Hazelnut shells in Orchards
Hazelnut processors are supplying shells for orchard application, and farmers are adopting this practice for its short‑ and long‑term agronomic benefits. In the short term, shell applications can slow soil drying by reducing surface evaporation and can minimize mud and wet‑soil issues during field operations. Over time, shells increase soil organic matter, thus improving moisture‑holding capacity, buffering pH changes, enhancing soil structure, and increasing nutrient cycling.
Many farmers are unsure of their application rates, which is important for adjusting spring fertilizer programs. Wilbur Ellis research has shown that additional spring nitrogen (N) is required to offset microbial N immobilization during shell decomposition, while potassium rates may be reduced because K in shells is readily leached into the soil rather than organically bound.
If you are using shells in your orchard, use the photo below to estimate the application rate of dry shells per acre.
Work with your Wilbur‑Ellis Agronomist to evaluate whether spring fertilizer adjustments are needed.
