02166naa a2200253 a 450000100080000000500110000800800410001902400350006010000190009524500640011426000090017852014330018765000250162065000200164565000170166565300170168265300310169965300190173065300270174970000250177670000160180170000220181777300730183916319542014-08-20       2009    bl uuuu     u00u1 u    #d7 a10.1080/019041609028728262DOI1 aFAGERIA, N. K.  aFoliar fertilization of crop plants.h[electronic resource]  c2009  aEssential plant nutrients are mainly applied to soil and plant foliage for achieving maximum economic yields. Soil applicationmethod is more common and most effective for nutrients, which required in higher amounts. However, under certain circumstances, foliar fertilization is more economic and effective. Foliar symptoms, soil and plant tissue tests, and crop growth responses are principal nutrient disorder diagnostic techniques. Soil applications of fertilizers are mainly done on the basis of soil tests, whereas foliar nutrient applications are mainly done on the basis of visual foliar symptoms or plant tissue tests. Hence, correct diagnosis of nutrient deficiency is fundamental for successful foliar fertilization. In addition, there are some more requirements for successful foliar fertilization. Foliar fertilization requires higher leaf area index for absorbing applied nutrient solution in sufficient amount, it may be necessary to have more than one application depending on severity of nutrient deficiency. Nutrient concentration and day temperature should be optimal to avoid leaf burning and fertilizer source should be soluble in water to be more effective. Foliar fertilization of crops can complement soil fertilization. If foliar fertilization is mixed with postemergence herbicides, insecticides, or fungicides, the probability of yield response could be increased and cost of application can be reduced.  aPlant micronutrients  aplant nutrition  aFertilizante  aAnnual crops  aFoliar deficiency symptoms  aMicronutrients  aSolution concentration1 aBARBOSA FILHO, M. P.1 aMOREIRA, A.1 aGUIMARÃES, C. M.  tJournal of Plant Nutrition, Londongv. 32, n. 6, p. 1044-1064, 2009.