What does the term "burn" refer to in the context of fertilizers?

In the context of fertilizers, the term "burn" specifically refers to the damage that can occur to plants when they are exposed to high salt index fertilizers. When fertilizers contain high concentrations of salts, they can pull moisture away from plant roots, leading to dehydration and, in severe cases, plant death. This effect can be particularly pronounced under conditions of drought or high heat, where plants are already stressed and unable to manage the excess salts.

When using fertilizers, it is important for applicators to understand the salt index of their products and to apply them at appropriate rates to minimize the risk of "burn" to the plants. This awareness helps ensure plant health and maximizes fertilizer effectiveness, allowing crops to thrive rather than suffer damage.