Potassium (K) fertilizer is commonly added to improve the yield and quality of plants growing in soils that are lacking an adequate supply of this essential nutrient. Most fertilizer K comes from ancient salt deposits located throughout the world. Soil application rates should be based on a soil test, foliar analysis, or both. Percent terminals flowering after potassium nitrate foliar treatments of seedling mango trees at Kalapana, Hawaii. Winter wheat crops were grown with ostensibly adequate supplies of all soil nutrients in 1990 and 1991 with the aim of testing if late foliar supplements of K and N, applied at key development stages, could improve grain yield and grain N content. Increase in fruit calcium concentration Treatment (ppm) 8 foliar sprays (22 lbs calcium/acre) 45 5 foliar … In general, 100 to 400 pounds per acre have been adequate. Always start with a lower dosage and increase as needed. Either soil or foliar applications of sulfate or nitrate of potash should be made where potassium is low. Foliar potassium nitrate has been recommended in prune orchards as an interim corrective measure until soil applications take effect (22,25). Treatment Date: Oct. 31, 19li6 Control Potassium nitrate *Significant at P 0.05. o 17.1 * Table 2. Please Call For Product Orders, Pricing, and Availability. It is not recommended in most other fruit crops because of a lack of response (22,25,26). The soil and foliar applications of macro and micronutrients can potentially affect fruit quality and postharvest storage behaviour of guava. This input proved to be seriously counterproductive and yet tens of thousands of growers around the globe religiously foliar spray potassium nitrate throughout the second half of the season. Research in grapes has shown no effect on deficiencies or increases in foliar tissue potassium levels (10,19,23). INFO@FERTIZONA.COM The authors of the study concluded that “potassium nitrate may not be suitable for late season foliar nutrition” and they are most certainly correct. When the concentration of the potassium nitrate is reduced to 1000g per 100 litres, only 15g K is applied and this spray will not be able to increase the K status of the trees sufficiently. Potassium Nitrate (13-0-45) - 1 Kg Potassium Nitrate (13-0-45) 100% Water Soluble Fertiliser For Foliar Application and Fertigation Specification: Moisture percent by weight, maximum – 0.5 Total Nitrogen (All in Nitrate form) percent by weight, minimum – 13.0 Water Soluble Potash (as K2O) percent by weight, minimum – 45.0 Sodium (as Na) (On dry basis) cent by weight, minimum &n Dosage: 3 ml / litre of water through drip, drenching or foliar and 10 ml / litre of water for dipping Note: Our recommendation as per our trails. of 4000g potassium nitrate per 100 litre water, 60kg potassium nitrate or 22,5kg K will be applied. Gypsum was applied at approximately one ton per acre, annually. 520.836.7477 Email For General Information Requests. Foliar Feeding: Mix 5-15 ml per gallon of water: Spray at night when lights are off or not in direct sunlight. Caution: Do not undertake foliar spray, when crops are under drought or water stress condition Spray only in early morning or evening hours. spray, 5-spray, and 2-spray treatments applied a yearly total of 74, 40, and 18 pounds of technical-grade CaCl 2 per acre. percent potassium nitrate spray at Waimanalo, Hawaii. Treatment date: May 29, 1986. However, dosage and application will depend on soil analysis and crop growth stages. Derived from: urea, potassium nitrate, mono-potassium phosphate, magnesium chloride, boric acid, iron … This spray can therefore be successful. Among the primary nutrients, potassium plays a significant role in improving fruit quality in terms of increased SSC, ascorbic acid and lower acidity (Mitra and Bose, 1985; Kumar et al., 1996).

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