What is the purpose of leaving the previous crop in the ground longer before fumigation?

The purpose of leaving the previous crop in the ground longer before fumigation is primarily to increase soil moisture. After the previous crop is harvested, allowing it to remain in the field for an extended period enables the soil to retain moisture, which can be beneficial when preparing the soil for fumigation. Adequate soil moisture levels can enhance the effectiveness of the fumigant, as many fumigants require specific moisture conditions to penetrate the soil and control pests effectively.

While enhancing soil nutrient levels, improving soil structure, and helping with pest resistance are valuable agricultural practices, they do not directly relate to the immediate advantages of delaying harvest before fumigation. When soil moisture is optimized, it supports better fumigant performance, ensuring that the treatment is effective in managing pests and diseases in the soil.