Thursday, 24 April 2014

Sensible Technology

They've become a standard piece of equipment on large farms,  and they seem to scare the hell out of a lot of people. I'm talking about the hi-tech sprayers with big wheels, a cab, and long booms that fold up tight to the chassis.  For many they represent all that's wrong with commercial farming, because they only do one thing: spray pesticides. 

If pesticides are necessary, and whether we like it or not, organic or conventional, small garden or big acres,  some are, then we should be glad farmers are investing in these rigs. Two big improvements over the old sprayers dragged behind tractors. The spray nozzles themselves (they determine how much pesticide is applied) can be much more finally tuned, and are controlled by an on-board computer. As the sprayer gets to the end of a row, the computer shuts down spraying on the outside boom as it swings outside the field, leaving hedgerows untouched. More importantly there are separate containers for water and the concentrated pesticide, and again the computer determines the proper mix.  Even better when the work is done there's no excess mixed pesticide to get rid of. Unused is saved for the next time, and the water in the other tank is just that, water. 

And there are better things coming.  Dr. Qamar Zaman, an engineering professor at the Nova Scotia Agricultural College has developed cost effective ways to only apply pesticides just where they're needed, and prevent unnecessary spraying around waterways. 
Some background here:

and here:

And this week a very important report in the Globe and Mail, especially for PEI: better managing fertilizer applications to limit excess nitrates that end up in the water table. This isn't to say that technology can solve our many problems, but the right technology can certainly make things better.

Technology that helps farmers cut waste and make more money

Green Solutions

While working in the commercial fertilizer industry, self-described “Manitoba farm boy” Wade Barnes saw an incredible amount of waste as farmers frequently applied too much fertilizer to their fields.
But after a trip to nearby Fargo, N.D., he was wowed by the use of satellite imagery to identify high nitrogen areas for growing sugar beets and wanted to do something similar for his customers.
Back at the fertilizer plant where he worked, he started to build a program. The farmers loved it, but as it reduced the amount of fertilizer the company’s best customers were buying, it wasn’t good for the fertilizer business.
So “pushed by the farmers” to start his own business, Mr. Barnes co-founded Farmers Edge Precision Consulting Inc. in 2005. The Winnipeg-based company specializes in precision agriculture – including variable rate technology (VRT) that uses satellite imagery to pinpoint when and where to plant and how much to fertilize – to help growers increase crop production and become more sustainable. The company has operations in Canada, the United States, Eastern Europe and South America.
“Once I saw the differences in the areas of the field, the variability, it opened my eyes,” Mr. Barnes says. “I realized how uninformed we were because we didn’t have any information to make decisions. We were just winging it and these farmers were spending millions of dollars on fertilizer. The technology allows farmers to optimize their fertilizers. The whole business of farming has changed.”
Fertilizer is a huge issue for farmers and the environment. Since the use of commercial fertilizer correlates directly to increased yield (generally estimated at between 30 to 50 per cent), farmers want to use enough to ensure a good crop.
But if too much fertilizer is used – particularly nitrogen fertilizer and other crop inputs such as pesticides and herbicides – the runoff can go into the groundwater, polluting water supplies and damaging natural habitat. The increased use of nitrogen fertilizer has also resulted in the formation of atmospheric nitrous oxide (N2O), a potent greenhouse gas contributing to stratospheric ozone depletion and global warming.
But changes in how fertilizer is used – when fields are fertilized and how much is used – can reduce N2O emissions, according to research at the University of California, Berkeley.
“When the harvest is done, the goal should be that very little fertilizer is left in the ground,” Mr. Barnes says. “ If technology can bridge that gap, to allow the farmer to make good informed decisions about what he’s doing, the environment is going to benefit from that. They won’t overfertilize. The technology essentially allows farmers to be green, but, at the end of the day, to be green with a purpose and make a lot more money by doing it.”
Recently, Farmers Edge has begun to focus on water, using satellite imagery and real-time information to determine the right amount of irrigation. With droughts occurring in many parts of the world, water is a valuable commodity.
“We build modules into our system so that from a satellite you can start assessing how much nitrogen a crop needs or how much water,” Mr. Barnes says. “So we can look at a crop in season and say, that part of the field needs water and that part doesn’t. Then we segregate the areas out, fill the prescription map and send it to the irrigation system to put on the exact amount of water.”
Hortau Inc. has also developed high-tech solutions to irrigation, but with an approach centred on the plants. The company, based in St. Romuald, Que., with offices in California and Colorado, offers wireless, Web-based irrigation management systems to about 1,000 growers throughout North America. Their solar-powered technology reports back to the farmer how plants are doing in real time, before plant stresses such as drought can negatively affect the crop.
Agriculture accounts for about 70 per cent of water used in the world today. Jocelyn Boudreau, an agricultural engineer who co-founded Hortau in 2002, estimates its technology can save roughly 25 to 30 per cent of that water, as well as the same amount of energy used for pumping the water for irrigation.
“Most farmers tend to overwater to be on the safe side,” Mr. Boudreau says. “You can hurt the yield just as much by overwatering as underwatering and the excess water can push the fertilizers down to where the crop can’t use them. We’re providing them with a tool where they can increase their productivity so they can grow more just by avoiding plant stress due to lack of water or overwatering. At the same time, they use less water, less energy and avoid leeching fertilizers into the water table. It’s a very good balance.”
That’s a huge advantage for the environment, as well as for the farmers. While the cost to use Hortau’s technology can be anywhere from $10 to $100 an acre each year, Mr. Boudreau says it’s cost effective with the payback usually covered by the first crop. In some areas where there’s restricted water, such as Colorado and Nebraska, or drought-stricken California, Mr. Boudreau says their technology is seen as critical.
“If you only have so many inches of water that you can apply on your field for that year, how do you spread it out?” Mr. Boudreau asks. “Depending on the growth stage of the crop, the season, the weather conditions – it’s a tricky assessment. You can’t do that just by eyeing it. A precision tool comes in very handy.”
Increasingly, sustainability is good business for farmers. Many major food companies have a sustainability mandate, so they only want to do business with growers who are sustainable. That’s created a lot of push, not just into VRT or crop fertilizer efficiency or water use efficiency, explains Mr. Barnes, but farmers also need to prove they’ve done it. Part of Farmers Edge’s mandate in developing technology is to build a computer program into the farm equipment so that they’re logging information back, so farmers have data to back up their work.
“There’s a lot of research being done behind the scenes to validate farmers – to find out how green these practices actually are,” Mr. Barnes says. “So we’re working on a new initiative, [with Alberta’s agricultural producers, Canadian Fertilizer Institute and Capital Power Corp.] regarding carbon offsets. When farmers do these practices, they’re being environmentally efficient and creating a carbon offset. We’re working on logging that data and being able to crunch those numbers to provide how much of an impact they’ve made on a reduction of carbon.”
The hope is the farmers will be able to sell that to some of the Alberta industries that need carbon credits. Also, if farmers makes enough money off the carbon credit to pay for technology, they are more apt to adapt it faster – and the more farmers that adapt to the technology, the better it is for the environment.
“It’s a circle that could be effective for everybody,” Mr. Barnes says.“We’ve always believed that when growers do VRT, they could be 25 to 35 per cent more efficient – but it was important for the scientific community to step up and do the work and say, ‘Yes, that is accurate, and that is making a difference.’ We think you’re going to see a lot more adaption to this, not only in Canada but all over the world.”

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