UACES Facebook Properly Calibrate Manure Spreaders - March 2011

Properly Calibrate Manure Spreaders - March 2011

You Tube - Link to watch video on You Tube.Link to transcript

Audio/Video Script:

[Title Slide - Properly Calibrate Manure Spreaders. Your Arkansas Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board.]

[Dr. Leo Espinoza - Extension Soil Scientist]  As you know Arkansas produces a significant amount of litter due to the magnitude of the poultry industry in the state. [Picture of poultry litter mounds.] For years, we have looked at the potential of using poultry litter as a fertilizer source for our crops.

[Dr. Espinoza] While poultry litter can be a good source of nutrients, chicken litter is not fertilizer. In order to take full advantage of this material there are a couple of things we need to do.

[Slide - Picture of piles of poultry litter. Maximize Poultry Litter – Know nutrient concentrations.] First we need to have an idea of the concentration of nutrients in the material we are going to use. And we need to analyze the litter as close to planting as possible. The cost of analyzing the litter is 20 dollars per sample. The table shows the average of a hundred samples received by the diagnostic lab. The table shows an average of 55, 60, 63 per ton.

The use of the average can significantly under or over estimate the amount of nutrients in the material. For instance the K levels can range between twenty-five and ninety-one pounds per ton.

 The analysis will also give you an idea of the moisture content. You don’t want to spread a material that is half water. Note that the table shows moisture content as high as 64 percent.

Statistics of 100 samples received by the Diagnostic Lab
during 2008 and classified as "broiler" litter.

 

Moisture
%

N
lb/T

P2P5
lb/T

K2O
lb/t

Average

34

55

60

63

Range

15-64

24-88

30-115

25-91

The other very important difference from chemical fertilizer has to do with the way it is applied. [Picture of a spreader. Proper spreader calibration is very important!] We need to make sure that the spreader trucks are properly calibrated.

[Pictures of spreaders. Properly calibrate spreader]  Research in Colorado with ten spreaders show that one of the spreaders had one side with seven-and-a-half times the amount of litter on it, compared, on one side, compared to the other side. [Picture of litter being loaded into a truck. Properly calibrate spreader] They also reported swath width ranging from seven-and-a-half feet to sixteen-and-a-half feet with an average of eleven feet.

[Dr. Espinoza]  So in summary we need to test the litter for the amount of plant available nutrients and we need to make sure the spreaders are calibrated.

[Narrator] Your Arkansas Soybean Podcast is a production of the University of Arkansas Division of Agriculture and was funded in part by the Arkansas Soybean Promotion Board. For more information about soybean farming in Arkansas, contact your local county Extension office.

[Title slide - For more information contact your local county Extension office. Your Arkansas Soybean Podcast, University of Arkansas Division of Agriculture, Arkansas Soybean Promotion Board]

 

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