Fertigation is best described as what?

• A. Spraying fertilizer on leaves
• B. Injecting fertilizer into plant stems
• C. Mixing fertilizer into soil and letting it water in
• D. Applying fertilizers through an irrigation system

Answer: (D)

Delivering nutrients through irrigation water is fertigation. This means you dissolve fertilizer in the irrigation water and push it through the irrigation system so the nutrient solution reaches the root zone as the plants are watered. This approach lets you control exactly how much fertilizer is applied, when it’s delivered, and where it goes, giving uniform distribution and often better efficiency and reduced waste. Spraying fertilizer on leaves is foliar feeding, not fertigation. Injecting fertilizer into stems is not how fertigation typically works and can harm the plant. Simply mixing fertilizer into soil and watering it in doesn’t use the irrigation system to distribute nutrients, so it isn’t fertigation in the same sense.