Commodity Fumigation License Practice Exam

What is the optimal soil temperature range for effective soil fumigation?

1. 30-50 degrees

2. 40-60 degrees

3. 50-70 degrees

4. 70-90 degrees

The correct answer is: 50-70 degrees

The optimal soil temperature range for effective soil fumigation is 50-70 degrees Fahrenheit. This temperature range is crucial because it facilitates the volatilization of the fumigant, allowing it to penetrate the soil effectively and target pests, pathogens, and weeds present in the soil. Temperatures within this range ensure that the fumigant maintains its efficacy, as cooler temperatures can slow down the process and reduce the effectiveness of the treatment. Conversely, higher temperatures may lead to rapid volatilization, which can result in inadequate concentrations of the fumigant being available at the target depth for effective pest control. Therefore, maintaining soil temperatures within the 50-70 degrees range is essential for maximizing the success of soil fumigation operations.