Waec Agric Science Questions and Answers 2021/2022 | Essay & OBJ

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“”WAEC 2021 AGRIC SCIENCE ANSWERS””
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Agriculture-Obj:

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11-20: DAABBBDDBC

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31-40: DDDCABDDCD

41-50: CDCDBABBBC

 

ANSWER 5 QUESTIONS IN ALL

(1ai)
(i) Granting farmers loan
(ii) Establishment of agencies like Nigeria Agriculture and Co-operative Bank(N.A.C.B)

(1aii)
(i) Establishment of adult education for farmers
(ii) Sensitizing farmers on importance of being educated

(1aiii)
(i)Employment of extension officer to sensitize farmers
(ii) Funding of extension programmes

(1aiv)
(i)Government should make policies that will favour farmers and discourage foreign counterparts
(ii) Government should create a good marketing channels for distribution of farm produce.

(1b)
TABULATE

= Disc plough
(i) does not have numerous small disc
(ii) has no scrappers
(iii) no drawbar

= Disc Harrow
(i) consist of numerous small disc
(ii) has scrappers
(iii) has drawbar

(1c)
(i) It destroy soil structure
(ii) It may results in erosion
(iii) It causes compaction due to its heavy weight
(iv) It affect the fertility of the soil
====================================

(2a)
(i) TIME
(i) It determines whether or not the soil is well developed
(ii) It takes shorter time in the formation of immature soil
(iii) It also takes a long time for plant to decay and become part of the soil

(ii) RAINFALL
(i) It provides water for hydrolysis
(ii) It helps to break down some parent rocks to form soil
(iii) It enhances vegetative growth of plants whose roots cause further breakdown

(iii) PARENT MATERIAL
(i) They constitute major materials from which soil is formed
(ii) It determines the chemical composition of the soil formed
(iii) It’s hardness affects the rate of soil formation

(2b)
(i) Non-uniform of crops
(ii) Most exhaustive crops should be followed by less exhaustive e
(iii) Deep rooted crops should be succeeded by shallow rooted crops
(iv) Leguminous crops should be grown after non-leguminous crops

(2c)
(i) It serves as cover crops
(ii) It serves as food for livestock
(iii) It is used as green manure
(iv) It helps to prevent erosion
(v) It is used for roofing farmstead
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(3ai)
Selective exploration is the process of cutting or harvesting only matured trees in a forest. It is a way of concentrating certain selected species of timber in a forest reserve. The system allows for the harvesting of older trees while the younger ones remain as cover to the surface of the forest.

(3aii)
(i) It ensures the concentration of selected species of timber in a forest.
(ii) It protects the soil from erosion.
(iii) It ensures the continuous supply of timber.
(iv) It prevents indiscriminate felling of timber by giving licenses to saw millers by state forestry division.

(3b)
Field pest of crops can be described as an organism which causes damage to crops when still n the feld WHILE storage pest of crops are organisms that damages or destroys stored crops.

(3ci)
(i) beetle
(ii) moths
(iii) rodents

(3cii)
(i) locusts
(ii) caterpillar insect
(iii) grasshopper

(3d)
(i) By mulching
(ii) By rotational grazing
(iii) By planting of cover crops
(iv) Use of drought tolerant crops

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

(4ai)
PRUNING OF COCOA TREES:
(i) It optimizes the balance of vegetative and reproductive growth
(ii) It increases the efficacy of fertilization and pest control
(iii) It helps in prevention and treatment of disease.
(iv) It reduces risk of failure from dead or weak branches

(4aii)
PARBOILING OF PADDY RICE:
(i) To increase the total and head yield of the paddy
(ii) To prevent the loss of nutrients during milling
(iii) To salvage wet or damaged paddy
(iv) To prepare the rice according to the requirements of consumers

(4b)
(i) By use of chemicals such as herbicides
(ii) By weeding
(iii) By cultural practices
(iv) By use of good tillage operation
(vi) Use of resistance varieties

(4c)
(i) They are used to enhance the beauty of a garden or home.
(ii) They are grown for food. Some chilies are grown as ornamental plants. An example is capsicums.
(iii) Some ornamentals can be used for medicinal purposes.Example of ornamental herbs are rosemary, mexican marigold and lemon grass.
(iv) They absorb carbon dioxide from the air and output oxygen thereby creating cleaner air.
(v) Fallen leaves of ornamental plants makes good mulch and compost.
============================

(5a)
TABULATE

=FEED A=
-Feed Conversion Ratio (FCR)-
(i) 6

=FEED B=
-Feed Conversion Ratio (FCR)-
(ii) 5

= FEED C=
-Feed Intake(g)-
(iii) 223.2

=FEED D=
-Weight Gain-
(iv) 51.2

=FEED E=
-Weight Gain-
(v) 26.3

=FEED F=
-Feed Intake-
(vi) 719.2

=FEED G=
-Weight Gain-
(vii) 58

=FEED H=
-Feed Conversion Ratio (FCR)-
(viii) 22.7

(5b)
(i) Feed H – 22.7
(ii) Feed B – 5

(5c)
(i) Meat
(ii) Skin
(iii) Bone
(iv) Fur
(v) Milk

(5d)
(i) Hydration
(ii) Hydrolysis
(iii) Oxidation
========================

(6ai)
(i) Individual method
(ii) Group method
(iii) Mass media

(6aii)
Individual method

(6aiii)
(i) It gives the poultry farmers proper understanding of the disease.
(ii) It will enhance practising

(6aiv)
(i) Inability to reach many poultry farmers
(ii) It is a time consuming method
(iii) It may be very expensive

(6b)
(i) Inadequate farm input
(ii) Inadequate fund
(iii) Inadequate skilled labour
(iv) Problem of distribution
(v) Inadequate farm machines

(6c)
(i) Red Sokoto
(ii) West African dwarf
(iii) Sahel
(iv) Nigerian dwarf goat
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