SECTION A (30 marks)
Answer all the questions in this section in the spaces provided.
- State two ways in which the foreign exchange earned from agriculture is important to Kenya. (1 mark)
- State four effects of excessive nitrogenous fertiliser application on tomatoes. (2 marks)
- State four ways in which burning during clearing of land reduces soil fertility. (2 marks)
- State four ways in which water pollution caused by farming activities can be controlled. (2 marks)
- What is meant by the term preference and choice as used in agricultural economics? (2 marks)
- State four disadvantages of shifting cultivation.(2 marks)
- Name four categories of nursery beds. (2 marks)
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- What is meant by the term conveyance of water? (1 mark)
- State two ways of conveying water. (1 mark)
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- What is meant by the term land tenure reform? (1 mark)
- State four advantages of land registration.(2 marks)
- Name four types of landslides. (2 marks)
- State four advantages of small scale farming in Kenya. (2 marks)
- State four disadvantages of stall feeding. (2 marks)
- Give four reasons why livestock farmers prepare silage.(2 marks)
- State four reasons for carrying out minimum tillage. (2 marks)
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Name four financial documents used in farm accounting. (2 marks)
SECTION B (20 marks)
Answer all the questions in this section in the spaces provided.
- The diagram below shows certain weeds
- Identify the weeds labelled F and G.
- State one way in which each of the weeds labelled E and F affects the quality of livestock products.(1 mark)
- State the main way in which the weed labelled G interferes with farm operations. (1 mark)
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- An agronomist recommends application of 120kg N, 60kg P,0 and 80kg K,O after testing a soil sample. Calculate the amount of urea (46%N), single super phosphate (20%P,0) and potassium oxide (50% K,O) that should be applied on the land.(4 marks)
- Distinguish between fertiliser ratio and fertiliser grade. (1 mark)
- A farmer has a piece of land 200 m long and 36m wide. If the farmer plants beans at a spacing of 30 cm X 15 cm, calculate the plant population on the piece of land. Show your working.(5 marks)
- The diagram below shows a practice in agroforestry.
- Identify the practice. (1 mark)
- State the importance of the activity labelled:(1 mark)
- Why was the soil separated as shown in the activity labelled II? (1 mark)
- State the main precaution observed when covering the seedling as illustrated in III. (1 mark)
SECTION C (40 marks)
Answer any two questions from this section in the spaces provided after question 22.
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- Describe seven ways in which a farm manager can provide incentives to increase the productivity of the farm workers. (7 marks)
- Describe Blossom End Rot disease in tomatoes under each of the following sub-headings:
- symptoms (1 mark)
- causes (3 marks)
- control measures. (3 marks)
- Describe how a farmer should handle a bean crop from the time it is harvested until the dry seed is ready for storage. (6 marks)
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- Give two effects of low temperature on crop growth. (2 marks)
- Explain four aspects of rainfall that a farmer should consider when choosing a crop to grow. (8 marks)
- Describe five types of layering used by farmers to propagate crops.
- Give five functions of agricultural marketing boards in Kenya.
