What is a recommended method to improve soil moisture before fumigation?

Improving soil moisture before fumigation is crucial for effective treatment, and leaving the previous crop in the ground longer serves this purpose effectively. When crops remain in the soil for an extended period, they can contribute to moisture retention through several mechanisms. Their roots help maintain soil structure, which allows it to hold water more effectively. Furthermore, the presence of organic matter from the decomposing crop can enhance soil permeability and moisture conservation.

Covering soil with a tarp, increasing irrigation frequency, or planting cover crops may also influence soil moisture levels, but they do not directly capitalize on the soil's existing biological activity as effectively as leaving a previous crop in place. For example, tarps can prevent evaporation, but they also may restrict necessary airflow and microbial activity. Similarly, while increasing irrigation frequency can boost moisture levels, it does not always guarantee uniform distribution or soil health. Planting cover crops can also improve soil structure and moisture retention, yet it requires time for their establishment and may not be immediately beneficial depending on the timing relative to fumigation.

In summary, retaining previous crops until closer to fumigation is an efficient way to enhance soil moisture, leveraging the natural capabilities of the soil ecosystem for improved results.