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WAEC GCE 2017 - AGRIC SCIENCE ESSAY AND OBJ ANSWERS

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WAEC GCE - AGRIC ANSWERS

Exam Time: Tuesday, 5th September, 2017
Agricultural Science 2 (Essay)
9.30am – 11.40am
Agricultural Science 1 (Objective)
11.40am – 12.30pm
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AGRIC OBJ:
1-10: DCBCBCDACA
11-20: BBABCCBCDB
21-30: ADDADDDABB
31-40: CDCDCCDABC
41-50: BCDBDBAACC
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(1a)
(i) unpredictable climate:
(a) Droughts or prolong periods without rain results in poor yields
(b) Flooding results in erosion 
(c) Inadequate sunshine also reduces photosynthetic ability of plants

(ii) Inadequate rural infrastructure:
(a) This results in urban drift ie massive exodus to big cities for better standard of living.
(b) Results to massive reduction in agricultural work force in rural settings
(c) Results in low agricultural production

(iii) Diseases:
(a) Result in increase in agricultural cost of production
(b) Reduce the quality of farm produce
(c) Reduce farmers income

(1bi)
(i) Contour ditch 
(ii) Border dyke 
(iii) Furrow irrigation 
(iv) Wild flooding

(1bii)
(i) High salt problems or salinity of soil which prevents proper growth of crops
(ii) Transmissions of diseases is possible
(iii) There is a build up and spread of pests
(iv) Pollution of the environment is possible
(v) There is high cost of equipment
(vi) 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) 
(i) 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

==================================


(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:
-Angular Spots on leaves
-Death of shoots and rotting bolls
Control measure of Bacterial blight of cottons:
-Remove and burn infected plants
-Grow resistant varieties
Symptoms of Cassava Mosaic:
-Distortion of leaves 
-Leaf curl 

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(4a)
ABIOTIC COMPONENT:
(i) light
(ii) temperature
(iii) water
(iv) atmosphere and wind
(v) topography
(vi) soil


(4b)
(i)it is the basis of soil fertilizer
(ii)it increases soil nutrients
(iii)it promotes the soil structure
(iv)it is both biological and physical health of the soil
(v) it is a buffer against harmful substances

(4c)
spacing 40cm*40cm
but 100cm=1m
40cm/100=0.4m
spacing=0.4m*0.4m
spacing=0.16m

(4di)
(i)Hemp
(ii)Nettles
(iii) Kenaf
(iv) Jute

(4dii)
(i) Cocoa
(ii) Tea
(iii) coffee
(iv) Kola

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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 flexible tube that connects the mouth with the rest of the digestive tract. It carries food from the mouth to the crop and from the crop to the proventriculus.

-Crop: The crop is an out-pocketing of the esophagus and is located just outside the body cavity in the neck region. Swallowed feed and water are stored in the crop until they are passed to the rest of the digestive tract.

-Proventriculus: The esophagus continues past the crop, connecting the crop to the proventriculus. The proventriculus (also known as the true stomach) is the glandular stomach where digestion primarily begins.

-Small Intestine:The small intestine is made up of the duodenum (also referred to as the duodenal loop) and the lower small intestine. The remainder of the digestion occurs in the duodenum, and the released nutrients are absorbed mainly in the lower small intestine

(5b)
(i) Lack of proper education of farmers 
(ii) Poverty does not allow people to join insurance 
(iii) The difficulty of paying farmers when they are due
(iv) Inattractiveness of insurance in west África 
(v) They seem to benefit only their stakeholders and not farmers

(5c) 
(i) They are very expensive to operate
(ii) They are only availiable to farmers who are Wealthy enough to own television and radio sets 
(iii) Farmers may find it difficult to ask questions on matters which they do not understand 
(iv) They are only useful to educated farmers;illiterate farmers can never benefit

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(6a) 
(i) Centro 
(ii) Mucana 
(iii) Stylo
(iv)Sun hemp

(6b)

(6c)
Debit
Purchases and expenses (le)
Opening valuation- 15,000.00
Cost of agrochemicals- 3,800.00
Hiring of labour- 9,000.00
Transportation - 1,500.00
Cost of processing farm produce - 2,500.00
Miscellaneous - 2,000.00
Total- 33,800.00
Net profit- 40,200.00
Grand total - 74,000.00

Credit
Sales and receipts (le)
Closing valuation - 15,000.00
Sales of crops - 57,700.00
Crops consumed - 1,300.00

Total - 74,000.00



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COMPLETED
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