ISA Certified Arborist Practice Exam 2025 – All-in-One Resource for Comprehensive Exam Success!

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Which type of fertilizer includes Nitro, Phosphorus, and Potassium in its composition?

Urea-formaldehyde

Leaching

Complete Fertilizer

Complete fertilizers contain Nitrogen (Nitro), Phosphorus, and Potassium (Potash) in their composition. This type of fertilizer provides a balanced combination of essential nutrients for plant growth and development. Option A, urea-formaldehyde, is a slow-release nitrogen fertilizer. Option B refers to leaching, which is the process of nutrients being washed away from the soil by water. Option D, organic fertilization, involves the use of organic materials to improve soil fertility, but it may not always contain the specific combination of Nitrogen, Phosphorus, and Potassium found in complete fertilizers.

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Organic Fertilization

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