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Under: ONDO STATE JOINT EXAM AGRIC SOLUTION
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(4ai)
A forest is an area of land dominated by trees.
(4aii)
- Equatorial Moist Evergreen or Rainforest
- Tropical Deciduous Forest
- Mediterranean Forests
- Temperate Broad-leaved Deciduous and Mixed Forest
- Warm Temperate Broad-leaved Deciduous Forest
- Coniferous Forest
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(5a)
Soil fertility refers to the ability of soil to sustain agricultural plant growth, i.e. to provide plant habitat and result in sustained and consistent yields of high quality
(5b)
i) Leaching – Plant nutrients are lost beyond the reach of plant roots.
ii) Soil erosion – Top soil is lost by the agent of erosion e.g. wind, water.
iii)Monocropping – This utilizes only specific nutrients from a particular zone making it exhausted.
-It also causes accumulation of certain pests and diseases.
Continuous cropping –This continuously exhaust the fertility of land unless the the land if fallowed.
iv)Change of soil PH -Use of either acidic or basic fertilizers affect soil pH and Consequently the
presence of micro-organisms hence soil fertility affected.
vi)Burning of vegetations –Destroys organic matter and soil structure. Nutrients are lost and soil
exposed to erosion.
vii)Accumulation of salts – Common in waterlogged areas and semi-arid areas in which poor drainage
causes evaporation during the dry periods, making the soil saline hence accumulating a lot of
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6A)
Nutrition is defined as the processes by which an animal or plant takes in and utilises food substances. Essential nutrients include protein, carbohydrate, fat, vitamins, minerals and electrolytes.
6B)
