Answer all questions in this section in the spaces provided.
1. List two disadvantages of small scale farming. (1 mark)
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2. Name two ways by which predators affect agricultural production. (1 mark)
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..3. Name the role of each of the following chemicals in water treatment.
- Alum (½ mark) ………………………………………………………………………………………………………
- Soda ash (½ mark) ………………………………………………………………………………………………………
4. State two ways in which crop rotation controls weeds. (1 mark)
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..5. State four characteristics of a good vegetable seedling. (2 marks)
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6. Name two forms of horticulture practised in Kenya. (1 mark)
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7. State two mechanical methods of separating soil particles, according to size, during soil analysis.
(1 mark)
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8. State four reasons why a nursery is important in crop production. (2 marks)
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9. Name the part used for vegetative propagation of each of the following plants. (2 marks)
- Cassava ………………………………………………………………………………………………
- Sisal ……………………………………………………………………………………………………
- Pyrethrum ……………………………………………………………………………………………
- Sweet potatoes ………………………………………………………………………………………
10. State four reasons for applying phosphatic fertilizers during planting. (2 marks)
………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
11. Give two reasons for testing soil. (2 marks)
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12. State four management practices undertaken to improve natural pastures. (2 marks)
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13. State four qualities of certified seeds. (2 marks)
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14. Name four classes of weeds. (2 marks)
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15. State three causes of land fragmentation in Kenya today. (1½ marks)
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16. State any three organic farming practices. (1½ marks)
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17. What is meant by the term production function? (1 mark)
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18. What is meant by the term integrated pest management? (1 mark)
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19. Give three examples of fixed costs in maize production. (11/2 marks)
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20. State three factors that determine the choice of water pipes used on the farm. (11/2 marks)
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SECTION B (20 MARKS)
Answer all questions in this section in the spaces provided.
21. The diagram below shows a section of plant from which the planting material illustrated was obtained.
- Identify the planting material illustrated. (1 mark)
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- Give two reasons why only the middle part of the plant was used to prepare the planting material.
(1 mark)
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- Apart from using the middle part of the plant, explain three precautions that should be observed when preparing the illustrated planting material. (3 marks)
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22. The diagram below illustrates seed potato which has been prepared for planting. Study it carefully and answers the questions that follow.
- Name the practice that has been used to prepare the seed potato above for planting. (1 mark)
………………………………………………………………………………………………………..
- Describe the procedure followed in preparing seed potatoes for planting. (4 marks)
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23. The diagram below illustrates a newly constructed cut-off drain. Study it carefully and answer the questions that follow.
Identify the parts of cut off drains labeled A and B. (2 marks)
A ……………………………………………………………………………………………………
B ……………………………………………………………………………………………………..
ii) How can the part of the structure labeled B be stabilized after it has been constructed? (2 marks)
………………………………………………………………………………………………………………………………………………………………………………………………………………..
iii) State any one factor that would determine the width and depth of the cut-off drain. (1 mark) ………………………………………………………………………………………………………
24. The diagrams below show a set up of an experiment to study an aspect of soil. The set up was left undisturbed for five hours. Study it and answer the questions that follow.
- What was the aim of the experiment? (1 mark)
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- State one observation that was made in each of the flasks labelled C and D. (2 marks)
C ……………………………………………………………………………………………………..
D ……………………………………………………………………………………………………..
- Give a reason for each of your answers in (b) above. (2 marks)
C …………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………………………………………………………………
D …………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………………………………………………………………………
SECTION C (40MARKS)
Answer any two questions from this section in the spaces provided after question 27.
25 a) Explain seven factors that should be considered when selecting seeds for planting. (7 marks)
b) State four benefits of adequate and reliable rainfall in vegetable crop production. (4 marks)
c) Explain four factors that determine the nutrient content of hay. (4 marks)
d) State five reasons for keeping farm records. (5 marks)
26a) State the importance of any five nursery management practices. (5 marks)
b) Explain seven cultural methods of soil and water conservation. (7 marks)
c) Describe the role of magnesium in crop production. (4 marks)
d) Describe four practices that a farmer should carry out to ensure uniform germination of seeds.
