S3 Agriculture Test One March 2012

Brown sunken and water soaked spots on bean pods and stems are a sign of a disease called
1. bean rust.
2. bacterial wilt
3. bean anthracnose
4. Bean mosaic.
Which on of the following pests may cause loss of plant sap?
1. weevils
2. boll worms
3. termites
4. aphids
Which one of the following can best be used as a planting material for pineapples?
1. bulbs
2. bulbils
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3. stem cuttings
4. suckers
Topping in tobacco is done to;
1. encourage formation of wide leaves
2. restrict the height of the plant
3. stimulate the growth of suckers
4. speed up the maturity of the plant
The purple coloration of leaf margins in maize is a deficiency symptom of;
1. magnesium
2. calcium
3. phosphorus
4. potassium
Which of the following sets of disease is caused by the same type of organism?
1. cassava mosaic, tobacco mosaic and blight.
2. blight, coffee berry disease and rust.
3. black rot, maize streak and bacterial wilt.
4. blight, black rot and rust.
One of the effects of adding too much Agricultural lime to the soil is that;
1. soil acidity will be neutralized.
2. plant roots may be damaged.
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3. soil calcium will become unavailable to crops.
4. leaves will grow excessively
A banana plant was noted having yellow leaves, purple stem tissues and low yield. These are symptoms of;
1. banana bacterial wilt
2. fusarium wilt
3. panana disease
4. die back disease.
Which one of the following would be used to control mealy bugs on crops?
1. Nematicide
2. systemic insecticides
3. systemic fungicides
4. herbicides.
For which reason is “hardening off” usually practiced?
1. to accelerate growth.
2. to climatize to field conditions
3. to improve rooting
4. to ensure proper drying of seeds.
Beans and ground nuts are preferred in a crop rotation because they
1. increase the nitrogen content of the soil
2. take a short time to grow
3. give a good yield
4. control fungal disease and pests.
Which one of the following cotton pests can be controlled by growing hairy cotton varieties?
1. cotton stainer
2. American boll worm
3. spiny boll worm
4. jassid
Which one of the following is not a reason for secondary tillage?
1. helps to bury surface vegetation
2. controls weeds and crop pests
3. creates good condition in the soil for germination
4. level the soil and facilitates fertilizer application
Seedlings are transplanted during evenings in order to
1. minimize water loss from the plant
2. allow seedling make enough food before transplanting
3. allow roots absorb water
4. allow the seedlings to adjust to new conditions at night.
Which one of the following is a sucking pest?
1. American boll worm
2. aphid
3. weevils
4. cotton stainer.
Which of the following conditions are necessary for germination of crops?
1. water, sun light, suitable temperature.
2. oxygen, suitable temperature and water
3. warmth, good soil and oxygen
4. carbon dioxide, water, good soil.
Late blight is a disease of
1. coffee.
2. passion fruit
3. tomatoes
4. sorghum.
Nitrification is a process of
1. hydrolysis
2. reduction
3. oxidation
4. ammonification
Ground nut rosette disease is a disease caused by
1. bacterium
2. an aphid
3. a virus
4. a fungus.
Which one of the crops named below is not a cereal?
1. sorghum
2. grains
3. barley
4. rice
Armillaria root rot is a problem that occurs in
1. tea
2. pyrethrum
3. cashew nut
4. cocoa
The yellowing of a green leaf in arrow head patches is a symptom of
1. nitrogen deficiency
2. magnesium deficiency
3. zinc deficiency
4. excess of phosphorus.
Green leaves of plants serve the purpose of
1. protecting young growing tips from strong rays of the sun
2. making sugar for the plant
3. keeping the ground cool
4. preventing rapid evaporation from the ground.
The most reliable way of controlling the parasite weed striga is by
1. deep ploughing and drying it
2. mixed cropping for example with legumes
3. planting trap crops
4. by rooting cereals
Why should organic manure be well rotten before being applied to the vegetable garden?
1. to make it less filthy
2. to increase on the potassium content
3. to prevent competition for nitrogen by the purifying bacteria
4. to reduce acidity.
Slow growth rate of birds as a result of unbalanced feed is most common in which system of poultry keeping?
1. free range system
2. deep litter system
3. fold unit system
4. battery cage system.
One of the effects of sucking pests is that
1. they reduce leaf quality by discoloration
2. they unearth and eat planted seeds
3. they eat most of the contents of the seed
4. they eat away the apical stem and cause stunted growth.
