soilnutrients.ppt Plants need food in correct amounts Get C, H, O from air and water How to plants obtain nutrients

Plants need food in correct amounts
Get C, H, O from air and water
How to plants obtain nutrients

1. Essential Plant NutrientsEssential Plant Nutrients
2001 AgriTeach.com2001 AgriTeach.com
TMTM
(12901ms (12901ms)

2. What are “essential plant What are “essential plant
nutrients?”nutrients?”
•Plants need food in correct amountsPlants need food in correct amounts
•Get C, H, O from air and waterGet C, H, O from air and water
•How to plants obtain nutrients?How to plants obtain nutrients?
–Through openings in leaves and stemsThrough openings in leaves and stems
–From soil solution (roots)From soil solution (roots)
–From ions on soil particles (roots)From ions on soil particles (roots)
–From decomposable minerals (roots)From decomposable minerals (roots)

3. Where do nutrients come from?Where do nutrients come from?
•Soil Organic matter -- holds most nutrientsSoil Organic matter -- holds most nutrients
•Nutrients taken from the soil must be replacedNutrients taken from the soil must be replaced
•FertilizerFertilizer
–ManureManure
–LimeLime
–Commercial FertilizerCommercial Fertilizer
–Others: Others:
•anhydrous ammonia anhydrous ammonia
•whey whey
•paper pulppaper pulp
•sludgesludge
•biosolidsbiosolids

4. What is Nitrogen?What is Nitrogen?
•Nitrogen is in the air, but can’t be usedNitrogen is in the air, but can’t be used
•Absorbed as ammonium (NHAbsorbed as ammonium (NH
44) ions or nitrate ) ions or nitrate
(NO(NO
33) ions) ions
•Bacteria change ammonium into nitrateBacteria change ammonium into nitrate
•What does Nitrogen do?What does Nitrogen do?
–Increases protein content of some feed cropsIncreases protein content of some feed crops
–Gives dark green color Gives dark green color
–Increases stem and leaf growthIncreases stem and leaf growth

5. What is Phosphorus?What is Phosphorus?
•Not very abundantNot very abundant
–1 tenth of 1 percent of earth’s surface1 tenth of 1 percent of earth’s surface
•Needed for cell divisionNeeded for cell division
•What does Phosphorus do?What does Phosphorus do?
–Stimulates root formation and growthStimulates root formation and growth
–Hastens MaturityHastens Maturity
–Aids in seed formationAids in seed formation
–Makes plants more winter hardyMakes plants more winter hardy
–Helps legumes compete with grassesHelps legumes compete with grasses
•Helps form “nodules” on roots of legumesHelps form “nodules” on roots of legumes

6. Potassium, who needs it?Potassium, who needs it?
•In pure form, is quite nastyIn pure form, is quite nasty
•Usually combined with another elementUsually combined with another element
•What does potassium do?What does potassium do?
–Plants are more vigorousPlants are more vigorous
–Stiffer stemsStiffer stems
–Grain is plumperGrain is plumper
–More winter hardyMore winter hardy

7. Calcium… It does a plant good.Calcium… It does a plant good.
•Very variable amountsVery variable amounts
•Part of cell walls of plants -- bouncerPart of cell walls of plants -- bouncer
•What does calcium do?What does calcium do?
–Promotes early root growthPromotes early root growth
–Greater plant vigorGreater plant vigor
–Grain and seed productionGrain and seed production
–Encourages nodule formationEncourages nodule formation

8. MagnesiumMagnesium
•Must have magnesium to have Must have magnesium to have
photosynthesisphotosynthesis
•One atom in each molecule of chlorophyllOne atom in each molecule of chlorophyll
•What does Magnesium do?What does Magnesium do?
–Dark green color of leavesDark green color of leaves
–Regulates uptake of other nutrientsRegulates uptake of other nutrients
–Promotes formation of oils and fatsPromotes formation of oils and fats

9. Sulfur (stinky stuff!)Sulfur (stinky stuff!)
•Many plant proteins contain sulfurMany plant proteins contain sulfur
•Cabbage, legumes, onions are high in Cabbage, legumes, onions are high in
sulfursulfur
•What does Sulfur do?What does Sulfur do?
–Greater root growthGreater root growth
–Maintains dark colorMaintains dark color
–Nodule formationNodule formation
–Seed productionSeed production

10. Plant NutrientsPlant Nutrients
•Primary NutrientsPrimary Nutrients
–(N) Nitrogen(N) Nitrogen
–(P) Phosphorus(P) Phosphorus
–(K) Potassium - potash(K) Potassium - potash
•Secondary NutrientsSecondary Nutrients
–Magnesium Magnesium
–CalciumCalcium
–SulfurSulfur
•Trace ElementsTrace Elements
–ManganeseManganese
–ChlorineChlorine
–ZincZinc
–IronIron
–CopperCopper
–MolybdenumMolybdenum
–BoronBoron

11. Primary
Nutrients
Secondary
Nutrients
Trace
Elements
Plant NutrientsPlant Nutrients
Plant
Life