NECO 2019 - AGRIC ANSWER

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AGRIC OBJ
1-10: DBBBEDBEDD
11-20: DDBAACDADD
21-30: EECAAABBDB
31-40: CECECDCCAC
41-50: AADCADAADE
51-60: CDEAEDADEB
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ANSWERS:


(4ai)
Magnesium:
(i)Magnesium is used by plants for the metabolism of carbohydrates
(ii) It is used in plant's cell membrane stabilization.

(4aii)
Manganese:
(i) It is used for nitrogen metabolism in plants
(ii) For synthesis of some enzymes in plants

(4aiii)
Molybdenum:
(i) It is used to synthesize amino acids within the plant.(ii) It is also needed by symbiotic nitrogen fixing bacteria in legumes to fix atmospheric nitrogen.

(4b)
(i)Less water is lost in the process and there is no run-off.
(ii)Subsurface irrigation systems can free up aboveground space.
(iii)Crops grown in these conditions may grow more uniformly.
(iv)With less water remaining on the leaves, there is a lowered risk of excessive moisture damage.

(4ci)
-Overgrazing-
(i)Leads to erosion
(ii)Loss of soil nutrients

(4cii)
Clean Clearing:
(i)Leads to erosion
(ii)Reduction of micro organisms activities

(4ciii)
Bush Burning:
(i)It kills soil micro organisms
(ii)Leads to loss of soil nutrients.


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(5ai)
Hybridization is the process of crossing two genetically different individuals to result in a third individual with a different, often preferred, set of traits.

(5aii)
Homozygous are individual organisms carrying two identical alleles (for example RR or rr) while heterozygous are individual organisms that bear different alleles (for example Rr).

(5b)
(i) Increases the cost of production due to the cost of controlling the diseases
(ii) Reduction in farmer's income
(iii) Reduction of quality of crop
(iv) Increase in prices for consumers.
(v) Destruction of seed viability
(vi) It causes instability in food supply.

(5c)
(i)Good soil preparation.
(ii)Use of indigenous varieties.
(iii)Pest control through the use of mesh screen (nylon nets)
(iv)Roguing or Pruning
(v)Intercropping with aromatic herbs
(vi)Crop rotation and Multiple cropping

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(8a)
[PICK ANY FOUR]
(i) Sanitation
(ii) Debeaking
(iii) Housing
(iv) Vaccination
(v) Feeding
(vi) Hatching
(vii) Incubation
(viii) Brooding
(ix) Candling
(x) Watering

(8bi)
Rinderpest:
(i) Quarantine and slaughter.
(ii) vaccination

(8bii)
Aspergillosis:
(i)Good hatchery sanitation
(ii) Avoidance of mouldy feed

(8biii)
Anthrax:
(i) Cut off infection source.
(ii) Dispose of anthrax carcasses correctly

(8biv)
Coccidiosis:
(i) Vaccination
(ii) Isolation of suspected animals

(8c)
(i) Poor growth
(ii) High competition for survival
(ii) It could lead to death of animal
(iv) It can lead to cannibalism

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(10ai)
The law of diminishing returns states that in a production process, as on input variable is increased, there will be a point at which the marginal per unit will start to decrease holding all other factors constant.

(10aii)
(i) Prices of rice
(iii) Income of the consumers
(iv) Expectation of change in the price in future
(iii) Taste of consumers
(iv) Availability close substitute

(10bi)
Total depreciation = Cost price - Selling price

Given that the cost of rice = N108,000
Selling price = N93,000

Total depreciation = 108,000 - 93,000 = N15,000

(10bii)
Annual depreciation = Total depreciation/ Life span

Total depreciation = N15,000
Life span = 2017-2007
Life span = 10years

Annual depreciation = 15,000/10 = N1,500

(10ci)
(i) It will afecct the enforcement of agricultural policies by government
(ii) It brings about low productivity

(10cii)
(i) Private producers
(ii) Cooperative groups
(iii) Subsistence producers
(iv) Support organizations




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