A measure of plantavailable nutrients in the soil

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A measure of plant-available nutrients in the
soil

• There are 17 essential elements for plants
• Three from the atmosphere
• Thirteen from the soil
• Primary - 3
• Secondary - 3
• Micronutrient - 8

Also. Macronutrients - 9 Micronutrients - 8
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Essential Nutrients

• Atmosphere
• Carbon CO2
• Hydrogen H2O
• Oxygen O2
• Soil-Primary
• Nitrogen NH4, NO3-
• Phosphorus PO4-3
• Potassium K
• Soil-Secondary
• Calcium Ca2
• Magnesium Mg2
• Sulfur SO4-2

• Soil-Micronutrient
• Iron Fe2
• Copper Cu2
• Zinc Zn2
• Manganese Mn2
• Boron BO4-2
• Molybdenum MoO4-
• Chloride Cl-
• Nickel Ni2

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Nutrient Primary Function

• Nitrogen
• Chlorophyll production
• Building amino acids
• Phosphorus
• Energy transfer
• ADP to ATP
• Potassium
• Enzyme activity
• Ionic balance in plant
• Water regulation

Mobility in plant?
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How Nutrients Move to Roots

• Mass Flow
• Nitrogen, Sulfur
• Diffusion
• Phosphorus, Potassium
• Root Interception
• All

Ca2, Mg2
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