Micronutrient deficiencies pose health problems for a third of the world's population. Recent trials determined that foliar application, applying liquid fertilizer directly to leaves instead of the soil, boosted the zinc content of wheat grain by up to 50 percent Between 2012 and 2019 this team tested different methods to biofortify wheat in 11 field trials in zinc-deficient soils. The effects of applying different doses of fertilizer to the soil (up to 10 kg per hectare) were evaluated, in addition to the results of applying different doses of zinc by spraying the plant in various phenological stages of the wheat's growth.Antonio Sánchez, María del Carmen del Campillo and Vidal Barron. Image: University of CordobaWhile application to the soil was not very effective, foliar application, or feeding, was shown to be a very efficient strategy to increase the zinc content in plants, \"augmenting the concentration in grains up to 50%,\" says the researcher. In addition, if at some point wheat were purchased based on its nutritional content, growers could see increases in their profits.