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INTRODUCTION TO SOIL SCIENCE
| Institution | COLLEGE |
| Course | Diploma in Agribusin... |
| Year | 1st Year |
| Semester | Unknown |
| Posted By | stephen oyake rabilo |
| File Type | |
| Pages | 31 Pages |
| File Size | 883.69 KB |
| Views | 3494 |
| Downloads | 0 |
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Description
SOIL is a naturally occurring unconsolidated material on the earth surface that has been influenced by parent material, climate, organisms and relief, all acting over a period of time to produce a soil that may differ from the material from which it was derived from in terms of physical, chemical, mineralogical, biological and morphological properties.
Soil is composed of particles of broken rock that have been altered by chemical and mechanical processes that include weathering, erosion and precipitation. Soil is altered from its parent rock due to interactions between the lithosphere, hydrosphere, atmosphere, and the biosphere
Soil therefore is a dynamic and complex media developing under the influence of external factors i.e hydrosphere (water), atmosphere (air) and biosphere (flora and fauna).
Soil science. Is the study of properties and reactions of soils and materials, its relationship with man and how it can be used in the benefit of man.
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Polyurethanes are prepared from diisocyanates
and diols. Urethane (also called a carbamate) is a
functional group that contains both an ester and an
amide at a single carbonyl group.
Nucleophilic Addition Reaction: Example 1:
Sevin is a highly effective, biodegradable insecticide. It
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access to the neurotransmitter acetylcholine.
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BIOCHEMISTRY
PETROLEUM CHEMISTRY
Carbon is so Important in the Life Cycle. It has
numerous ways of bonding with many other
elements, particularly oxygen and hydrogen.
It can form both “organic” and “inorganic”
compounds. Organic compounds are considered
unstable in the biosphere because they are in the
reduced state.
Whereas Inorganic compounds, principally
calcite (CaCO3
) and dolomite (CaMg(CO3
)2
), are
stable because they are in the oxidized state.
Carbon is present in most substances that are
vital for the development of life (called
“biomolecules”): Proteins, lipids, sacharides, etc
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BIOCHEMISTRY
Alkyl halides are organic molecules containing a halogen
atom bonded to an sp3 hybridized carbon atom.
• Alkyl halides are classified as primary (1°), secondary (2°),
or tertiary (3°), depending on the number of carbons bonded
to the carbon with the halogen atom.
• The halogen atom in halides is often denoted by the symbol
“X”.
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BIOCHEMISTRY
Natural Gas
Natural gas is a gaseous fossil fuel consisting
primarily of methane but including significant
quantities of ethane, butane, propane, carbon
dioxide, nitrogen, helium and hydrogen sulfide.
Obtained from oil fields and natural gas fields,
and in coal beds.
Methane-rich gases are produced by the
anaerobic decay of non-fossil organic material, ie
biogas.
Total world production of natural gas in 1986
was 100 trillion m3
.
It is used as feed stock as well as fuel. It is
preferred due to its high Calorific Value
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