What is one disadvantage of injecting manure?

Injecting manure into the soil does indeed have the disadvantage of increasing soil compaction risks. This method involves using heavy machinery to introduce manure beneath the soil surface, which can contribute to the compaction of the soil in the process. Soil compaction is a concern because it can reduce water infiltration, hinder root growth, and diminish overall soil health by restricting air movement within the soil.

While injecting manure is a very effective method for nutrient incorporation, it is crucial to consider the potential for soil structure damage, especially in wet conditions or on soils that are already susceptible to compaction. This aspect must be managed carefully to ensure the long-term sustainability of the soil's health and productivity.

Other options, such as costs or odor issues, while relevant in the overall discussion of manure application techniques, do not directly address the specific physical impact on soil structure that comes with the act of injecting.