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- Describe rice production under each of the following sub-headings:
- land preparation (3 marks)
- water control (3 marks)
- weed control (2 marks)
- Describe millet production under each of the following sub-headings:
- seedbed preparation (2 marks)
- planting (2 marks)
- harvesting (3 marks)
- Explain five factors that influence mass wasting. (5 marks)
- Describe rice production under each of the following sub-headings:
MARKING SCHEME
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- Used to service foreign debts
- To finance imports e.g drugs fertilizers, machines
- To finance government projects e.g schools, hospitals, roads etc
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- Prolonged maturity
- Cracking of fruits before maturity
- Blossom end rot
- Too much negative growth
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- Leads to loss of soil moisture
- Destroys soil organisms
- Destroys soil organic matter
- Exposes soil to agents of soil erosion
- Volatilizes soil mineral compunds
- Accumulates ash which alters soil pit and mineral availability
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- Controlling soil erosion [accept any method of controlling soil erosion]
- Fencing water sources [avoid animals drinking directly from the water source]
- Controlled use of agricultural chemicals /use of intergrated methods
- Establishment of vegetation along river banks
- Use of non-chemical methods/ organic farming
- Production resources are limited while production needs are many/unlimited with many competing enterprise(s) amongst many to use the limited resources (mark as a whole)
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- The total field per unit area is low
- Alot of time and labour wasted when farmer is shifting and building road structure
- Farmers have no incentives to develop land and conserve water and soils
- Not applicable in areas of high population density or where there is high population increase
- Should be practiced where land is abundant/adequate/comunially owned
- It leads to land fragmentation
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- Sunken nursery
- Raised nursery
- Vegetable crop nursery
- Tree nursery
- Vegetative propagation nursery
- Bare root nursery/ direct/ swaziland nursery
- Containerized nursery
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- The process of moving water from the point of storage or source to where it will be used or stored
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- Piping
- Use of canals
- Use of containers
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- It's any organized action designed to improve land use and ownership [accept specific types of reform]
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- Can be used to secure credit facilities
- Ensures security of tenure/ reduces land grabbing
- Encourage investment in long-term/ permanent projects
- Owners of land can lease/sell all or part of land
- Reduces land disputes
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- Slump/ slip
- Debris slides
- Rock fall
- Rock slides
- Debris fall
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- High production, per unit acre
- Use of improved technology
- Diversification/ mixed farming
- Low capital investement
- Surplus produce can be sold for an income
- Enhances food security of household and national level
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- High initial capital is required
- Requires high skilled labour
- More labour intensive
- Diseases can easily spread
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- To distribute available forage throughout the year
- To maximise the utilization of available land
- To provide feed for the dry season
- Excess forage can be sold
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- Maintains soil structure
- Conserves soil moisture
- Reduces land preparation costs
- Maintains soil cover/ reduces exposure to agents of soil erosion
- Reduce disturbance of roots
- Reduce exposure of humus
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- Invoice
- Receipts
- Delivery note
- Purchase order
- Statement of account
SECTION B
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- F - Black Jack(Bidens Pilosa)
G - Stinnging nettle (urtica dioica) - E - Poisonous to livestock
G - Contaminants wool and fur - It irritates farm workers
- F - Black Jack(Bidens Pilosa)
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- Urea(46% N)
120 x 100kg urea = 260.87kg
46
46kg N - from 100 kg urea
so 120kg N → 100/46 x 120
= 260.87kg - SSP(20%P2O5)
60 x 100 kgSSQ = 300kg SSP
20
20kg P2O5 from 100kg SSP
60kg P2O5 → 100/20 x 60
= 300 kg SSP - KCl (50% K2O)
80 x 100 kg KCl = 160KCl
50
50kgK2O from 100kg KCl
so 80kg K2O → 100/50 x 80
= 160kg KCl
Plus/ more for proper calculation/ proper interpretation
- Urea(46% N)
- Fertilizer ratio refers to the proportion of the three primary macronutrients in a fertilizer e.g NPK(10:10:10)
Fertilizer grade indicates the amount of each nutrient contained in a fertilizer e.g urea (46%N)
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- Area of land
spacing
= 36 x 200m 2
0.3n x 0.15m
=7200
0.045
= 160,000 Plants- Area of land
spacing
= 36 x 200m
30cm x 15cm
=(36 x 200)m 2
(0.3 x 0.15)m2
=7000
0.045
= 160,000 plants - Area of land
spacing
= 36 x 200m
30cm x 15cm
=(3600 x 20000)cm2
(30 x 15)cm2
720 000 000
450
= 160,000plants - Area of land
spacing
Area of land
= 200m x 36m = 7200m2
Spacing = 0.3 x 0.15m2
Area occupied by one crop = (0.3 x 0.15m2)
= 0.045m2
Plant population =7200
0.045