(4 marks)
27 a) Explain five factors that determine the spacing of crops. (5 marks)
b) Explain five factors that may encourage soil erosion. (5 marks)
c) Describe five management practices that should be carried out on a vegetable nursery after sowing seeds until the seedlings are ready for transplanting. (5 marks)
d) State five soil factors that should be considered when selecting a crop to grow in an area. (5 marks)
KCSE Agriculture Prediction Questions Marking Schemes
- State four reasons why rabbit rearing is gaining a lot of popularity in Kenya. ( 2mks)
Have low food requirements
Have low space requirements
Can do well in virtually all environments
There urine and waste are source of good quality manure (½ x 4 = 2 marks)
- State the functions of the following tools.
- Claw bar . (1mk)
For removing long nails from wood, straining fencing wires or digging fencing holes (1 x 1= 1 mark)
- Mortise gauge. (1mk)
Used to mark two parallel lines on wood. The distance between the lines is adjusted by moving one of the spurs. (1 x 1 = 1 mark)
- State four characteristics of merino sheep. (2mks)
-Muzzle is flesh coloured
Their wool, hooves and horns are white
The have a dropping rump
Small in body and angular in form
Have a narrow chest hence a close together front
Hardy and does well in extensive conditions
Have a good flocking instinct
Produce fleece that is highly valued, long stapled and low in shrinkage. (½ x 4 = 2 marks)
- A plumber was called to repair a water pipe that was leaking. List four tools that he would probably use.
-Stock and die
-Pipe wrench
-Pipe cutter
-spanner (½ x 4 = 2 marks)
- State four factors that influence the variation or the rate of respiration in animals. ( 2mks)
-body size of the animal
-amount of exercise done
-degree of excitement
-Ambient or environmental temperature
Health of the animal (½ x 4 = 2 marks)
- State four disorders that may result in animals due to mineral deficiency. (2mks)
Anaemia due to lack of iron
Curled toe paralysis due to lack of calcium and phosphorus
Milk fever due to lack of calcium
Goiter due to lack of copper
Swayback in lambs due to lack of copper
Bovine ketosis or acetonemia due to impaired metabolism of carbohydrates and volatile fatty acid
Osteomalacia due to lack of phosphorus. (½ x 4 = 2 marks)
- State four effects of keds in sheep (2mks)
-irritation under heavy infestation
-Animal scratches and bites itself thus damaging the wool
-Retarded growth in lambs
-Anaemia (½ x 4 = 2 marks)
- Mention four factors that determine the amount of water required by an animal ( 2mks)
-Ambient temperature
-Type of food eaten by an animal
-Level of production or amount of work done
-Weight of the animal or body size
-Species of the animal (½ x 4 = 2 marks)
- Mention four reasons for steaming up in cattle. ( 2mks)
-Provide nutrients for maximum foetal growth
Buids up energy for parturition
Ensures birth of a healthy animal
Promotes good health of the mother
Increases and maintains high milk yield after birth (½ x 4 = 2 marks)
- Differentiate between crutching and ringing in animals. (2mks)
Crutching is the cutting of wool round external reproductive organs of female sheep to facilitate mating and prevent infection while ringing is the practice of trimming wool around the sheath of the penis of the rams to facilitate mating. (2 x 1= 2 marks)(marked as a whole)
- . State four characteristics of a poor layer. (2mks)
Skin colour is yellow in the vent, legs and beaks
Combs, wattles and vent become shriveled
Width between pelvic bones is narrow hardly fits two figures
Eyes are dull
Breast become hard (½ x 4 = 2 marks)
- List two types of lambing management in sheep (1mk)
Drift lambing
Pen lambing (½ x 2 = 1 marks)
- State four disadvantages of battery cage system of rearing birds. ( 2mks)
- Initial cost is expensive
- High level of management and technological management
- In case of disease outbreak spread is very fast.
