supplying nutrients to floriculture crops interest approach what do vitamins do for you? what do you...
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Supplying Nutrients toFloriculture Crops
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Interest Approach
• What do vitamins do for you?
• What do you feel like when your sick?
• What are essential elements in fertilizer?
• What do they do for the plant?
• What does a plant look like when it’s deficient in this nutrient?
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Interest Approach
– Vitamins:
• C – health
• D – strength
• A – eyesight
• Calcium-bones
• Iron-blood
– Elements
• N – growth
• P – blossoms
• Ca – cell strength
• K - roots
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Student ObjectivesAfter this lesson you CAN
1. Name the nutrients needed for plant growth.
2. Describe pH and how it is modified.
3. Describe the components of a fertilizer.
4. Explain the methods of applying fertilizers to floriculture crops.
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Macronutrients - elements that are needed by the plant in the largest amount.
• Primary macros• nitrogen (N)• phosphorus (P)• potassium (K)
• Secondary macros• calcium (Ca)• magnesium (Mg)• sulfur (S).
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Micronutrients -Needed in Smaller Amounts by the Plants, but Are Still
Essential
• Boron (B)
• Copper(Cu)
• Chlorine (Cl)
• Iron (Fe)
• Manganese (Mn)
• Molybdenum (Mo)
• Zinc (Zn)
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Soil Tests
• can be performed on the soil to determine which nutrients are present or deficient (absent or lacking).
• Are only as accurate as the test – you get what you pay for
• Can confirm nutrient deficiency shown by plant leaves.
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Chlorosis
Generally begins in older leaves
Symptoms include poor plant growth, and leaves that are pale green or yellow because they are unable to make sufficient chlorophyll.
Nitrogen
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Undersides of tomato plant leaves, and the veins and stems, may turn purple
often overlooked or misdiagnosed as a nitrogen deficiency
weak thin stalks
may cause the plant to stop producing blooms
Phosphorous
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brown scorching and curling of leaf tips as well as chlorosis(yellowing) between leaf veins
Purple spots may also appear on the leaf undersides
Potassium
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Fertilizer
• Material provided to supply nutrients needed for plant growth. – 2 types of fertilizer
• Complete – contains the 3 Primary Macros• Incomplete – missing 1 or more Primaries• Fertilizer analysis states the percentage of
primary nutrients.
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16 – 4 – 8
• 16 % N
• 4 % P2O5
• 8 % K2O
• Equals 28%??? Where is the rest?!?
• Salts and other fillers make up the remaining 72%
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Fertilizer
• Available in three phases– Liquid, solid, gas (rarely used in floriculture)
• Applied by several methods• Premixed into soil.• Sprayed onto foliage.• Injected into irrigation water.• Slow release – dissolves over extended
period of time.
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Organic vs. Inorganic
• First off, what does this mean??– Organic is naturally occurring– Inorganic is man made or produced
– CLIP
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What are the nutrients needed for plant growth?
• Name the 3 primary macronutrients.• NPK• Name the 3 secondary macronutrients.• Ca• S• Mg• The micronutrients?• Fe., Cu B, Zn, Cl, Mo, MN
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What is pH and how is it modified?
• Define pH.
• Measure of acidity / alkalinity– potential of Hydrogen
• Add limestone to _________ pH?
• Add sulfur to ___________pH?
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What are the components of a fertilizer?
• Incomplete vs. complete?
• Complete has the 3 primary macros
• Incomplete is missing some primaries
• What is fertilizer analysis?
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How are fertilizers applied to floriculture crops?
• List the 3 phases of fertilizers.
• Liquid, solid, gas
• List the application methods.
• Irrigation injection
• Slow release
• Premix into soil
• Spray onto foliage