sap analysis - university of florida
TRANSCRIPT
SAP ANALYSIS:It’s All About The Inventory
Presenter: Jeff Glass
Business Development Manager
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Agro-K has been working with sap
analysis since 2016 – during the last 30
months I have analyzed over 200 sap
samples in Florida, most of which have
been with citrus.
Today’s topics:
• A well-balanced citrus grove
• Sap vs Tissue – tomato example
• Long term grove sap analysis
• A recent comparison with Zn & Mn
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Nutrient Demands Are Not A Flat Line
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GGGGGGGGGGGGGGGLooks great on paper, but what about the grove?
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A well-balanced grove is the ultimate
goal. Citrus trees must have a stocked
warehouse (soil), the proper equipment
(leaf tissue), and sufficient inventory
(sap) to maintain nutritional balance.
The Results Support the Sap Report:
• Solid flushes, large leaves
• Great color
• Nice fruit set & retention
Tissue Test vs.
Sap Analysis
Tomato:
During Bloom
Ca K Mn
Tissue Sap: Young Leaves Sap: Old Leaves
Excessive
Optimum
Deficient
December 6, 2018
1 pint/A for
3 weeks1 pint/A for
3 weeks
Ca K Mn
Tissue Sap: Young Leaves Sap: Old Leaves
Tissue Test vs.
Sap Analysis
Tomato:
After Ca & Mn
Applications
Excessive
Optimum
Deficient
January 31, 2019
Long Term
Citrus
Evaluation:
Grower
Standard vs.
Sap Managed
• Two 100+ acre Valencia blocks
• No micro-irrigation
• One grower standard block
• One sap managed block
• Only differences are foliar nutritional apps
• Project began in December of 2018
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Dec '18 Jan '19 Mar '19 Apr '19 May '19 Jun '19 Jul '19 Aug '19 Oct '19 Dec '19 Jan '20 Mar '20
POTASSIUM PPM
Grower Standard Young Leaves Grower Standard Old Leaves
Sap Managed Young Leaves Sap Managed Old Leaves
Sap Analysis: Potassium Levels in Young and Old ‘Valencia’ LeavesFlorida: December 2018 - March 2020
Dotted Line = Grower StandardSolid Line = Sap Managed
Sap Managed = +95 lb solids/Acre
Sap Analysis: Calcium Levels in Young and Old ‘Valencia’ LeavesFlorida: December 2018 - March 2020
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Dec '18 Jan '19 Mar '19 Apr '19 May '19 Jun '19 Jul '19 Aug '19 Oct '19 Dec '19 Jan '20 Mar '20
CALCIUM PPM
Grower Standard Young Leaves Grower Standard Old Leaves
Sap Managed Young Leaves Sap Managed Old Leaves
Dotted Line = Grower Standard
Solid Line = Sap Managed
Sap Managed = +95 lb solids/Acre
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Dec '18 Jan '19 Mar '19 Apr '19 May '19 Jun '19 Jul '19 Aug '19 Oct '19 Dec '19 Jan '20 Mar '20
SODIUM PPM
Grower Standard Young Leaves Grower Standard Old LeavesSap Managed Young Leaves Sap Managed Old Leaves
Sap Analysis: Sodium Levels in Young and Old ‘Valencia’ LeavesFlorida: December 2018 - March 2020
Dotted Line = Grower Standard
Solid Line = Sap Managed
Sap Managed = +95 lb solids/Acre
Sap Analysis: Nitrogen Levels in Young and Old ‘Valencia’ LeavesFlorida: December 2018 - March 2020
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Dec '18 Jan '19 Mar '19 Apr '19 May '19 Jun '19 July '19 Aug '19 Oct '19 Dec '19 Jan '20 Mar '20
NITROGEN PPM
Grower Standard Young Leaves Grower Standard Old Leaves
Sap Managed Young Leaves Sap Managed Old Leaves
Dotted Line = Grower Standard
Solid Line = Sap Managed
Sap Managed = +95 lb solids/Acre
Sap Analysis: Molybdenum Levels in Young and Old ‘Valencia’ LeavesFlorida: December 2018 - March 2020
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Dec '18 Jan '19 Mar '19 Apr '19 May '19 Jun '19 Jul '19 Aug '19 Oct '19 Dec '19 Jan '20 Mar '20
MOLYBDENUM PPM
Grower Standard Young Leaves Grower Standard Old LeavesSap Managed Young Leaves Sap Managed Old Leaves
Dotted Line = Grower Standard
Solid Line = Sap Managed
Sap Managed = +95 lb solids/Acre
2021 Sap Managed Block: Applications of Zn and Mn
Two Valencia blocks – grower standard and Sap managed
• Before and after sap analysis (January & March)
• 1 quart of Zn phosphite per acre
• 1 quart of Mn phosphite per acre
• Focus – Zn, Mn, K and Ca
Note: Optimum ranges are modified based on research and data
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+15%
+29%
Grower Standard Block
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+355%
+586%
Sap Managed Block
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-2%
+9%
Grower Standard Block
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+373%+334%
Sap Managed Block
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-21%
-13%
Grower Standard Block
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-58% -64%
Sap Managed Block
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+3%
-18%
Grower Standard Block
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+55%
+64%
Sap Managed Block
Sap Analysis: The Key To Inventory Balance
Real-time analysis
of inventory; have
the ability to make
adjustments
Sap analysis reports
the inventory status
of 21+ plant
nutrition indicators
Balance plant
nutrient inventories
to maximize yield &
bottom line
“The Science-Driven
Approach to Plant
Nutrition”