What is the primary purpose of non-soil fumigation?

The primary purpose of non-soil fumigation is to eliminate pests, pathogens, and weeds without directly applying fumigants to the soil. This method is particularly useful in situations where the target organisms are not in the soil itself but may be found in structures, containers, or on plant surfaces. Non-soil fumigation allows for effective pest management while minimizing potential damage to the soil ecosystem and avoiding unwanted interactions with soil nutrients.

The other options focus on enhancing soil or plant health, which is not the primary goal of non-soil fumigation. While improved soil fertility, plant growth rates, and beneficial microorganism cultivation are essential considerations in agricultural practices, they do not directly relate to the non-soil fumigation technique, which is specifically aimed at controlling problem organisms through gas diffusion rather than enhancing growth or fertility.