Use of the stable isotope ⁵⁷Fe to track the efficacy of the foliar application of lignosulfonate/Fe³⁺ complexes to correct Fe deficiencies in cucumber plants

Abstract

Lignosulfonates did not require surfactants for their application; they did not burn the leaves, and had a stimulating effect on the vegetative growth of the plants. So these by-products could be a good alternative when applied through foliar sprays for cucumber plants.