True or False: Soil samples for PSNT for corn should be dried immediately.

Soil samples for a Pre-Sidedress Nitrogen Test (PSNT) for corn should indeed be dried immediately to ensure accurate nutrient analysis. This is because moisture in the soil can lead to microbial activity, which can alter the nitrogen levels in the sample before testing. Drying the samples prevents changes that might occur due to microbial processes and helps maintain the integrity of the nitrogen measurement. This practice is crucial for making informed decisions about nitrogen fertilization, ensuring that corn receives the right amount of nutrients at the right time.

The incorrect options suggest variability based on weather conditions or absence of drying altogether, which implies that the timing of drying might be less critical than it truly is. However, to achieve reliable results regardless of external conditions, immediate drying of the soil samples is essential for accurate nutrient evaluation.