WAEC SSCE - Agricultural Science - 2002
Swali 1 Ripoti
An acidic soil can be neutralized by the addition of
Maelezo ya Majibu
An acidic soil can be neutralized by the addition of wood ash. Wood ash contains calcium, magnesium, and potassium compounds, which can react with the acidic soil and neutralize it. The reaction forms water and salts, which help to increase the soil's pH, making it less acidic. Additionally, wood ash also contains nutrients such as phosphorus and potassium, which are essential for plant growth. However, it is important to note that excessive use of wood ash can lead to an alkaline soil, which is also not ideal for plant growth.
Swali 2 Ripoti
Which of the following is not an effect of water-logging on crop production? it
Maelezo ya Majibu
The correct answer is "causes plant roots to wilt". Waterlogging is a condition in which the soil becomes saturated with water, leading to the reduction or lack of oxygen available to plant roots. This situation can affect plant development by inhibiting the activities of microorganisms that are essential for nutrient availability, thereby reducing nutrient uptake and leading to the eventual death of plant roots. Waterlogging also encourages leaching, which is the loss of nutrients from the soil, leading to reduced crop yield. The condition does not cause plant roots to wilt. Instead, the roots become swollen and may turn brown or black due to lack of oxygen, leading to plant death.
Swali 3 Ripoti
The daily maintenance practice carried out on a disc harrow is
Maelezo ya Majibu
The daily maintenance practice carried out on a disc harrow is cleaning the soil off the disc. This is because during its operation, the disc harrow cuts through the soil, and soil and debris can accumulate on the discs and impede its efficiency. Therefore, it is essential to clean the disc harrow after each use to ensure that the discs are free of soil and debris for optimal performance.
Swali 4 Ripoti
The process of inducing root development on portions of stems still attached to the parent plant is known as
Maelezo ya Majibu
The process of inducing root development on portions of stems still attached to the parent plant is known as layering. This is a method of propagating new plants from existing plants. In layering, a portion of the stem of a plant is bent down and partially buried in the soil, while still attached to the parent plant. Roots will grow from this buried portion of the stem, and once the roots are well established, the new plant can be separated from the parent plant and grown independently.
Swali 5 Ripoti
A sow is normally expected to farrow
Maelezo ya Majibu
A sow, which is a female pig, is normally expected to farrow (give birth to piglets) twice a year. This is because the gestation period of a sow is about 3 months, 3 weeks, and 3 days, which means that a sow can have two litters of piglets in a year. However, the number of piglets in each litter can vary depending on various factors such as the breed of the sow, the health of the sow, and the quality of the feed.
Swali 6 Ripoti
Which of the following sources of farm power is most flexible and adaptable to farm operations?
Maelezo ya Majibu
Among the given options, the most flexible and adaptable source of farm power is human power. Human power refers to the use of human labor to perform various farm operations like planting, weeding, harvesting, and transportation of crops. It is flexible because human labor can easily adapt to different farm conditions and tasks. For instance, a person can switch from weeding to planting or harvesting without requiring additional equipment or training. Human power is also adaptable because it can be used in different types and sizes of farms, from small family farms to large commercial farms. Additionally, human power does not require fuel or machinery, making it a cost-effective option for small-scale farmers. Therefore, human power is the most flexible and adaptable source of farm power among the given options.
Swali 8 Ripoti
Capillarity is highest in
Maelezo ya Majibu
Capillarity is the ability of water to move upwards through soil against the force of gravity. The rate of capillarity in soil is influenced by the size of the soil particles. Smaller soil particles have greater surface area per unit volume, which increases the forces of attraction between the water and the soil particles, resulting in higher capillarity. Therefore, capillarity is highest in soil with smaller particles, such as clay. Thus, the correct answer is clay.
