AGRICULTURE FORM 2 MARKING SCHEME
1. a) Entomology – study of insects and their 7. – wood file (Rasp)
control - metal file ½ x 2 =
b) pomology – growing of fruits
c) Apiculture – keeping or rearing of bees. b) hand scrapper
cabinet scrapper
d) Olericulture – growing of vegetables
spoke shave ½ x2 = 1
(1mk each =4mks) c) Wood chisel
2. i) Food supply – Adequate food supply en- cold chisel ½ x 2 – 1
sures a health population and a weathy na- d) Mortise gauge
tion marking gauge ½ x2 = 1mk
b) Source of employment – majority of the 8. – when opening up virgin land
population is employed either directly or -Where a stalk growing crop was previ-
indirectly by agriculture. ously planted
c) Provision of foreign exchange- This is -where the interval between primary and
foreign exchange which results from sale of secondary cultivation is long
cash crops e.g coffee -where land was left farrow for a long time
d) Source of capital (income) – Farmers 1x4 = 4mks
sell farm produce and get income. 9. Destruction of organic matter
e) Source of Raw materials for industries: Destruction of soil micro-organisms
These are farm produce sold to factories for Destruction of plant nutrients
processing Fire may spread to unintended areas 1x4 =
f) Provision of Market for industrial goods (4mks)
– Finished goods are sold to farmers for use 10. a) Farm practices aimed at weed control
g) Improvement of infrastructure – Roads, with minimum soil disturbance (1mk)
markets e.t.c are constructed to ease trans- b) -Mulching establishment of cover crop
port of farm produce (naming ½ mk- ex- -crop rotation, basin flooding ,
planation 1mk – Any acceptable expla- -timely cultivation
nation = 6mks) -timely planting use of herbicides
3. Form of Rainfall -slashing
distribution of rainfall -uprooting weeds 1x4 = 4mks
reliability of rainfall c) Reduce cost of cultivation
Amount of rainfall control soil erosion
Intensity of rainfall = ( ½ x4 = 2mks) maintenance of soil structure
4. -wind conserve moisture
-ice prevent root disturbance
-water prevent exposure of humus (1x4=4mks)
-temperature
5. – Decomposition of organic matter 11. Weir is a barrier constructed a stream or
-encourage aerate river to raise the level of water while a dam
- cause nitrogen fixation is a barrier constructed across of dry river
- Act as soil borne pests bed, stream or river to hold water back and
- cause sol borne diseases 1x 4 = 4mks form a reservoir. (2mks)
6. – Rip saw cuts along the grains while 12. a) plastic pipes, rubber pipes ½ x 2 = 1mk
cross- cut saw cuts along the grains b) Galvanized iron pipes , Aluminium pipes
- Rip saw has more teeth per unit length ½ x 2= 1mk
1x2 = 2mks
1
13. Soda ash – softening water naming b) i) -Removing roots,
½ x2 =1mk) -removing large stones
Allum – coagulation of solid par- - breaking heavy soils 1x1 = 1mk
ticles explanation ½ x 2 = 1mk
Chlorine - killing germs 20. -Good depth
(total 2mks -proper drainage
b) Kill diseases causing micro-organisms -good water holding capacity
Remove chemical impurities -adequate nutrient supply
remove bad smell an dbad taste -correct soil PH
remove sediments of solid particles 1x4 = -Free from excessive infestation of soil
4mks borne pests and diseases
14. – Domestic purposes 21. Macro –nutrients are plant elements in
-livestock use large amounts while micro nutrients are el-
-processing of farm produce ements needed in small amounts (2mks)
diluting chemicals 22. - root development
construction of farm building - stimulate nodule formation in legumes
irrigation of crops 1x4 = 4mks - needed in flowering, fruits and seed
15. a)Raised cambered bed 1mk formation
b) Drainage 1mk - hastens ripening of fruits
-Aerates the soil - involve in metabolic processes
-increase soil volume - it is part of nucleoproteins
- raise soil temperature - strengthens plant stems 1x4 = 4mks
-increases microbial activities 23. Single upper phosphates (S.S.P)
-reduce soil erosion Double super phosphates ( D.S.P)
-remove toxic substances 1x4 = 4mks Tripple super phosphates (T.S.P)
16. a) mature male pig Diamononium phosphates (D.A.P)
b mature female cattle Mavuno planting
c) young female cattle from weaning to 1st any other N.P.K fertilizer ½ x 4 = 2mks
calving 24. highly hygroscopic
d) young female bird from eight weeks to highly soluble in waer
point of lay short residual effect (short lived()
e) Bird kept for egg production easily leached
f) mature male rabbit or goat 1x6 = 6mks have a scorching (burning ) effect
17. – Toggenburg highly corrosive
-saanen highly volatile 1x4 =4mks
-British alpi9ne 25. Population = Area
Anglo- Nubian spacing
Jamnapari 1mk
18. Milk supply
-meat supply = 25m x 20m
-skin /hide 100cm x 50cm
-animal power 1mk
-fur 1x4 =4mks
19. a i) pick axe = 25 x 20 x 100 x 1000cm2
ii) sickle 1mk
iii) secateurs 100 x 50 cm2
iv) wool shear ½ x 4 = 2mks
2
= 1000 stems 1mk = 4mks) - right conditions for growth can easily
26. – law labour requirement be provided to seedlings
- healthy vigorously growing seedlings - reduced seed rate
are selected for transplanting - source of income
- small seeds can be nursed into strong
seedlings
