2021 WAEC AGRICULTURAL SCIENCE PRACTICAL ANSWERS

2021-WAEC-AGRICULTURAL-SCIENCE-PRACTICAL-ANSWERS⇓

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AGRIC-PRACTICAL-ANSWERS

(1a)
A is an enlarged pair of scissors which possesses two long metal blades and two handles which may be wooden, metal, rubber or plastic. The blades are sharpened at one edge and are connected to the pivot by bolt and nut.

(1b)
SPECIMEN A;
(i) It is use for pruning process
(ii) It is used for cutting flowers

SPECIMEN B;
(i) It is use for weeding
(ii) It is used for trimming hedges or shrubs

(1c)
SPECIMEN A;
(i) Store in a cool dry place
(ii) Clean or wash after use
(iii) Keep away from rain to prevent rust

SPECIMEN C;
(i) Store in a cool dry place
(ii) Always wash and clean after use
(iii) Sharpened the blade properly

(1d)
(i) Hoes
(ii) Hand Trowel

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(2a)
TABULATE PLS

SPECIMEN E;
(i) It is liquid
(ii) Rich in Nitrogen
(iii)It decreases cadbium concentration in the soil
(iv) It gives lower shoot dry matter
(v) It can be applied through irrigation system
(vi) It is an inorganic substance

SPECIMEN G;
(i) It is solid
(ii) Not rich in Nitrogen
(iii) It does not decreases cadbium concentration in the soil
(iv) It gives higher shoot dry matter
(v) It can not be applied through irrigation system
(vi) It is an organic substance

(2bi)
Nitrogen

(2bii)
(i) NPK Fertilizer 15:15:15
(ii) Nitrate
(iii) Ammonia

(2c)
(i) It can damage plants
(ii) It impedes seed germination
(iii) It is not stable
(iv) It affect seedling growth
(v) It affect early plant growth in the soil

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(3a)
(i)Specimen H: Centrosema pubescens

(ii)Specimen I: Pennisetum purpureum Schumach.

(iii)Specimen J: Pueraria phaseoloides

(3b)
(i)Specimen H: is propagated by seed

(ii)Specimen I: is propagated vegetatively through stem cuttings

(iii)Specimen J: is propagated by seeds

(3c)
(i)It is a vigorous twining, trailing and climbing perennial legume.
(ii)It has a deep root-system with tap roots and lateral roots.
(iii)It Leaves are dark green and trifoliate
(iv)Leaflets are ovate, 4 cm long x 3.5 cm broad.
(v)It Flowers are borne in axillary racemes, are bright or pale lilac with violet stripes.

(3d)
(i)It is used for traditional animal feed,
(ii)It is used for pest management
(iii)It is used for improving soil fertility
(iv)It is used for protecting arid land from soil.

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(4a)
(i)Marketing board
(ii)Producer
(iii)Wholesaler
(iv)Retailer

(4b)
The process is known as Pasteurization. It involves heating raw milk to a high temperature and then immediately cooling. It should be noted that the heating is just for 15seconds and the temperature is 72°C

(4c)
(i)calcium and protein
(ii)potassium and phosphorus
(iii)vitamins B2 and B12.

(4d)
(i) It reduces the production of M in livestocks
(ii) It affect the quantity of M produced
(iii) It makes the animal to become weak
(iv) It also affect the quality of M produced
(v) It affect the nutrient level of M produced

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