Soils where intercropping is carried out do nod easily get exhausted since
1. there is timely planting
2. there is a lot of humus
3. different nutrients are taken up from different layers of the soil
4. a lot of humus is lost.
One of the effects of banana weevils is
1. interferes with nutrient uptake
2. premature ripening of fruits
3. yellowing of leaves
4. fingers rot at the tip
It is important to sow seeds at right depth so that
1. they mature early
2. seedlings will get properly anchored into the soil
3. seedlings get enough light
4. seeds are not wasted.
One of the reasons why most crops have to be sown in rows is
1. to ensure planting materials are not wasted
2. seedlings get enough mineral salts
3. seedlings are not uprooted by running water.
4. it increases yields.
It is important to carry out careful watering of seedlings
1. to economize the water
2. to add agricultural chemicals at the same time
3. to control seedling diseases like “dumping off”
4. to encourage water logging.
Which one of the following is not a benefit of mulching vegetables?
1. some dry mulching materials harbor pests
2. it encourages germination
3. it helps to control some soil born diseases
4. it conserves soil moisture.
Planting drills/furrows for sugar cane are supplied with Double supper phosphate
1. to control termite attack
2. to increase sugar content
3. to encourage root development
4. to keep nodes active.
Which group of the following belongs to the solanaceae family?
1. tomato, carrots, egg plant
2. tomato, dodo, cabbage
3. tomato, egg plant, nakati
4. tomato, egg plant, cabbage.
Cassava cuttings for propagation must have one of the following, which one is it?
1. cuttings should be from the middle portion of the plant
2. cuttings should have been stored for not less than 5 months to break dormancy
3. cuttings should be green and ready to make food by photosynthesis
4. cuttings should be dry.
An onion bulb is an example of
1. horizontal underground stem
2. horizontal underground stem swollen with food reserves
3. swollen adventitious roots
4. underground shoot with a very short stem.
One example of the crop that reproduces from a corn is
1. cocoyam
2. ginger
3. onion
4. Irish potato.
One common characteristic of crops propagated by vegetative means is that
1. there is more germination failure
2. there planting materials can be stored for a long time
3. small plants are obtained
4. multiplication of plant population is fast.
Why is it advised to interplant cotton with a legume at the planting time?
1. to eliminate weak seedlings
2. to avoid competition of water
3. to encourage vigorous growth of crops and increase its resistance to pests attack
4. to allow crop attain full size and facilitate packaging.
One of the factors that will determine the type of crop to grow in a area is
1. labor available
2. the rainy season
3. protection from trapping on the seedlings
4. the nitrogen flash.
Why is the gardeners’ trowel the best tool for lifting seedlings for transplanting?
1. it is cheap
2. it is easy to use
3. seedlings can easily be placed at the same depth they were in the nursery
4. seedlings can be scooped out with a ball of soil around the roots.
During the weeding of the ground nuts, why shouldn’t trash be heaped around the crop?
1. to avoid cutting the pegs
2. to avoid flower destruction.
3. to control diseases like ground nut blight
4. not to interfere with pod development
The following are the effects of delayed harvesting of ground nuts except one, which one is it?
1. seeds will shrink during drying and will have low oil content.
2. seeds will become mouldy and may have aflatoxin
3. a higher proportion of pods will break off
4. seeds will be eaten by rodents.
The pest that will cause the base of the bean to split is
1. nematodes
2. aphids
3. bean fly
4. downy mildew.
Why is it necessary to keep harvested Irish potatoes under shade?
1. to prevent potatoes from rotting
2. to prevent potatoes from getting green
3. to prevent potatoes from sprouting
4. to prevent potatoes from hardening.
Roguing in crop production means
1. uprooting and burning crops affected by diseases and pests.
2. regular weeding
3. removal of pests from crops
4. planting crops on the ridges.
The best fertilizer to add on coffee plantation on acidic soils is
1. sulphate of ammonium
2. CAN
3. SSP
4. DSP.
An example of aerial tubers that are inflorescence swollen with food and can be used for propagation is
1. bulbs
  
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2. bulbils
3. slips
4. stolons
During grafting, the part that is resistant to soil born disease is the
1. scion
2. stock
3. propagule
4. tongue.

S3 Agriculture Test One March 2012

Quiz