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Fertilizer Storage

Hanson concrete wall bulk fertilizer storage system. These photos shown was for a large grain company for Urea storage in an existing wooden stick built building. Notice the low clearance between our 12' containment wall and the rafters. We are the best option to put new life in an old building.

TypeGradeAngle of Repose
Prilled Urea 46-0-0 27-28
Granular Urea 46-0-0 34-38
Granular Ammonium Sulfate 21-0-0 36-38
Crystalline Ammonium Sulfate 21-0-0 29-36
Prilledd Ammonium Nitrate 34-0-0 29-38
Granular Diammonium Phosphate 18-46-0 27-37
Granular Monoammonium Phosphate 11-55-0 28-37
Powdered Monoammonium Phosphate 10-50-0 30-34
Granular Triple Superphosphate 0-46-0 28-35
Granular Potassium Chloride 0-0-60 32-41
Coarse Potassium Chloride 0-0-60 31-35
Standard Potassium Chloride 0-0-60 28-32
Granular Potassium Chloride 0-0-50 28-35
Phosphate Rock (Various Rock Sources) - 30-35

Concrete bunker for on-farm fertilizer storage

By Dick Hagen

$39,000 savings with $230,000 structure

Bunkers have a diversified history in American agriculture.

Quick and convenient storage for corn silage started with "bunker silos" 30-plus years ago. Construction materials were pretty much whatever was convenient in those early days. That might mean discarded railroad ties, old sheets of plywood, old utility poles, hay bales or even just piled up dirt.

Buat as the quality of feed product got better, so did the quality of bunker. When ear-corn silage, chopped alfalfa, hay, total mixed rations and shelled corn moved into bunker storage, bunker construction rapidly got substantially better. Concrete soon became the prime catalyst.

So would a bunker work for bulk fertilizer too? Sure, if it's got water-tight walls, a framed steel water-tight roof and 6-inch concrete floor. Stanley Farms of Grygla, Minn., has just such a bunker.

Todd Stanley general manager of this 12,000-acre operation headquartered in Beltrami County about 38 miles south of Roseau, said, "it looks much like any fertilizer plant you see at your local co-op."

Well, not quite. This one constructed by Hanson Silo Co. of Svea, Minn., measures 60-feet wide, 104-feet long, has 13-foot concrete walls - solid concrete T panels measuring 12-feet tall, 7-feet wide, 7.5-feet long and each weighing 13,000 pounds - and features five seperate interior bins, each capable of handling 250 tons of fertilizer. Including the alley, it has a total storage capacity of 1,500 tons of fertilizer.

That's right: 1,500 tons of fertilizer in a concrete bunker.

A framed, 8-foot stud wall sits right on top of the concrete walls to carry that roof. A brief visit with Stanley soon convinces you that he thrives on teh challenge of being on the "cutting edge" of new technologies - especially cost-effective technologies.

Their 12,000 tillable acres includes 4,000 acres spring wheat, 4,000 acres soybean and 2,000 acres growing various grass seeds such as perennial rye grass for golf course, roadside and lawn mixes. Last year they had 160 acres of 75-day maturity corn that yielded 155 bushels per acre. Conservation Reservce Program land claims another 1,000 acres.

That much cropland gobbled up about 1,300 tons of dry fertilizer in 2012, generating about a $30 per ton discount price. We're talking a $39,00 savings in just one season on the fertilizer bill, plus that all-important 24.7 access to their fertilizer.

They used to store fertilizer in pole buildings after Stanley's dad moved from bagged fertilizer to bulk in 1970. "For several years we bought blends," he said, "then we switched to blenzding our own (50-50 phosphate and potash). We'd load one semi of phosphate, for example, into the other semi if potash then unload this blend into the shed and with skid loader moved it into a bin in this pole shed."

What triggered the concrete bunker idea? Those salt sheds used by the highway department caught Stanley's eye.

"Back when I was feeding cattle I recalled those Hanson silo ads showing different uses of their concrete bunkers. So I called them, told them what I was needing," Stanley said. "Their sales rep said he'd check with their engineers and get back to me. He also sent some photos of different salt sheds they've built. I liked what I saw so we struck a deal."

Stanley had earlier bought a used fertilizer blending unit that was available from a fertilizer plant that was being decommissioned.

A 16-by-16-foot sliding door at one end of the bunker also accommodates the scale and fertilizer blender unit. In a Feb. 21 telephone visit with The Land, Stanley said about two-thirds of his fertilizer was already in the bunker, with the rest being delivered the first week in March.

Besides this fetilizer bunker, he also built five hopper bins, a seed trater unit (for spring wheat and soybean seed) and special conveyor belts to load either seed or fertilizer: All this os their special tender truck gets loaded with both seed and fertilizer - phosphate, potash and ammonium sulfate. Once seeding starts, it's a 24/7 operation so the efficiency of one-stop loading for both products is critical. They use anhydrous ammonium for their nitrogen source for wheat and corn; the grass seed fields get urea.

Stanley Farms spent about $425,000 for the entire structure and special equipment. The concrete fetilizer facilty represents about $230,000 of that total package.

A 60-foot-wide air seeder does teh planting. This rig runs with a five-tank cart accommodating 980 bushels when loaded. Hitched behind this seeder is a fertilizer trailer with thress sepearte tanks for on-the-go variable fertilizer application, depending upon the GPS-directed monitor.

That great success with corn last year is likely triggering a few more acres for 2013. Stanly Farms is also growing 350 acres of flax for a "fiber-to-fabric" prokect in South Carolina.

"We're growing the flax seeds for this prokect; South Carolina farmers will be growing the fiber," said Stanley, who added that flzx is a fairly common crop around Roseau, Minn.

Stanley Farms dates back to 1937 when his Norwegian grandad bought 160 acres for buildings. Today Todd, his son Bill, and cousin Mike Jelle, are operational managers of Stanley Farms. Todd's wife, Debra, is also a key business partner. Todd and Debra started farming on their own in 1975, and built up to about 3,500 acres by the late 1990s.

"My parents also farmed about 3,500 acres and when they retired in 1998 we rented their farm so that doubled us to 7,000 tillable acres. Since then it's just been bits and pieces getting us up to where we are today," Stanley said.

So why such diversity at Stanley Farms? "We don't want this job to get boring," he chuckled.


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