There are many thoughts regarding how much nitrogen is lost from applying urea on pastures and hay fields. If applied incorrectly, up to 40 percent of the nitrogen applied as urea can be vaporized and lost as a gas.
A high percentage of the grazing land in our area is native grass. Most ranchers do not fertilize native grass because it is widely thought that it is unprofitable to do so. In fact, one of the appealing characteristics of native grass systems is that they do relatively well with minimal inputs.
Let's say you look at the results from your soil sample and see there is a recommendation for lime. You check around and discover this is going to cost $40-$50 per acre. A normal person would question whether the value received from liming is worth the cost.