= 160, 000plants - Plant population = Area of land
spacing
Area of land
= 20000 x 36000 cm
= 720000000cm2
spacing = 30cm x 15cm
Area occupied by one plant = 30 x 15
= 450cm2
Plant poppulation =72000000
450cm2
= 160,000 plants
- Area of land
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- Tree seedling transplanting/ tree planting/ transplanting
- I - To allow the growth of roots in the planted hole
IV - To plant the seedling at the same depth it was in the sleeve - To facilitate mixing of top soil with manure for filling the planted holes
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- Should allow light penetration
- Materials/ sticks used should be strong enough
- Should provide enough space for growth
- Rails should not allow animal penetration
SECTION C (40 marks)
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- Medical facilities
- Housing
- Security
- Rewarding good workers
- Better remuneration
- Transport provision
- Protective clothing/uniform
- Bonus
- Safe working environment
- Provide good working tools
- Provide social activities by schools for their children
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- Blossom end appears rotten, water soaked; dry
- Too much nitrogen in early growth stages
- Irregular or infrequent watering
- Calcium deficiency
- Regular watering
- Top dressing the crop with the right amount of nitrogen
- Application of calcium compound fertilizers in the soil
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- Threshing: Removal of beans from pods by beating with sticks
- Drying: Beans are dried bean plants spread on whats in the sun to dry
- Cleaning: To remove foreign materials before storage. by winnowing
- Sorting bean seeds are also sorted to separate the good from the bad
- Dusting: Applying chemical powders on seeds to
- Packing - Beans are placed into containers for storage
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- Slow growth rate of crops as the process of photosynthesis is slowed.
- High incidence of disease infection to crops, eg. CBD, hot and cold disease of coffee; Elgon die back/ low incident of disease
- Quality of crops, e.g. tea and pyrethrum is improved
- Covered/quality of crops is affected
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- Rainfall reliability:/ Predictability
This determines the time of land preparation and planting. - Amount of rainfall is the quantity of rain that falls in a given area within a given year. Determines the type of crops to be grown
- Rainfall distribution is the humber of wet months in a year
Influences choice of crop varieties to grow. - Rainfall intensity: This is the amount of rain that falls in an area within a period of one hour. Rainfall intensity should be correct to prevent damage to crops& soil erosion
- Rainfall reliability:/ Predictability
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- Aerial layering/marcotting: Bark and cambial layer are removed from a section of the branch, moist rotting medium is heaped
around the section and wrapped with a polythene sheet; - Tip layering: Shoot with a terminal bud is bent to the ground and covered with a layer of moist soil;
- Trench layering: A branch is bent, laid in a trench and held in position using pegs, and covered with a layer of moist soil;
- Compound/serpentine layering: a branch is bent several times and held using pegs. Bent parts are covered with a layer of moist soil:
- Stool and mound layering: soil is heaped around the base of the stem which gives rise to new shoots;
- Aerial layering/marcotting: Bark and cambial layer are removed from a section of the branch, moist rotting medium is heaped
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- Regulate and control of production, of specific products.
- Licensing production and export.
- Quality control.
- Carrying research on different aspects of the crop or livestock in question on behalf of the government.
- Acting as the sole agents on all matters concerning the crop or livestock.
- Marketing of processed products.
- Advising the Minister for Agriculture on the importation or exportation of the products in relation to their availability.
- Provide and co-ordinate different sectors of production
- Advising farmers on different aspects of production
- Provide farmers with input on land prices
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- Rice fields are levelled; bunds constructed around them for controlling water level
- Tractor drawn rotavators are used to prepare flooded fields
- Digging with jembe is also used to prepare before the fields are flooded
- Flood the fields
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- Water level in the field is increased from 5cm at planting time gradually to 15cm when seedlings are fully grown./Maintain water level
- Water is allowed to flow slowly in the fields.
- Where flow is not possible, old water should be drained and fresh water added every 2-3 weeks.
- Drain water completely before harvesting
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- Weeds are controlled by flooding.
- Surviving weeds are controlled by uprooting.
- Effective herbicides can also be used
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- Clearing of land;
- Primary cultivation;
- Secondary cultivation/ fine tilth
- Prepare land early
- Planting of millet
- Early; planting by broadcasting/row planting at 30x33 cm spacing
- Seed rate should be 3 - 5 kg
- Harvesting of millet
- Individual heads are cut using knives;
- The heads are dried.
- The dry heads are threshed
- Seeds are winnowed
- When heads are dry
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