Waste Not

Mar 1, 2007 12:00 PM, By Karen McMahon

Finding manure

Growers who want to buy manure need to approach a livestock producer. If the livestock producer has manure available, then the grower needs to calculate if he can afford to transport it to his farm. The cost to haul manure more than several miles can override its nutrient value. A surcharge of $.001/gal./mile is typically added for extra miles, totaling between $3 to $6/acre for one mile, according to a report by Kelvin Leibold and Tom Olsen, Iowa State University (ISU) Extension.

Farmers interested in securing manure long term may consider another option. McNeil says, “Farmers can contact companies looking for more hog grower space and sell five acres of land for a building. Then they will have an option for the manure. There will be a lot of hog buildings built this year. I haven't seen much tapering back.”

Using manure

Once a grower finds manure to buy, he must correctly apply it to extract the most crop benefit. This takes testing. The grower should take soil tests to see what nutrients are needed for top yields, and the manure should be analyzed. According to reports from ISU, manure from one facility can vary from year to year if animal diets change — if dried distiller's grains are added, for example.

Manure from different production units varies, too. Swine grower units with deep pits will contain the richest manure and offer the highest nutrient value per gallon. Lagoons contain the lowest value manure with few nutrients per gallon.

Nearly all liquid manure today is injected into the soil. This practice eliminates odor problems, reduces residue disturbance, and puts the manure nutrients where they will do the most good. Manure works into conservation tillage practices, too.

Soil compaction can be a problem with manure application. ISU recommends applying manure when soil moisture is below field capacity to reduce the compaction. Other practices to cut compaction are to reduce weight on each axle, use correct tire inflation rates and control traffic patterns.

Supplies tighten

Because the popularity of manure is expected to remain strong, growers interested in using manure, especially hog manure, should locate a source and lock in their orders now. Although more hog buildings will be built this summer, high grain prices may slow expansion and the manure market will tighten. Add to this situation high fertilizer prices, and manure's value will rise a long way from its former “waste” status.

A hard day's night

NEIGHBORS DALE Wills and Larry Krohn started commercially applying manure from their Nicollett, MN, farms 10 years ago. Today, their manure application business includes five people working around the clock from late September until late November and for a few weeks before planting.

Their business, D&L Pumping, pumps manure for 38 different clients to hundreds of different fields. Some of the clients sell manure to other farmers, adding to an endless array of corn and soybean stubble. Last year, they pumped manure onto 7,000 acres.

“This is not a job you can start at 20 years old and go until you're 60,” Wills reports. “It is a physically tough business.”

Krohn recalls one especially strenuous week “when I didn't get into a bed for eight days. We slept for two to three hours at a time in either a recliner or pickup.”

It takes time and hard work to apply the 50 million gallons of manure that D&L Pumping injected last year. They could take on even more acreage, but time has limited their business for three years. A heavy demand for commercial application created the growth in their venture from 10 million gallons the first year to the current level in just eight years.

It also takes experience and good records to keep mistakes at a minimum, especially when moving hose in the middle of the night. But Wills and Krohn say the application is well documented with location, acres covered, gallons applied, climate conditions and date.

For application, they use a pump and hose drag system to move manure out to the fields from a manure pit or lagoon. The crew rolls out 6-in. hose up to three miles long across fields, ditches and farms. A tractor and a 34-ft. injector unit with 16-in. sweeps set on 2-ft. spacing are hooked to the hose to apply the manure 4 to 6 in. deep into the ground.

The fee is determined according to a price per gallon applied. Additional fees are charged when the application is more than one mile away and if the rate is less than 4,000 gal./acre. For example, the rate for applying hog manure from a grower unit at 3,000 gal./acre is about $35/acre, Wills says. Dairy manure that requires 10,000 gal./acre will cost between $60 and $80/acre.

During pumping, the Wills and Krohn crew take frequent samples of the manure, which they give to the owner for nutrient testing. Wills says test results from most labs are returned in a few days. Although the results come after the application, growers later can make nutrient adjustments with commercial fertilizer if needed. Generally, manure test results are similar to the previous year's results, which are the basis for the current application rates.

Wills and Krohn are certified manure applicators in Minnesota, which requires attendance at workshops and passing an exam.