Which of the following is NOT a commonly available slow-released fertilizer?

• A. Osmocote granules
• B. Jobe's Spikes
• C. Liquid fertilizer
• D. Agriform tablets

Answer: (C)

Liquid fertilizers are typically formulated for quick absorption and immediate nutrient availability to plants, making them unsuitable for slow release. They provide nutrients in a form that plants can use almost right away, which is ideal for quick nutrient delivery but not aligned with the principles of slow-release fertilization.

In contrast, Osmocote granules, Jobe's Spikes, and Agriform tablets are designed to release nutrients gradually over an extended period. These slow-release options are beneficial for promoting steady growth and reducing the frequency of application, providing a consistent nutrient supply without the risk of leaching most commonly associated with quick-release fertilizers.

Thus, identifying liquid fertilizer as the choice that does not fall into the category of commonly available slow-release fertilizers is accurate.