With fertilizer prices remaining a significant concern for crop producers, managing potassium (K) and phosphorus (P) inputs efficiently has become a top priority for farm operations heading into the 2026 growing season. Potash (potassium chloride) and phosphate fertilizers such as monoammonium phosphate (MAP) and diammonium phosphate (DAP) have experienced price volatility in recent years, driven by global supply chain disruptions, geopolitical factors, and energy costs.
Agronomists recommend that farmers start with up-to-date soil testing before making any fertilizer purchasing decisions. Soil tests provide a baseline for nutrient levels and allow producers to apply only what is needed, avoiding over-application that wastes money and can harm soil health. University extension services consistently advise testing every two to three years at minimum, and annually on fields with a history of nutrient imbalances.
When prices are elevated, a common strategy is to prioritize maintenance applications — keeping soil nutrient levels from declining — rather than building levels on all acres simultaneously. Producers may choose to focus higher rates on their most productive fields where the return on investment is greatest, while applying reduced or no fertilizer on lower-yielding ground. This targeted approach helps manage input costs without sacrificing yield potential on prime acres.
Manure and other organic nutrient sources can serve as partial substitutes for commercial potassium and phosphorus fertilizers. Livestock operations or farms with access to manure can significantly offset purchased fertilizer needs, though proper nutrient accounting and application timing are essential to maximize efficiency and minimize environmental impact. Composted materials and biosolids are also increasingly considered where regulations permit.
Experts also caution against skipping potassium and phosphorus applications entirely for multiple consecutive years, as soil nutrient levels can decline to the point where crop yield and quality are significantly affected, making recovery more costly in the long run. Balancing short-term cost savings with long-term soil productivity is the key challenge farmers face when navigating high fertilizer prices.
