the Enterprise reported.
"I’d like to see some science in here,” Chamberlain was quoted. “The science is terrible. We don’t have any science. We have modeling. This is people who’ve drawn pictures."
The Woodland Daily Democrat also covered the passage of Yolo County's Climate Action Plan./span>
Yolo County Climate Action Plan