Certified Crop Advisor Practice Exam

Which condition is most likely to lead to a reduced seedling rate?

1. Optimum soil moisture

2. Excessive fertilization

3. Dry soil conditions

4. Low seed quality

The correct answer is: Optimum soil moisture

The condition most likely to lead to a reduced seedling rate is related to dry soil conditions. When soil moisture is insufficient, seeds may not have the necessary hydration to germinate effectively. This lack of moisture can hinder the processes necessary for seed activation, such as enzymatic activity and nutrient uptake, ultimately leading to lower germination rates and poor seedling establishment. In contrast, optimum soil moisture provides the ideal environment for seed germination and seedling emergence. Good moisture levels facilitate proper seed swelling and enzymatic activity, ensuring effective growth. Excessive fertilization can lead to nutrient imbalances or toxicity, but it is not as direct an impact on seedling rates as dry conditions. Low seed quality can also affect germination, but dry soil is a critical factor that can universally compromise the seedling establishment process.