Which of the following conditions is not recommended for fertilizer application?

Applying fertilizer under drought conditions is generally not recommended because the lack of moisture can significantly impede the nutrient absorption by plants. In drought, the soil is often dry, and plants are stressed, making them less capable of utilizing fertilizers effectively. Fertilizers require moisture to dissolve and move into the root zone where plants can take them up. Without adequate water, the intended benefits of the fertilizer can be lost, and it may lead to nutrient runoff or leaching without benefiting the plants.

On the other hand, cold weather, particularly when involving temperatures below freezing, can disrupt the seasonal soil microbial activity essential for breaking down fertilizers into forms that plants can take up. Applying fertilizers in such conditions can be ineffective for plant growth. Fertilizing before a light rain can be advantageous because the precipitation helps dissolve and incorporate the fertilizer into the soil, making nutrients readily available for plant uptake. High humidity may not pose a direct risk to fertilizer application, but moisture levels should be considered in conjunction with other factors at the time of application.