OBJ Answers;!
Agric obj
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COMPLETE AGRICULTURAL SCIENCE .
You Are To Answer 5 Questions in All
1a.)
I) unpredictable
1. Droughts or prolong periods without rain results in poor yields
2. Flooding results in erosion
3. Inadequate sunshine also reduces photosynthetic ability of plants
ii) inadequate rural infrastructure
1. This results in urban drift ie massive exodus to big cities for better standard of living.
2. Results to massive reduction in agricultural work force in rural settings
3. Results in low agricultural production
iii) Diseases
1. Result in increase in agricultural cost of production
2. Reduce the quality of farm produce
3. Reduce farmers income
1bi)
1. Contour ditch
2. Border dyke
3. Furrow irrigation
4. Wild flooding
1bii)
1. High salt problems or salinity of soil which prevents proper growth of crops
2. Transmissions of diseases is possible
3. There is a build up and spread of pests
4. Pollution of the environment is possible
5. There is high cost of equipment
6. Vectors of diseases breed freely
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2ai)
Economic factors:
Most farmers are poor and cannot to bug machines such as tractors, plough,ridges, harrows,harvester.
2aii)
Technical know-how; most famers jack the required Knowledge and skills to operate sophisticated machines.
2aiii)
Small farm holdings; it is not economical for small scale farmers since it is very expensive to operate.
2b) Piercing and sucking crop pests;
These pests (mostly insects) have mouth parts that are modified and adapted for piercing and sucking plant tissues examples of them are aphid, moths,cotton ,stainer,cocoa thrip e.t.c
ii) Biting and chewing crop pests; These are mostly vertebrate and invertebrates pests that posses strong mouth parts for adapted to their mode of feeding examples are grasshoppers, crickets, termites, e.t.c
iii) Boring crop pests; These are insect pests whose mouth parts are adapted for boring holes and destroying tissues of seeds sem and fruits examples are weevils, stem borers and fruit fly and beetles
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3ai)
i)Long lactation periods
ii)Immunity and resistence from diseases
iii)Healthy variety
iv)Long life
3aii)
i)Camels
ii)Horses
3aiii)
i)It can perform more tedious jobs than man.
ii)It can handle many farm operations.
iii)It can be controlled or easy to operate.
iv)They are much stronger than man
3b) Symptoms of Bacterial blight of cottons
i)Angular Spots on leaves
i) Death of shoots and rotting bolls
Control measure of Bacterial blight of cottons
i) Remove and burn infected plants
ii) Grow resistant varieties
Symptoms of Cassava Mosaic
i) Distortion of leaves
ii) Leaf curl
Control measures of Cassava Mosaic
i) Spray with insecticides
ii) Uproot and burn infected plants
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4a)
i)Sunlight
ii)Temperature
iii)Rain
iv)Water or Humidity
v)Soil or water chemistry
vi) pollution
4b)
i)green plants make use of the food they manufacture to produce seed and fruits
ii)dead an decayed plants and animals provide food for the saprophytic organismm
iii)seed produced by plants is used to reproduce another plant
iv)animals make use of the carbonhydrate food produced by plants to get energy and fruit used as food
v)animals and plant produce carbonhydrate(Co2) during respiration to enrich the atmostphere with Co2
4c)
spacing 40cm*40cm
but 100cm=1m
40cm/100=0.4m
spacing=0.4m*0.4m
spacing=0.16m
4di)
i)Hemp
ii)Hoopvine
iii)Nettles
iv)Ramie
4dii)
i)Tea
ii)Mate
iii)Kola
iv)Kava kava.
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5ai) -Beak/Mouth
-Esophagus
-Crop
-Proventriculus
-Small Intestine
5aii) -Beak/Mouth: The Beak/Mouth contains glands that secrete saliva, which wets the feed to make it easier to swallow. Also, the saliva contains enzymes, such as amylase, that start the digestion process.
-Esophagus: The esophagus is a f
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