Fertilizer analysis guarantees are based on a minimum amount present on a per cent volume basis.

• A. False
• B. True
• C. Sometimes
• D. Not applicable

Answer: (A)

Fertilizer guarantees are expressed as minimum percentages by weight, not by volume. The label shows nutrients like N, P2O5, and K2O as percent of the product’s mass, not its volume, to keep guarantees consistent regardless of how densely the product is packed or how moisture affects volume. Using weight as the basis prevents variability in nutrient delivery between lots or batches. While liquids can be described by concentration, the standard practice for solid fertilizers is weight-based guarantees, so the statement about volume-based guarantees is not correct.