Verified Waec Agric Science Questions and Answers 2022/2023 | Essay & OBJ

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Agriculture+Obj!
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11BAABDBBAAA
21BACBBDDABD
31ADBACBCDBB
41CDDDADBDCA

 

(1a)
(i) To safeguard farmers against unreasonable eviction
(ii) To ensure that agricultural land is not unnecessarily diverted to non-agricultural purposes
(iii) To make large tracts of land available for government-sponsored development of large scale farms
(iv) To carry out large scale improvement such as irrigation, drainage and soil water conservation

(1bi)
Mechanical power

(1bii)
(i) It can handle more areas per unit of time
(ii) It works faster and more efficient
(iii) It can perform a wide range of operation
(iv) It reduces cost of labor and total cost of production

(1c)
(i) Seed tube: They conduct seeds from feed cups to the furrow lines
(ii) Furrow opener: It creates a well-defined groove in the soil where the seed can be placed at the proper depth
(iii) Hopper: holds particulate matter or flow-able material of any sort
(iv) Seed metering device: to collect seed in a singular or group fashion
(v) Furrow wheel: To stabilize the plough and take side thrust

(1d)
(i) Plough
(ii) Cultivator
(iii) Harrow

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

(2a)
(i) Monocropping: The practice of growing a single crop year after year on the same land.

(ii) Mixed cropping: It involves the growing of two or more species or cultivars of the same species simultaneously in the same field.

(iii) Mixed farming: It is a type of farming which involves both the growing of crops and the raising of livestock.

(iv) Crop rotation: the practice of growing a series of different types of crops in the same area across a sequence of growing seasons.

(2bi)
Phosphorus deficiency

(2bii)
(i) Anhydrous ammonia
(ii) Ammonium sulfate
(iii) Superphosphate
(iv) Urea-ammonium nitrate

(2c)
(i) Wax
(ii) Propolis
(iii) Old brood comb
(iv) Pheromones
(v) Essential oil
(v) Lemongrass oil

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

(3a)
(i) Storage pests: During storage, pests can infest crops if storage is not properly done.
(ii) Moisture: Maize can be destroyed if water finds its way into the maize grains.
(iii) Temperature: Maize will be destroyed during storage if temperature is not adequate
(iv) Poor aeration: When Maize grains during storage do not have access to moderate aeration, they can be damaged.

(3b)

(3c)
Mendel’s first law states that genes are present in pairs in non-reproductive cells so that each gamete contains only one contrasting factor. [SEGREGATION]

Mendel’s second law states that when more than one pair of factors are considered, each pair segregates independently of every other pair.[INDEPENDENT ASSORTMENT]

(3d)
(PICK ANY TWO)
(i) Alfalfa
(ii) Andropogon
(iii) Sorghum
(iv) Panicum
(v) Pennisetum
(vi) Axonopus

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

(4a)
[TABULATE]

(i) =CROP=
ONION

=BOTANICAL NAME=
Allium cepa

=CLASSIFICATION BASED ON USE=
Spice Crop

=METHOD OF PROPAGATION=
Vegetative propagation

(ii) =CROP=
GINGER

=BOTANICAL NAME=
Zingiber Officinale

=CLASSIFICATION BASED ON USE=
Spice Crop

=METHOD OF PROPAGATION=
Cutting

(iii) =CROP=
JUTE

=BOTANICAL NAME=
Corchorus Olitorius

=CLASSIFICATION BASED ON USE=
Latex Crop

=METHOD OF PROPAGATION=
Seed

(4b)
Total area = 36×10
= 360m³
Space = 0.36m³
Number of broiler = Total area/Space
= 360/0.36
= 1000

(4c)
(i) It increases the nutrient level of the soil
(ii) It ensures balsnced ration for livestocks while grazing
(iii) It reduces cost of feeding livestocks
(v) It reduces the attack of pests

 

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

1-10: CBAACBAADC

11-20: DAABBBDDBC

21-30: CDDDABBBBD

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

(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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