Swali 9 Ripoti
An important forage crop in West Africa is
Maelezo ya Majibu
The important forage crop in West Africa is giant star grass. Giant star grass is a highly productive perennial grass with high crude protein content and digestibility. It is an excellent forage crop for livestock and is commonly used in West Africa for grazing and cut-and-carry systems. It is also resistant to drought and can tolerate low soil fertility, making it a valuable crop for farmers in the region.
Swali 10 Ripoti
A maize farmer obtains a loan of N120,000.00 at an interest rate of 9% to be repaid in one year.Calculate the interest to be paid on the loan.
Maelezo ya Majibu
To calculate the interest on the loan, we use the formula: Interest = Principal x Rate x Time Where Principal is the amount borrowed, Rate is the interest rate, and Time is the duration of the loan. In this case, the Principal is N120,000.00, the Rate is 9% or 0.09 in decimal form, and the Time is one year. So, Interest = N120,000.00 x 0.09 x 1 Interest = N10,800.00 Therefore, the interest to be paid on the loan is N10,800.00. Option A is the correct answer.
Swali 11 Ripoti
Plant quarantine regulations are enforced to
Maelezo ya Majibu
Plant quarantine regulations are enforced to prevent the introduction of foreign pests and diseases. This is done to protect domestic crops and the environment from the harmful effects of invasive species that could cause economic and ecological damage. These regulations are put in place to ensure that plants and plant products that enter a country or region are free from pests and diseases, or are subjected to appropriate measures to control or eradicate any such pests and diseases. This helps to maintain the health and productivity of agricultural crops and preserves biodiversity.
Swali 12 Ripoti
When the government provides subsidies in agriculture,
Maelezo ya Majibu
When the government provides subsidies in agriculture, it means that the government is giving financial assistance to farmers in the form of reduced prices on farm inputs like fertilizers, seeds, and machinery. This is done to make farming more affordable for farmers and to encourage them to produce more crops. The aim is to increase agricultural productivity and output, which would, in turn, lead to more food being produced for the population. Therefore, option A "farm inputs are made available to farmers at reduced prices" is the correct answer.
Swali 13 Ripoti
Which of the following sources of water is least useful for irrigation purposes?
Maelezo ya Majibu
The source of water that is least useful for irrigation purposes is the sea. This is because seawater has high salinity levels which can damage crops and soil, making it unsuitable for irrigation. The high salt levels can cause the soil to become saline, making it difficult for crops to absorb water and nutrients, and eventually leading to crop failure. Therefore, while seawater can be used for other purposes such as desalination, it is not a suitable source of water for irrigation.
Swali 14 Ripoti
Farm animals are identified by the following methods except
Swali 15 Ripoti
The growing of both forest trees and arable crops simultaneously on the same piece of land is termed
Maelezo ya Majibu
The growing of both forest trees and arable crops simultaneously on the same piece of land is called the taungya system. This system involves planting forest trees on a piece of land, and then, during the early stages of forest growth, intercropping with annual crops. The crops help to shade the trees, control weeds and increase the fertility of the soil. As the trees grow and mature, they are thinned to create more light for the remaining trees, which eventually form a dense forest canopy. The taungya system is often used in tropical countries as a way to provide both food and timber resources while also conserving the environment.
Swali 16 Ripoti
The most appropriate farm implement for breaking up soil clod is the
Maelezo ya Majibu
Swali 17 Ripoti
Subsistence agriculture mainly involves
Maelezo ya Majibu
Subsistence agriculture involves the production of food crops and/or livestock for consumption by the farmer and their family. It is characterized by the use of traditional farming practices and low levels of technology and capital inputs. The main goal of subsistence agriculture is to provide food and other basic necessities for the family, rather than producing for sale or export. It typically relies heavily on family labour, with little or no mechanization. Subsistence agriculture is prevalent in many developing countries and in rural areas of developed countries.