- Birds develop bruises on combs, breasts an toes as they stick their necks out to eat and walk in cages
- Birds do not have room for exercise
- System is not good for brooding and rearing chicks (½ x 4 = 2 marks)
- State four advantages of the Kenya top bar hive (2mks)
-top bar can be removed for inspection of the combs and replaced
-Honey combs can be removed without disturbing the brood
-Honey is of high quality without brood due to queen excluder
-More wax is harvested as combs are not returned
-Easy to construct and repair (½ x 4 = 2 marks)
15. State two symptoms of black quarter on a carcass of cattle. (1mks)
-Blood oozes from the anus and nose of the dead animal
-If affected muscles are cut they appear dark
-There is a bloody froth with a smell of rancid butter. (½ x 2 = 1 marks)
- Name two types of lubrication systems in a tractor. (1mk)
-splash feed type
-Force feed type
-Oil mist type (½ x 2= 1 marks)
- State two ways of controlling bloat in cattle. (1mk)
-manual means by exercising the animal or massage the animals abdomen to help eject gases
-surgical means by use of stomach pump or use of a troca and cannula
-Chemical means by drenching using oils like turpentine oil mixed with vegetable oil or use of Epsom salt or use of methyl silicone injection on the rumen. (½ x 2 = 1 marks)
SECTION B
18. State the names of the pig breeds above
X-berkshire
Y-essex saddle back
Z-wessex saddle back (1 x 3 = 3 marks)
b) State two differences between large white and landrace breeds of pigs. (2mks)
| Large white | Land race |
| Snout broad and slightly dished | Snout straight |
| Ears upright | Long ears drooping over the face |
| White but may have few blue spots | White in colour |
(any 2x 1 = 2 marks)
19. a) Name the parts labelled J and L
J-inlet
L-outlet (1 x 2 = 2 marks)
b) State the function of part labelled K (1mk)
-direct away excess water during floods or excess rainfall to avoid caring away of fish
(1 x 1 = 1 marks)
c) Explain how fingerlings are introduced into a pond. (2mks)
They are made to acclimatize first with the water then they are allowed to get into the water at will
(1 x 1= 1 marks)
20. a) State the nutrient that chick A may be lacking (1mk)
Manganese
(1 x 1= 1 marks)
b) State the name of the disease that chick B is suffering from? (1mk)
Newcastle
(1 x 1= 1 marks)
c) What other symptom can be shown by breeding birds lacking the nutrient name a) above? (1mk)
Reduced hatchability
Reduced shell thickness
(1 x 1= 1 marks)
d) State two control measures of the disease indicated by chick B (2mks)
-kill all birds and burn them
-Vaccination
-Quarantine
(2 x 1= 2 marks)
21. a) Name parts L and M
L Gland cistern
M Teat cistern
(1 x 1= 1 marks)
b) State the hormone responsible for milk let down. ( 1mk)
Oxytocin
(1 x 1= 1 marks)
c) Define dry cow therapy. (1mk)
Application of antibiotics in the teats of a cow during the drying off period to avoid mastitic infection
(1 x 1= 1 marks)
d) Why should milking be done very quickly and evenly. (1mk)
The effect of oxytocin lasts for a very short time (5 to 7 minutes).the animal may hide milk.
(1 x 1= 1 marks)
Section C (Answer any two questions. Each question carries 20 mks))
- a) Explain five causes of livestock diseases. (5 mks)
-nutritional causes e.g. deficiency in minerals like iron leading to Anaemia
-amount of food eaten by an animal e.g. bloat due to excess intake of lush pasture
-physical causes e.g. physical injuries or excess application of pressure
-chemical causes e.g. ingestion of poisons like herbicides, acids, insecticides etc.
-infectious living organisms e.g. bacteria, viruses, protozoa, parasitic organisms
(5 x 1= 5 marks)
b) Describe the life cycle of a beef tape worm. (10mks)
-a human drops tape worm segments called proglottids full of eggs with faeces
-once outside the eggs are released from the segments
-They are picked by the right intermediate host (cattle) when feeding
-After being ingested they hatch in the intestines into embryos
–The embryos penetrate the intestinal wall and enter the blood stream
They move to the liver and then are distributed through the body into the muscles
-They become cysts
-Cysticercus cellusosae (the bladder worm) prefers muscular tissue
-If under cooked beef with cysts is eaten by human being he gets re infected.
-In the intestine, the cysts wall dissolves and the parasite attaches itself on the wall of the intestine then developed to adult tapeworms.
