The numbers in Table 2 are averages. Manure nutrient values can vary widely from farm to farm. If you want more information about testing and estimating the nutrient value of manure from your farm, read “Fertilizing with Manure,” available from Washington State University Extension.
How Do I Apply Manure?
For any field larger than a garden, a manure spreader is a great timesaver. Manure spreaders vary in size, depend- ing on the amount of land you need to spread and the size of your tractor.
By calibrating your manure spreader, you can get a good idea of how much manure you are applying. The principle of calibrating a manure spreader is the same as calibrating a fertilizer spreader, a planter, or a sprayer. The simplest method is to spread tarps on the ground and weigh the amount of manure that falls on each tarp as the spreader passes over it. If you have access to truck scales, you can weigh a full spreader, apply a load to your field, weigh the spreader