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N P K S S Ca Mg Fe Fe B Cl Cu Mn Mo Zn Essential Essential Turfgrass Turfgrass Nutrients Nutrients

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N. P K. S Ca Mg. Fe. B Cl Cu Mn Mo Zn. Essential Turfgrass Nutrients. Nitrogen. Organic Matter (O.M.) Fertilizers. Nitrogen Requirements. GrassLbs. N/1,000 ft 2 /Yr Common bermuda4 - 5 Hybrid bermuda5 - 6 - PowerPoint PPT Presentation

TRANSCRIPT

N

P K

SS

Ca Mg

FeFe

B Cl Cu Mn Mo Zn

Essential Essential Turfgrass Turfgrass NutrientsNutrients

NitrogenNitrogen Organic Matter Organic Matter

(O.M.)(O.M.)

FertilizersFertilizers

Nitrogen RequirementsNitrogen RequirementsGrassGrass Lbs. N/1,000 Lbs. N/1,000

ftft22/Yr/Yr

Common bermudaCommon bermuda 4 - 54 - 5Hybrid bermudaHybrid bermuda 5 - 65 - 6St. Augustine (Sun)St. Augustine (Sun) 3 - 43 - 4St. Augustine (Shade)St. Augustine (Shade) 2 - 32 - 3ZoysiaZoysia 2 - 32 - 3Tall FescueTall Fescue 3 - 43 - 4BuffalograssBuffalograss 1 - 21 - 2CentipedegrassCentipedegrass 1 - 21 - 2

Nitrogen SourcesNitrogen Sources

Soluble NitrogenSoluble Nitrogen

Slow Release NitrogenSlow Release Nitrogen

Organic NitrogenOrganic Nitrogen

Soluble Nitrogen Soluble Nitrogen SourcesSources

UreaUrea

Ammonium SulfateAmmonium Sulfate

Potassium NitratePotassium Nitrate

Ammonium NitrateAmmonium Nitrate

Slow ReleaseSlow ReleaseNitrogen SourcesNitrogen Sources

Urea — formaldehyde (UF)Urea — formaldehyde (UF)

Isobutylidene diurea (IBDU)Isobutylidene diurea (IBDU)

Sulfur coated urea (SCU)Sulfur coated urea (SCU)

Polymer coated nitrogenPolymer coated nitrogen

Organic FertilizerOrganic Fertilizer

A material containing carbon A material containing carbon and one or more elements other and one or more elements other than hydrogen and oxygen than hydrogen and oxygen essential for plant growthessential for plant growth

Example: Natural Based FertilizerExample: Natural Based FertilizerChuck’s GreeneryChuck’s Greenery 100% Natural Based Fertilizer100% Natural Based Fertilizer

14 - 2 - 414 - 2 - 4 81% Natural Organic 81% Natural Organic

7% Natural Inorganic (Mineral)7% Natural Inorganic (Mineral)

Per 100 lbs. by WeightPer 100 lbs. by Weight % of the Nutrients% of the Nutrients

12 lbs. Urea12 lbs. Urea 40% of the N40% of the N54 lbs. Feather Meal54 lbs. Feather Meal 50% of the N50% of the N

12 lbs. Blood Meal12 lbs. Blood Meal 10% of the N10% of the N

15 lbs. Bone Meal15 lbs. Bone Meal 100% of the P100% of the P22OO55

7 lbs. Sulfate of Potash7 lbs. Sulfate of Potash 100% of the K100% of the K22OO

Factors AffectingFactors AffectingNutrient AvailabilityNutrient Availability

Oxidation = reduction state of the nutrientOxidation = reduction state of the nutrient FE FE +2+2, Fe , Fe +3+3

Concentration of the nutrientConcentration of the nutrient Water content of soilWater content of soil OxygenOxygen TemperatureTemperature pHpH

NitrificationNitrificationNHNH44

++ + O + O22 NONO22--

NONO22 + O + O22 NONO33--

Concentration of the nutrientConcentration of the nutrient Water content of soilWater content of soil OxygenOxygen TemperatureTemperature pHpH

Nitrate (NO3-) is lostNitrate (NO3-) is lostfrom soil by:from soil by:

LeachingLeaching Soil microorganismsSoil microorganisms Taken up by grassTaken up by grass DenitrifiedDenitrified

DenitrificationDenitrificationNONO33

-- NONO22-- NN22OO NN22

Occurs under the following conditions:Occurs under the following conditions:

Low oxygen concentrationLow oxygen concentration High soil moistureHigh soil moisture Alkaline soilsAlkaline soils High temperaturesHigh temperatures

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