Swali 18 Ripoti
High temperatures on livestock induces the following effects except
Swali 19 Ripoti
The major export crops produced in the West African sub-region include
Maelezo ya Majibu
Swali 20 Ripoti
The system of breeding that is practiced when N'dama cows are mated by muturu bulls is
Maelezo ya Majibu
When N'dama cows are mated by Muturu bulls, the system of breeding that is practiced is crossbreeding. Crossbreeding is the process of mating individuals from two different breeds or populations. In this case, N'dama cows and Muturu bulls belong to different breeds. Crossbreeding is usually done to produce offspring with desirable traits that are not present in the parent breeds. The offspring of crossbreeding are usually more vigorous and healthy than their parents, a phenomenon known as hybrid vigor or heterosis.
Swali 21 Ripoti
In which part of the alimentary canal of poultry is grit mostly found?
Maelezo ya Majibu
Grit is mostly found in the gizzard of poultry. The gizzard is a muscular part of the digestive tract of birds that is responsible for grinding and breaking down food. It contains small stones, or grit, which are swallowed by birds and help to mechanically break down the food as it passes through the gizzard. The proventriculus is a glandular stomach that secretes digestive enzymes, while the cloaca is the common opening through which waste products and eggs are expelled. The rectum is the final part of the digestive tract where feces are stored before being excreted.
Swali 22 Ripoti
On a curve for the law of diminishing returns, maximum output is obtained at the
Maelezo ya Majibu
Swali 23 Ripoti
Which of the following describes the effects of excessive nitrogen application on the growth of maize plants?
Maelezo ya Majibu
Excessive nitrogen application on maize plants can have different effects depending on the stage of growth and the level of nitrogen applied. However, in general, the most common effect is high vegetative growth with low yield. This is because excess nitrogen encourages the plant to produce more leaves and stems at the expense of grain production. This phenomenon is commonly known as "luxury consumption" and can lead to taller, bushier plants that have a reduced ability to produce grains. Therefore, while nitrogen is essential for plant growth and development, excessive application can lead to negative consequences for maize production.
Swali 24 Ripoti
mosaic disease affects
Maelezo ya Majibu
Mosaic disease affects cassava and tobacco. It is a viral disease that causes a mosaic-like pattern on the leaves of infected plants. The affected leaves usually become distorted, stunted and mottled with light and dark green patches. The virus is transmitted by insects, such as whiteflies and aphids, and also through the use of infected plant materials for propagation. The disease can cause significant yield losses in affected crops, and control measures such as the use of resistant varieties and insecticides are often recommended.
Swali 25 Ripoti
Weeds which produce light and numerous seeds are normally dispersed by
Maelezo ya Majibu
Weeds which produce light and numerous seeds are normally dispersed by wind. This is because the seeds of such weeds are lightweight and often come equipped with structures that help them be carried by the wind over long distances. As the wind blows, it carries the seeds away from the parent plant and disperses them in different locations, allowing the weed to spread and colonize new areas. This method of seed dispersal by wind is known as anemochory.
Swali 26 Ripoti
Which of the following is not a characteristic of pigs?
Maelezo ya Majibu
The correct answer is "unlimited ability to digest fibre". Pigs are known for their high feed conversion rate, fast growth rate, and high prolificacy. However, unlike ruminants like cows and sheep, pigs have a limited ability to digest fibre. This is because they have a simple stomach and lack the specialized microorganisms necessary to break down complex carbohydrates in fibrous materials like hay and straw. As a result, pigs require a diet that is high in energy and low in fibre to support their growth and production.
Swali 27 Ripoti
Which of the following symptoms indicate anthrax disease?
Maelezo ya Majibu
Sudden death without any visible sign of sickness is the symptom that indicates anthrax disease. Anthrax is a bacterial disease caused by Bacillus anthracis, which can affect both humans and animals. It is known to cause sudden death in animals without any visible signs of sickness, making it a dangerous disease that requires immediate attention. The other options listed are not typical symptoms of anthrax disease. Persistent coughing may be indicative of respiratory infections or diseases, abortion in the seventh month of gestation could be caused by several factors, and prolonged diarrhea may be a sign of gastrointestinal disorders.
