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Waec GCE 2020 Agric Science Question and Answers Now Posted


Agric Science Science

AGRIC OBJ
01-10: CADDDADCAC
11-20: AAACDDCDAD
21-30: BAABBCBDDC
31-40: CABCCAABBB
41-50: DBBBDCDAAC

COMPLETED


 (1a)

(i)they carry out research to improve or develop breeds of Animals.

(ii) extension project are founded and funded by them

(iii) provide basic amenities e;g water, feeder roads

(iv)they provide chemicals for the control of weeds and insect

 

(1b)

(i) expensive to practice

(ii)land problem

(iii)poor storage facilities

(iv)pests and disease attack

(v)it causes pollution

(vi)it leads to unemployment because machines are used

 

(1ci)

Deforestation is the permanent removal of trees to make room for something besides forest. This can include clearing the land for agriculture or grazing, or using the timber for fuel, construction or manufacturing.

 

(1cii)

(i)cause erosion

(ii)leads to loss of nutrients

(iii)exposure the soil to sunlight

(iv)reduce water percolation rate

(v)reduce the amount of rainfall

(vi)reduce wild life population

(2ai)
Disc plough
(i)it is designed to work in all type of soil function such as breaking
(ii)it is used to open the new fields
(iii)it can be used easily at rocky and rooted areas

(2aii)
Disc harrow
(i)it is used for cutting edges
(ii)it is used to till the soil were crop to be planted
(iii)it is also used to chop up unwanted weeds or crop remainders

(2aiii)
(i)it is used for cultivating small ginger
(ii)it is used for gathering and heaping the loose soil
(iii)it is an implement which cuts and turns the soil in two opposite direction

(2b)
(i)for root development
(ii)for respiration of soil micro organism
(iii)for absorption of plant and nutrients
(iv)needed for seed germination
(v) needed in the nitrogen and carbon cycle

(2c)
(i)Bush following
(ii)Crop rotation
(iii)Regular weeding
(iv)Proper storage of planting material

(3a)
Organic farming is an agricultural system which originated early in the 20th century in reaction to rapidly changing farming practices.

(3aii)
(a) it uses organic matter instead of air to enrich the soil
(b) it conserves soil for many years
(C) crop rotation helps organic farmers preserve their soil quality
(d) it helps to avoid monoculture
(e) it creates carried niches for organism that acts as natural foes of plant pest

(3b)
(i) it helps to conserve soil moisture
(ii) it helps to control wind and water erosion
(iii) it enhance soil nutrients
(iv) it plays a critical role in sustainable agriculture production

(3c)
(a) Cow pea – dicotyledon
(b) Tomatoe – dicotyledon
(c) Onion – dicotyledon
(d) Ginger – dicotyledon
(e) groundnut – dicotyledon
(f) Rice – monocotyledon
(g) pepper – dicotyledon
(h) Soyabeans – dicotyledon
(I) Okro – dicotyledon
(j) Citrus – dicotyledon
(k) Banana – dicotyledon
(L) Maize – monocotyledon
(m) Cocoa – dicotyledon

 

Q(4)

 

i. Staking is the practice of driving a stake or rod into the ground close to a plant to provide support for its stems.

 

ii. Hardening off is a term used to refer to the processes necessary for a plant to become acclimated to its environment. In the spring, it’s common practice to gradually accustom greenhouse vegetable seedlings to full sunlight and drying winds before planting them.

 

 

iii. earthing up or ridging is the technique in agriculture and horticulture of piling soil up around the base of a plant. It can be done by hand (usually using a hoe), or with powered machinery, typically a tractor attachment.

 

iv. Loading……………

(6ai)
Total depreciation = Cost – Salvage value
= 200,000 – 50,000
= #150,000

(6aii)
Annual depreciation = Total depreciation/no of use fuel life
= 150000/10
= #15,000

(6bi)
(i) He ensures regular supply of goods and services to the consumers.
(ii) Carry consumers problems to the wholesalers.
(iii) The retailers are responsible for the product promotion and advertisement by planning the product displays and visual merchandising for attracting the customers.

(6bii)
(i) Provides transport facilities.
(ii) Ensure regular supply of wide variety of goods.
(iii) Provides credit facilities to small retailers.

(6biii)
(i) Provides loan to farmers.
(ii) Teach farmers any new discoveries.
(iii) They offer assistance to farmers to improve the quality of their farm produce throughout careful grading and storage.

(6c)
(i) To get good quantity of rice grain during harvest.
(ii) To prevent diseases.
(iii) To increase the grain yield
(iv) To make more money by selling a quality rice

Completed


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