Influence of soil moisture level on apple iron chlorosis development in a calcareous soil

Eight apple genotypes were grown in a calcareous soil to evaluate relative Fe deficiency chlorosis susceptibility of apple rootstocks. Two soybean genotypes, known to be chlorosis-resistant and-susceptible in wet calcareous soils in Iowa and Minnesota, were used to calibrate the response of the apple genotypes. Two sites and two soil-water levels were used because high soil water is known to induce chlorisis in susceptible soybean and citrus cultivars.