This document discusses various topics related to soil organic matter, nutrients, and micronutrients. It provides definitions and outlines the composition, significance, and effects of soil organic matter. It also defines nutrients and micronutrients, describes the different types and groups of nutrients, and explains their roles and importance for plants and humans. Additionally, it outlines the effects of pesticide pollution on water, soil, and air.
1 of 36
Download to read offline
More Related Content
Soil organic matter, Nutrients and Micronutrients, Pesticides effects
2. Soil organic matter (SOM)
Outline
definition
Composition of soil OM
What does organic matter do in soil
Significance of organic matter
Effect on environment
3. Soil
Outermost solid
layer of the earth
Collection of
natural bodies
Made up of
organic materials
That support the
growth of plants
Different from
substrate
7. What does organic matter do in soil?
OM is most important component of soil
OM serve as
reservoir of nutrients
water in soil
Help in reducing compaction
Reduce surface crusting
Increases water infiltration into the soil
8. Benefits of OM
Improve the soils ability to take up and hold
water
Improve the soil structure
work like a sponge that absorb up to 90
percent water
release most of the water that is absorbs to
water
Release nutrients in soil that increases its
fertality
11. Nutrients
Outlines:
Define term nutrients
Tell what are nutrients?
State balanced diet
Types of nutrients
Group nutrients
12. Nutrients
chemical
substance found in
food
Which help the
body work
Maintain the body
balance
Provide
nourishment for
growth
We need 50
nutrients overall
That divided into
six groups
13. Why you need nutrients?
Your body need nutrients to
Fuel your body
Help you to grow
Repair yourself
Maintain basic bodily functions
Such as metabolism, growth and sexcual
functions etc.
16. Role Of 6 Major Nutrients
Water (remove waste nutrients and regulate body
temperature)
Protein (build new tissues, antibodies, enzymes and
hormones etc)
Carbohydrate (provide energy)
Fat (provide long term energy, insulation and
protection)
Vitamins (facilitate use of other nutrients, regulate
growth and manufacturing hormones)
Minerals (build bones and teeth, help in muscle
functioning and nervous system activity)
18. Macronutrients
And
Micronutrients
Macronutrients
1) Nutrients that required in
large amount
2) E.g Protein, fiber, water
and carbohydrates
3) Cereals, legumes, meat,
fish, yams, potatoes, nuts,
oil and seeds are rich in
macronutrients
4) Provide bulk energy
needed for metabolic
system
Micronutrients
1. Nutrients that require in
small amount
2. E.g photo chemicals,
antioxidants, vitamins and
certain minerals
3. Vegetables, fruits, eggs,
green, leafy vegetables
etc. are rich in
micronutrients
4. Help various functions of
the body, growth and
prevent diseases
20. Definition
Essential elements required by organisms
In varying quantity
To orchestrate a range of physiological
functions
And maintain health
Their requirement differ between organisms
E.g humans and other organisms require
numerous vitamins and dietary minerals
But plants require specific nutrients.
21. Role of micronutrients
Micronutrients play a central role in
metabolism and in maintenance of tissue
functions
Vitamins and minerals are basic
micronutrients
23. Essential nutrients
for plants
7 nutrients essential for plant growth and health
Needed in small quantity but very necessary
Boron (regulate metabolism, transport
carbohydrate )
Chlorine (necessary for osmosis, photosynthesis)
Copper (work like enzymes)
Iron (essential for chlorophyll synthesis)
Manganesa (activate enzymes)
Molybdenum (essential for plant health)
Zinc (activate enzyme, chlorophll formation)
24. Essential nutrients
for humans
Minerals and vitamins
Require through out the life
But in small quantity
Nutrients (chromium, cobalt, copper, iodine,
iron, manganesa, molybdenum, selenium,
zinc)
Vitamins (vitamin B complex B1, B2, B3, B5,
B6, B7, B9,B12, A, C, D, K)
27. TYPE OF VITAMINS
Water soluble (vitamin B group)
__ Dissolve easily in water
__ and excreted from the body
Fat soluble (A, D, E and K)
__ absorbed through the intestinal tract
__ with the help of lipids (fats)
28. Function
of vitamins
Acts as hormones
Act as antioxidant
Act as mediators
Regulate cells and tissues growth
Act as enzyme cofactor
Act as a catalysts
29. Function
of minerals
Ca __ play role in formation of bones
Mg__ act as cofactor of enzyme
Fe__ transportation of oxygen
K__ regulate heart beat
Zn__ boost body immunity and heal wounds
Cl __ produce acid in stomach
I __ produce thyroid hormones
P __ synthesis DNA and bones
Na __ balance pH
Cu __ metabolize iron and enzymes
Se __ functioning antioxidant enzymes
30. Pesticides effects
Outlines
What are pesticides?
Water pollution by pesticides
Soil pollution by pesticides
Air pollution by pesticides
Resistance development