Role of Sulfur in Citrus Production
Sulfur is an important component of enzymes and other proteins, and is required for chlorophyll formation in citrus production.
Sulfur and yield
Sulfur has a direct effect on yield. In trials, S has provided yield improvements of between 23-57% on S deficient soils.
Sulfur effect at growth stages
| Stage | Sulfur effect |
| Fruit Set | To improve fruit set and fruit retention |
See more on Citrus Growth Stages.
General guidelines for Sulfur application
Relatively low levels of sulfur are needed in citrus production because removal is low. However, when supplies are limiting, sulfur has a direct effect on citrus yield. There is often enough sulfur in N-P or N-P-K fertilizers, micronutrient formulations or irrigation water to meet crop needs.
Sulfur deficiencies in Citrus
Sulfur deficiency symptoms are often very similar to those of N deficiency. The youngest leaves become yellow over the whole leaf. Necrotic lesions may appear which cause early leaf fall. Fruits fail to reach full size and have thicker peels than usual.
