Some plants are listed under two categories because of differences among varieties and growing conditions. Plant culture is also important in the control of iron chlorosis. Avoid saturated soil conditions by reducing watering or by installing drainage systems, especially with susceptible trees and shrubs. Aerate compacted areas around the base of affected vegetation. Also, avoid using plastic sheeting as a mulch for susceptible plants, since it restricts oxygen movement into the soil.
Several methods are available for treating iron deficiency.
Foliar treatments produce a rapid but incomplete response, while a soil or trunk treatment will last longer. Soil treatments are not economical for large areas of relatively low-value crops such as corn. Iron chlorosis in field crops should be treated with a foliar spray. Table 2 lists some advantages and disadvantages of different iron chlorosis control methods. Often, one method will work well in one area but not in another due to variations in soil conditions and species susceptibility.