A field experiment was performed in calcareous brown soils of Fars province of Iran during 2009 to study Zn-B interaction on their concentrations in maize. Five levels of Zn (0, 8, 16 and 24 kg ha−1 to soil and 0.5% foliar spray) and four levels of B (0, 3, and 6 kg ha−1 to soil and 0.3% foliar spray) were tried in randomized block design. For increase in leaf Zn concentrations and thus addressing Zn deficiency, foliar application proved more effective than soil application due possibly to applied Zn getting fixed in the soil. Zinc concentration in leaf was intermediate; but leaf B content was sufficient to high. There was antagonism between Zn and B. With increasing Zn content, the higher rate of B was needed for increasing B concentration in leaf. Boron foliar spray helped Zn affecting the increase in B concentration in leaf.
Deficiency, Foliar spray, Synergism, Antagonism, Boron, Zone, Maiz