Swali 28 Ripoti
A major problem of grains storage in the rain forest zone of West Africa is high
Maelezo ya Majibu
The major problem of grains storage in the rain forest zone of West Africa is high humidity. This is because the high humidity in the environment provides a suitable condition for microorganisms, insects, and pests to grow, thereby leading to spoilage of the grains. The moisture content in the grains also increases due to the high humidity, which can lead to germination and spoilage. Therefore, controlling the humidity level during storage is crucial to prevent spoilage and preserve the quality of the grains.
Swali 29 Ripoti
Agricultural extension programme
Maelezo ya Majibu
Agricultural extension programme promotes the practical application of useful agricultural information to farmers. It is a service that provides farmers with knowledge and skills to improve their agricultural practices and increase productivity. The goal of extension programs is to disseminate research-based information to farmers, helping them adopt new technologies, management practices, and marketing strategies. The programme aims to improve the standard of living of farmers by providing education and training that enhances their farming activities.
Swali 30 Ripoti
Which of the following sources of power supply to the farm is most unreliable?
Maelezo ya Majibu
The most unreliable source of power supply to the farm among the options listed is wind. This is because wind energy is highly dependent on weather conditions, and its supply can vary greatly from day to day or even hour to hour. Wind turbines can only generate electricity when there is sufficient wind speed, and if the wind is too strong, the turbines have to be shut down to avoid damage. In addition, wind power generation requires large initial investments and can be affected by issues such as noise pollution and bird mortality. On the other hand, electricity, animal, and machine power can be more reliable as they are not as affected by weather conditions and can be controlled more easily.
Swali 31 Ripoti
Which of the following practices may cause fish diseases in a pond?
Maelezo ya Majibu
Poor management may cause fish diseases in a pond. Poor management practices such as overfeeding, overcrowding, poor water quality management, lack of proper aeration and filtration systems, and improper use of chemicals can lead to stress in fish, making them more susceptible to diseases. The stress may weaken the immune system of the fish, making them more vulnerable to infections and diseases.
Swali 32 Ripoti
Parturition in farm animals marks the end of
Maelezo ya Majibu
Parturition in farm animals marks the end of gestation. Gestation refers to the period of pregnancy when the young one is developing inside the mother's womb. Parturition, also known as giving birth, is the process of expelling the young one from the mother's body at the end of gestation. Once the young one is born, the mother starts lactating, and a new cycle begins.
Swali 33 Ripoti
Selection and hybridization are all methods of animal
Maelezo ya Majibu
Selection and hybridization are methods of animal improvement. Animal improvement refers to the techniques or processes used to enhance the genetic makeup of livestock, such as selecting animals with desirable traits and breeding them together to produce offspring with even better characteristics. Selection involves choosing animals with desirable traits and breeding them to pass on those traits to their offspring, while hybridization involves crossing different breeds or species to produce offspring with the best characteristics of both parents. These methods help to improve the productivity, health, and quality of livestock, and can ultimately lead to increased profits for farmers.
Swali 34 Ripoti
Which of the following effects is not a consequence of 'introduction' in crop improvement? Introduced crops
Maelezo ya Majibu
The effect that is not a consequence of 'introduction' in crop improvement is "hampering the growth of local varieties." When a new crop is introduced, it may have various benefits, such as higher yield, improved quality, and faster maturity than local varieties. However, it does not necessarily mean that it will harm the growth of local varieties. In fact, sometimes the introduced crop can bring new genetic traits that can be crossed with the local variety to produce even better varieties. Therefore, the statement that "introduced crops hamper the growth of local varieties" is not a valid effect of crop introduction.
