The limitations of traditional phosphorus fertilizers.
- Just 20% of applied phosphorus is available the year it is applied.
- One reason is that phosphorus is easily tied up in soil.
Another problem is mobility. In the soil, phosphorus typically moves only 1/10 of an inch from a fertilizer prill.
When a plant’s roots are not near a fertilizer prill, early season deficiencies can occur.
- In addition to the tie-up and mobility challenges, cool and wet soils slow root growth. In these conditions, it takes longer for young roots to grow to a P fertilizer prill.