(10 x 1= 10 marks)
c) Explain five reasons for inbreeding in livestock. (5 mks)
-to increase genetic uniformity in the herd through increasing homozygozity
-used to fix required characteristics in the new breeds
-to increase phenotypic uniformity
-Used to get proven sires .possible by back crossing sires with their daughters
-Used in animals of high prepotency. Can test ability of animals to pass desirable characteristics to offspring
(5 x 1= 5 marks)
- a) Describe ten factors considered when selecting breeding stock. (10 mks)
-Age .select young animals that have parturated for not more than 3 times
-level of performance. Select animals of high performance
-physical fitness. Select animals free from any defects
-health .select healthy animals
-body conformation. Select animals with proper body conformation
-temperament /behavior. Avoid animals with undesired behavior.
-Quality of products. Select animals that give products of high quality
-Mothering ability. Select animals with good mothering ability
-Adaptability. Select well adapted animals
-Prolificacy. Select animals that are highly prolific.
(10 x 1= 10 marks)
b) Describe the life cycle of a bee. (5mks)
-fertilized queen lays eggs in cells
-the warmth and moisture generated by a cluster of worker bees allow the eggs to hatch after 3 days to larva
-the larvae are fed by nurse bees on special pulp (pollen and honey) they spin into a cocoon and moult into pupa
-the pupa becomes a young bee after ten days and emerges from the cocoon.
(5 x 1= 5 marks)
c) Explain the procedure of establishing a barbed wire fence. (5mks)
-clear the fence line i.e. 2m wide
-Measure and mark points on the fence line where holes are to be dug determing the position of the gate. Spacing should 4-6 m depending on use.
-Dig holes to a depth of 60 cm for main fence and 75-90 cm for corner and gate posts
-Place treated posts in the holes in an upright position
-Mix concrete of 1:3:5 ratio and place in the hole or ram to firm the base
-Nail barbed wire onto the posts with fencing staples while stretching using a wire strainer
-Fix the lower strand first and used it as a guide to fix the rest.
(5 x 1= 5 marks)
- a) Explain ten short service practices done on a tractor. (10mks)
• Checking the engine oil daily by use of a dip stick. If the oil level is low, it should be added.
• The fuel level should be checked at the start of every day’s work and added if necessary.
• Water level in the radiator should be checked and if possible topped up.
• The level of the electrolyte should be checked daily and topped up with distilled water accordingly.
• Nuts and bolts should be tightened every day.
• Lost nuts and bolts should be replaced before the day’s work.
• Grease should be applied by use of grease gun through the nipples.
• Large sediments from the sediments bowl should be removed.
• The tyre pressure should be checked daily before the day’s work.
• The fan belt tension should be checked to ensure that it deflects between 1.9cm and 2.5cm when pushed.
• The brake shaft bearing should be greased.
• The brake fluid level is maintained at the recommended level.
(10 x 1= 10 marks)
b) Describe the management of chicks in a brooder up to nine weeks. (10mks)
- Start 2-3 days before arrival.
- The brooder house should be cleaned to remove old litter and then disinfected.
- New litters 5-10cm high should be put in and covered with absorbent materials/newspapers. Removed when chicks learn what food is.
- Equipment should be cleaned, disinfected and tested to make sure that they are working.
- Feed and water should be placed into shallow containers.
- Chicks are placed in the brooder during the day to familiarize with the brooder.
- If chicks arrive stressed and weak they should be given glucose solution in the waterers.
- In case the heat source is charcoal burners they should be covered with wire mesh.
- Feed chicks with chick mash which is later mixed with growers mash as the chicks grow.
- Clean water should be provided and changed regularly.
- Any vices should be checked and controlled.
- Any dead chicks should be removed as soon as seen.
- Ventilation should be used to control the temperature and humidity in the brooder.
- Constant disinfection is required at the entrance to avoid diseases.
- Brooder space should be increased as the chicks grow.
- Introduce roosts in the 6th week
- Provide grit to help in digestion
- Debeaking should be done at 10 days old.
- Vaccination against diseases such as Gumboro after 2 weeks, New Castle at 3-4 weeks and fowl typhoid at 7 weeks.
- Dusting to control external parasites.
- Growers’ mash should be introduced gradually at 7 weeks old.
- Chicks are removed from the brooder when they are 8 weeks old.
- On average the chick uses about 1.5kg – 2.2kg of chick mash by the time it is 8 weeks old.
- In the 9th week chicks are fed on growers mash only and are taken to main poultry house.
(10 x 1= 10 marks)
