Recommended Orange Applications
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Recommended Applications
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Neither the timing of application nor the number of applications of nitrogen appears to matter as much as the consistency of applications from year to year. Most growers make a single application annually, usually two or three months prior to bloom. A few growers utilize split applications, with two-thirds of the rate applied pre-bloom and the balance in May. Growers who fertilize through the irrigation system or drip irrigation systems commonly make injections at least monthly through the year.
The total amount of nitrogen to be applied per season depends greatly upon the age of the trees. Trees aged 4-5 years should get 75 lbs. N/acre/year, 6-7 year old trees 100 lbs. N/acre/year, 8-9 year old trees 125 lbs. N/acre/year and groves over 10 years old a standard 150 lbs. N/year. These rates are based upon the use of soluble synthetic nitrogen fertilizers and, as such, use of a high nitrogen organic liquid such as Super Six would lower these rates by approximately 20 percent.
Super Six application rates to fertile organic soils should be 80-100 lbs. N/acre/season that translates to 140 to 175 gallons of Super Six/acre/season.
Sandy soil groves should get 100-120 lbs. N/acre/season that is 175 to 220 gallons Super Six/acre/year.
Winter-applied foliar sprays of 50 to 60 pounds per acre of low-biuret urea have increased navel orange production in California. Similar results have been reported for Valencia oranges in Florida. As such, we recommend the same with the use of Super Six if foliar applications are possible.