Soil Nutrients By:. Objectives Know the definition of deficiency, nutrient, toxicity, macronutrient,...
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Transcript of Soil Nutrients By:. Objectives Know the definition of deficiency, nutrient, toxicity, macronutrient,...
Objectives
• Know the definition of deficiency, nutrient, toxicity, macronutrient, micronutrient.
• Identify the plant deficiencies from pictures
• Evaluate a plant to identify the nutrient absorption rate.
Terms and Definitions
• Nutrient – Element necessary for plant growth and reproduction.
• Deficiency – Plant condition where an essential nutrient is not sufficiently available.
• Micronutrient – Nutrient needed in smaller quantities
Terms and Definitions
• Macronutrient – Nutrient needed in larger quantities
• Toxicity – A point that is reached where too much of a nutrient becomes poisonous
Nitrogen Functions
• Gives plants the green coloring
• Makes up 1% to 4% of plant’s harvested material
• Induces vigorous, rapid growth in plants
• 98% of the planet’s nitrogen is in the primary rock of the Earth, the remaining 2% is in the atmosphere
• Most readily absorbed
Phosphorus
• Stimulates root growth
• Important for plant cells genetic material and energy transfer with ATP
3rd most readily absorbed
Potassium
• Production and translocation of carbohydrates
• Water intake and respiration
• Stiffens stalks and straws
• 2nd most readily absorbed
Magnesium
• Vital for photosynthesis
• Chlorophyll or the green coloring of the plant
• Needed for protein synthesis
Calcium Deficiency Symptoms
• Chlorosis beginning in the leaf edges and moving inward
• Terminal buds become distorted
Sulfur
• Stimulates seed production
• Necessary for nodule formation on legumes
• Affects protein and crop quality
References
Laca, Andrew. “Ag Lesson Plans in Power Point”. Soil Furtility. 19 May 2001. Glen Rose FFA, Glen Rose., USA. 27 Feb 2005 <http://www.glenroseffa.org/lesson%20plans.htm>
Primal Seeds. 26 Oct 2002. 27 Feb 2005 <http://www.primalseeds.org/nutrients>
Nutrient Deficiency Symptoms on Agronomic Crops. 12 June 2002. 27 Feb 2005 <http://www.nrs.mcgill.ca/whalen/nutrient/symptom.html>