soil chemistry acidifying the soil or lowering the phacidifying the soil or lowering the ph...
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Soil ChemistrySoil Chemistry• Acidifying the soil or lowering the pHAcidifying the soil or lowering the pH
– Elemental sulfur (effect is temporary)Elemental sulfur (effect is temporary)
– Ammonium sulfate (effect is temporary)Ammonium sulfate (effect is temporary)– Aluminum sulfate is also used but not Aluminum sulfate is also used but not
recommended as aluminum is a heavy metal!recommended as aluminum is a heavy metal!
Soil ChemistrySoil Chemistry• Basic soils often can cause Basic soils often can cause iron chlorosisiron chlorosis in plants in plants
• This can be corrected by acidifying the soil This can be corrected by acidifying the soil or choosing a plant which is tolerant of or choosing a plant which is tolerant of alkaline soils!alkaline soils!
• Intervienal chlorosisIntervienal chlorosis: often on : often on acid-loving plants like roses, fruit trees,acid-loving plants like roses, fruit trees, azaleas and rhododendronsazaleas and rhododendrons
Blue in acidic soils <5.5Blue in acidic soils <5.5 with available aluminumwith available aluminum
Pink in neutral soils Pink in neutral soils near pH of 7near pH of 7
Soil FertilitySoil Fertility• 16 elements required for plant growth16 elements required for plant growth
• C HOPKNS CaFe Mg B Mn CuZn Mo ClC HOPKNS CaFe Mg B Mn CuZn Mo Cl
• ““C. Hopkins Café managed by mine cousins C. Hopkins Café managed by mine cousins Mo and Cleo”Mo and Cleo”
Soil FertilitySoil Fertility• C, H, O from the C, H, O from the atmosphere & wateratmosphere & water
• MacronutrientsMacronutrients: N, P, K most often : N, P, K most often deficient in soils. Also, S, Ca, Mgdeficient in soils. Also, S, Ca, Mg
• MicronutrientsMicronutrients: Fe, B, Mn, Cu, Zn, Mo, Cl: Fe, B, Mn, Cu, Zn, Mo, Cl
Soil FertilitySoil Fertility
Soil FertilitySoil Fertility
Soil FertilitySoil Fertility
Not fertility, excess light!Not fertility, excess light!
Soil FertilitySoil Fertility
Soil FertilitySoil Fertility
Soil FertilitySoil Fertility• Organic fertilizers Organic fertilizers
– The only choice up until the 1940’sThe only choice up until the 1940’s– ManureManure– FishmealFishmeal– SeaweedSeaweed– BloodmealBloodmeal– BonemealBonemeal– CottonmealCottonmeal– Sewage sludgeSewage sludge– These often contain micronutrientsThese often contain micronutrients