Swali 35 Ripoti
Nitrogen is taken up by plant roots in the form of
Maelezo ya Majibu
Nitrogen is an essential nutrient for plant growth and development. However, plants cannot directly use atmospheric nitrogen gas. Instead, they take up nitrogen through their roots in the form of nitrate ions (NO3-) or ammonium ions (NH4+). Nitrate ions are the most common form of nitrogen taken up by plants from the soil. They are formed through the oxidation of ammonium by soil bacteria, and can be easily absorbed by plant roots. Therefore, the correct answer to the question is "nitrate ion".
Swali 36 Ripoti
When soils are poorly drained,
Maelezo ya Majibu
When soils are poorly drained, the air content of the soil is reduced. Poorly drained soils are saturated with water which fills up the pores between the soil particles. As a result, the air content in the soil is reduced, leading to anaerobic conditions that can negatively affect plant growth. Oxygen is required for the respiration of roots and soil microorganisms, and without it, the rate of decomposition can be slowed down. Additionally, anaerobic conditions can lead to the production of toxic substances in the soil that can inhibit plant growth. Therefore, proper drainage is important for maintaining a healthy soil environment for plants to grow.
Swali 37 Ripoti
Farm accounts help the farmer to
Maelezo ya Majibu
Farm accounts are financial records of all the farm income, expenses, and profits. These records help the farmer to manage the farm as a business by tracking expenses and income, identifying areas of profitability and loss, and making informed decisions about production, marketing, and financial management. By keeping records, farmers can identify areas where costs can be reduced and profits increased, and can also make informed decisions on whether to expand or contract their farming operations. Furthermore, by tracking expenses, farmers can budget their resources effectively and adopt modern farming techniques that will maximize their profits.
Swali 39 Ripoti
The most important factor that limits agricultural production in West Africa is
Maelezo ya Majibu
The most important factor that limits agricultural production in West Africa is rainfall. This is because most of West Africa is located within the tropics and experiences a wet-dry climate. The rainy season is relatively short, lasting only a few months, while the dry season is long and severe. Therefore, farmers rely heavily on rainfall for crop production, and when there is insufficient rainfall, crop yield is greatly reduced, resulting in food insecurity. Additionally, unpredictable rainfall patterns, as a result of climate change, further exacerbate the problem of limited agricultural production in the region.
Swali 40 Ripoti
Sexual propagation involves the use of
Maelezo ya Majibu
Sexual propagation involves the use of seeds. In this method, plants are propagated through the union of male and female reproductive cells, resulting in the development of seeds. The seeds can be collected, stored and sown in order to grow new plants with similar characteristics to the parent plant. This method is commonly used for crops, vegetables, and fruit trees. Sexual propagation has the advantage of producing plants that are genetically diverse, which may increase their resistance to diseases and pests.
Swali 41 Ripoti
The primary purpose of establishing wildlife reserve is to
Maelezo ya Majibu
The primary purpose of establishing wildlife reserves is to prevent the extinction of wild animals. Wildlife reserves are established to protect wild animals and their habitats from human encroachment and exploitation. By designating an area as a wildlife reserve, it becomes illegal to hunt, capture, or kill animals within its boundaries, thus providing a safe space for them to thrive and reproduce. The reserves also allow scientists to study the behavior and ecology of different species, which can help in developing strategies for their conservation. Overall, wildlife reserves play a vital role in maintaining the biodiversity of our planet and ensuring that future generations can enjoy the beauty and diversity of our natural world.
Swali 42 Ripoti
Which of the following is an advantage of mechanization?
Maelezo ya Majibu
An advantage of mechanization is that it allows for the carrying out of many farm operations with ease. Mechanization involves using machines and equipment to perform tasks that were traditionally done by hand. With mechanization, farmers can cover more ground and complete tasks more quickly, efficiently, and accurately. This can increase productivity and reduce labor costs. Additionally, mechanization can also help to reduce the physical strain on farmers and farm workers, leading to improved working conditions.
