Correction of potassium deficiency of citrus with potassium nitrate sprays David V. Calvert , Rodger C. Smith J. Agric. Food Chem. , 1972 , 20 (3), pp 659–661
Citrus leaves analyzing 0.5 to 0.8% K are not uncommon in groves on calcareous soils, although maximum yield of citrus on these soils is associated with leaf K levels of over 1.0%. Ac-cumulation of Ca in the citrus leaves apparently results in a physiological deficiency of K when grown on these soils.
Reasons for using potassium nitrate in a foliar spray. Potassium nitrate can be used for one or more of the following reasons: To prevent the occurrence of nutrient deficiency before the first deficiency symptoms appear. This is especially the case when foliar analysis shows lower nutritional levels than the desired optimum levels. To correct …
Foliar application of potassium nitrate or mono-potassium phosphate can be very effective and rapid to correct K deficiency. The recommended foliar K spray for mature citrus trees is 8 lbs K 2 O/acre per application. Foliar spray application of K has been demonstrated to increase fruit size. Foliar-applied K has also corrected K deficiency of citrus on …
Correction of potassium deficiency of citrus with KNO 3 sprays. Journal of Agricultural Food Chemistry 20, 659-661. Journal of Agricultural Food Chemistry 20, 659-661. Chapman, H.D., 1960.
plications Supplemental nutrient sprays have been shown to be effective in correcting K deficiencies for citrus in calcare ous soils (Calvert, 1969, Calvert and Smith, 1972). Calvert (1969) also reported that foliar sprays of potassium nitrate (KNO3) were more effective in rapidly increasing the K con tent of leaves than ground applied fertilizers.
Foliar nutrient sprays can provide quick correction of deficiency and improve tree color and vigor if indeed that is the reason trees were performing poorly in the first place. potassium deficiency can be corrected at this time of the year by foliar sprays of potassium nitrate when sufficient material is applied. Solutions for Citrus
Foliar potassium fertilization has been successful for citrus and other fruits (Uriu et al., 1980, Stebbins, 1977; Diver et al., 1985; Calvert, 1969; Page et al., 1963; Embleton and Jones, 1972). The general purpose of this experiment was to provide potassium by foliar KNQ3 sprays on ’Hass’ avocado trees.
OTASSIUM DEFICIENCY OF CITRUS in California had not been recognized wior to about 1960. Since then, experi- The nitrogen in the potassium nitrate sprays supplies some nitrogen to the tree, possible correction of deficiencies in mid-season; application with