•overview • soil characteristics • mineral nutritionguralnl/gural/mineral nutrition.pdf ·...
TRANSCRIPT
Mineral Nutrition• Overview• Soil Characteristics• Mineral Nutrition
Overview
• Function • Physical support • Inorganic nutrients • Water
Functions
Soil Characteristics
• Properties:• Air • water • mineral • organic • Horizons: O, A, B
Soil• Particles:• clay <.002 mm • silt .002-.02 mm • sand .02-2 mm • gravel > 2 mm • Loam: 20% clay, 50%
sand • Soil texture affects• Components: Organic
component, Inorganic
Soil component properties• Soil texture affects:• water retention • leaching of nutrients • availability of nutrient • Soil Properties• maximum retention capacity • field capacity • permanent wilting point • cation exchange capacity • H+>Ca>Mg>K=NH4>Na retention
on clay • anions leached due negative
charge of clay • Organic component• phenolics• pH
Mineral Nutrition
• Essential nutrients • Quantitative
requirements • Deficiency symptoms
Nutrients
• macronutrients • micronutrients • two properties of
essentiality • cannot complete life
cycle • forms part of
molecule/structure of plant that is essential
Quantitative requirements
• Deficiency • Adequate • Toxic • Law of diminishing
return
Nutrient Deficiency symptoms
• Function of element • Whether mobile in
plant • Old vs new leaves
show symptoms
Symptoms