Swali 43 Ripoti
Dried cassava should not exceed 50% of the total ration of pigs because
Maelezo ya Majibu
Swali 44 Ripoti
Animal power is usually used on the farm for
Maelezo ya Majibu
Animal power, which is the use of animals such as oxen, horses, or donkeys, is often used on the farm for ploughing. Ploughing is the process of turning over the soil to prepare it for planting, and animals can provide the necessary pulling power to operate a plough. While animal power can also be used for other activities such as harvesting, spraying, or planting, ploughing is often the most common use of animal power on the farm.
Swali 45 Ripoti
In the mass method of agricultural extension, information is passed to farmers through the following channels except
Maelezo ya Majibu
Swali 46 Ripoti
In a crop production enterprise, a fixed factor of production could be the
Maelezo ya Majibu
A fixed factor of production in a crop production enterprise refers to a factor that remains constant regardless of the level of output. In this context, the size of the land is an example of a fixed factor of production because it is a fixed resource that cannot be increased or decreased in the short run. For instance, a farmer cannot quickly acquire additional land to produce more crops within a season. As such, the farmer must plan and manage the available land effectively to optimize crop yield and returns on investment.
Swali 47 Ripoti
The most important reason for encouraging afforestation in the arid regions of West Africa is to
Maelezo ya Majibu
Encouraging afforestation in the arid regions of West Africa is most important to serve as windbreak. This is because the arid regions of West Africa experience strong winds, which can lead to soil erosion, damage to crops, and loss of topsoil nutrients. Afforestation, which involves planting trees and other vegetation, can help to break the force of the wind, reduce soil erosion, and help to retain soil moisture. The trees also provide shade, which can help to reduce the surface temperature of the soil and create a more suitable microclimate for plant growth. Additionally, the trees provide habitats for birds and other wildlife, which can help to maintain ecological balance in the area.
Swali 48 Ripoti
Which of the following crops requires shade in the early stages of its growth in the field?
Maelezo ya Majibu
The crop that requires shade in the early stages of its growth in the field is cocoa. Cocoa plants need to be grown in partial shade in the early years of growth, which helps them to establish well and protect them from the direct sun. As they mature, the shade can be gradually reduced until the plants are fully exposed to the sun. Coconut, banana, and cotton do not require shade during their early stages of growth.
Swali 49 Ripoti
In the process of recycling carbon in nature, carbondioxide is used by crops during
Maelezo ya Majibu
During the process of photosynthesis, plants take in carbon dioxide from the atmosphere and use it along with water and sunlight to produce glucose and oxygen. This process occurs in the chloroplasts of plant cells and is essential for the growth and development of plants. As a result of photosynthesis, carbon is fixed into organic molecules, which are used as a source of energy for the plant and other organisms that consume it. Therefore, the correct answer is photosynthesis.
Swali 50 Ripoti
Most agricultural policies do not benefit rural communities because
Maelezo ya Majibu
Swali 51 Ripoti
Foot and mouth disease is caused by a
Maelezo ya Majibu
Foot and mouth disease is caused by a virus. The virus can affect cloven-hoofed animals such as cattle, sheep, pigs, goats, and deer, and can cause fever and blister-like sores on the tongue, lips, and hooves. The disease can lead to decreased milk production in cows and weight loss, which can result in economic losses for farmers. It is highly contagious and can spread rapidly among livestock, making it a significant concern for animal health officials.
Swali 52 Ripoti
Which of the following groups of crops is widely frown in areas with high rainfall?
Maelezo ya Majibu
Swali 53 Ripoti
Farmers often find it difficult to obtain loans from banks for agricultural projects because they
Maelezo ya Majibu
Swali 54 Ripoti
Rabbits are kept in cages called
Maelezo ya Majibu
Rabbits are usually kept in special cages known as hutches. These hutches are made with wire mesh, wood, or plastic, and are designed to provide a comfortable and safe living environment for the rabbits. Hutches are raised off the ground to prevent predators from attacking the rabbits, and they also provide good ventilation to help regulate the temperature and humidity levels. Additionally, hutches are designed to allow for easy cleaning and maintenance, which helps to promote good health and hygiene for the rabbits.
