Covering the manure is critical because you don’t want it to be too wet.
Natural products such as these generally do not have high N-P-K numbers, but offer a wealth of readily available nutrients to plants in a living soil.
Foliar feeding is a complex subject, but in general it allows you to supply small amounts of deficient elements to plants (through their leaves, primarily) at the time they need them. Fertilizers applied to the soil before planting may not be available to the plants when they need them most—during peak growth and pod fill. […]
If a plant is not getting the proper amounts of nutrient elements, it may develop certain symptoms, abnormal colors or growth deformities.
Manures are an excellent source of nitrogen.
Soybean production factors out as follows: a 50-bushel crop takes 280 pounds of nitrogen.