Soil Nutrients

1
Soil Nutrients

• By

2
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.

3
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

4
Terms and Definitions

• Macronutrient Nutrient needed in larger
  quantities
• Toxicity A point that is reached where too much
  of a nutrient becomes poisonous

5
(No Transcript)
6
Primary and Secondary Nurtrients

• Nitrogen
• Phosphorus
• Potassium
• Calcium
• Magnesium
• Sulfur

7
Nitrogen Functions

• Gives plants the green coloring
• Makes up 1 to 4 of plants harvested material
• Induces vigorous, rapid growth in plants
• 98 of the planets nitrogen is in the primary
  rock of the Earth, the remaining 2 is in the
  atmosphere
• Most readily absorbed

8
Nitrogen Deficiency Symptoms

• Chlorosis Yellowing in color of leaves
• Plant growth is stunted

9
Phosphorus

• Stimulates root growth
• Important for plant cells genetic material and
  energy transfer with ATP
• 3rd most readily absorbed

10
Phosphorus Deficiency Symptoms

• Stunted Growth
• Purplish coloring of leaves

11
Potassium

• Production and translocation of carbohydrates
• Water intake and respiration
• Stiffens stalks and straws
• 2nd most readily absorbed

12
Potassium Deficiency Symptoms

• Shorter and weaker plants
• Bronzing or a browning of leaf color

13
Magnesium

• Vital for photosynthesis
• Chlorophyll or the green coloring of the plant
• Needed for protein synthesis

14
Magnesium Deficiency Symptoms

• Leaves curl along the margins
• Leaf parts show a whitish color

15
Calcium

• Gives plant strength
• Stimulates formation of nitrates
• Promotes root and leaf growth

16
Calcium Deficiency Symptoms

• Chlorosis beginning in the leaf edges and moving
  inward
• Terminal buds become distorted

17
Sulfur

• Stimulates seed production
• Necessary for nodule formation on legumes
• Affects protein and crop quality

18
Sulfur Deficiency Symptoms

• Similar symptoms to that of a nitrogen deficiency
• Stunted appearance

19
Micronutrients in Plants

• Iron
• Maganese
• Boron
• Molybdenum
• Copper
• Zinc
• Chlorine

20
References

• Laca, Andrew. Ag Lesson Plans in Power Point.
  Soil Furtility. 19 May 2001. Glen Rose FFA, Glen
  Rose., USA. 27 Feb 2005 lthttp//www.glenroseffa.or
  g/lesson20plans.htmgt
• Primal Seeds. 26 Oct 2002. 27 Feb 2005
  lthttp//www.primalseeds.org/nutrientsgt
• Nutrient Deficiency Symptoms on Agronomic Crops.
  12 June 2002. 27 Feb 2005 lthttp//www.nrs.mcgill.c
  a/whalen/nutrient/symptom.htmlgt