Swali 55 Ripoti
The sugar is most commonly found in the blood of animals is
Maelezo ya Majibu
The sugar that is most commonly found in the blood of animals is glucose. Glucose is a monosaccharide, which is a type of carbohydrate that provides energy to cells. It is the primary source of energy for the brain, nervous system, and red blood cells. Glucose is produced during digestion of carbohydrates and is transported in the bloodstream to provide energy for various metabolic processes in the body. It is also stored in the liver and muscles as glycogen.
Swali 57 Ripoti
(a) (i) What is culling? (ii) Give three reasons why culling is practised in livestock management. (b) State three advantages and three disadvantages of each of the following management systems in poultry production: (i) deep litter system; (ii) battery cage system.
None
Maelezo ya Majibu
None
Swali 58 Ripoti
(a) Explain the term "marketing." (b) State five importance of marketing in agriculture. (c) Mention five marketing functions. (d) In which four ways can the marketing of agricultural produce be encouraged?
Maelezo ya Majibu
None
Swali 59 Ripoti
TEST OF PRACTICAL KNOWLEDGE QUESTION
(a) Which of specimens F, G, and H is the most common source of energy in livestock rations?
(b) Mention one ingredient in specimen I which has a laxative effect on farm animals.
(c) State three important feed ingredients in specimen I essential for bone and teeth formation in livestock.
(d) Name four types of specimen l and the class of poultry to which each type is fed.
(e) Name four farm animals that feed largely on specimen J.
(f) State four plant protein sources used in livestock feeds.
Maelezo ya Majibu
None
Swali 60 Ripoti
TEST OF PRACTICAL KNOWLEDGE QUESTION
(a) ldentify specimen E.
Specimen E;
(b) State four damages caused to crops by the specimen.
(c) Briefly describe its life cycle
(d)(i) Name the stage of development at which the specimen is most dangerous to crops.
(ii) Give one reason for your answer.
e) List three control measures of the specimen.
Maelezo ya Majibu
None
Swali 61 Ripoti
(a) State five effects. of each of the following practices on crop production: (1) irrigation; (ii) drainage. (b) List four methods of surface irrigation. (c) Give two main reasons why surface drainage is often necessary in crop production.
Maelezo ya Majibu
None
Swali 62 Ripoti
(a) Define the term "disease." (b) State the difference between resistance and susceptibility to diseases. (c) Enumerate four economic importance of animal disease. (d) List three factors which determine the degree of resistance of an animal to a disease. (e) Outline three conditions that may inactivate a pathogenic organism.
Maelezo ya Majibu
None
Swali 63 Ripoti
TEST OF PRACTICAL KNOWLEDGE QUESTION
(a) ldentify specimens B, C, and D.
Specimen B; Specimen C; Specimen D;
(b) Give two observable physical properties of each.
(C) State two main nutrients supplied by each of specimens B and ?.
(d) State two methods of application of specimen C on the field.
None
Maelezo ya Majibu
None
Swali 64 Ripoti
TEST OF PRACTICAL KNOWLEDGE QUESTION
Study carefully the experimental set-up labelled A and use it to answer questions (a) - (d)
(a) State the aim of the experimental set-up.
(b) Describe briefly the procedure for carrying out the experiment.
(c) Describe briefly your observation on the experimental set-up.
(d) Outline how the different soil particle sizes can be estimated.
None
Maelezo ya Majibu
None
Swali 65 Ripoti
(a) State three functions of nitrogen in crop plants. (b) Mention four effects of excess soil nitrogen and three effects of nitrogen deficiency on plants. (c) Apart from lightning, state three other ways by which nitrogen is added to the soil? (d) List six soil micro nutrients.
Swali 66 Ripoti
Explain the following terms used in agricultural production: (a) hired labour; (b) fixed capital; (c) working capital; (d) management.
