Agricultural Science Lesson Notes

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Principles of Demand and Supply

<h1>PRINCIPLES OF DEMAND AND SUPPLY</h1> CONTENT <ol> <li>Meaning of Demand and Law of Demand</li> <li>The Demand Schedule and Demand Curve</li> <li>Factors Affecting the Demand for Agricultural Produce</li> <li>Movement along the Demand Curve</li> <li>Shift in Demand Curve</li> <li>Elasticity of Demand</li> <li>Meaning of Supply and Law of Supply</li> <li>The Supply Schedule and Supply Curve</li> <li>Factors Affecting the Supply of Agricultural Produce</li> <li>Elasticity of Supply</li> <li>Price Determination</li> </ol>   <h2>Meaning of Demand</h2> Demand can be defined as the quantity of a commodity that an individual is willing and able to buy at a specific price within a given period of time. Demand is more than the desire to have something. It must be backed with the ability to pay the price.   <h2>The Law of Demand</h2> This law states that there is inverse relationship between the price and the quantity of produce demanded. It therefore means that the higher the price the lower the quantity demanded.   <h2>The Demand Schedule</h2> Makes the law of demand explicit. It shows the relationship between the price and the quantity of the commodity demanded. Demand schedule shows the amount of a commodity that a person will buy at various prices in a given period.

Marketing of Agricultural Produce in Nigeria

<h1>MARKETING OF AGRICULTURAL PRODUCE IN NIGERIA</h1> CONTENT <ol> <li>Marketing Functions</li> <li>Marketing of Export Crops</li> <li>Importance of Exporting Agricultural Produce</li> <li>Measures taken by Government to Promote Exportation of Crops and Livestock Products in Nigeria</li> <li>Steps Involved in Exporting Agricultural Produce</li> <li>Corporate Bodies, Cooperative Societies and Individuals Engaged in Exporting Agricultural Products</li> <li>Problems of Agricultural Marketing</li> </ol>   <h2>Marketing Functions</h2> Marketing functions are the activities of the various marketing agents on the farm produce to be offered for sale. They are otherwise known as marketing functions and services carried out before the produce reaches the final consumer. These marketing functions are; (i)<strong> Farm-level Processing: </strong>This is the immediate processing of farm produce after harvesting in readiness for market. For example, cocoa processing, drying of farm produce and cleaning of farm produce. (ii)<strong> Grading or Sorting: </strong>This is the grouping of farm produce into various sizes, weights and quality for easy handling. (iii)<strong> Packaging: </strong>This is the loading of farm produce into various packs and labeling of the graded commodities. It can be describe as the technology of enclosing or protecting products for distribution, storage, sales and use. Packaging contains, protects, informs and sells the product. (iv)<strong> Storage or warehousing: </strong>This is the keeping of the farm produce in a store for a period of time before sales or export. (v)<strong> Transportation: </strong>This is the movement of produce from one location to another; that is from the store house to the market or port for exports.

Classification of Crops based on Source of Food Nutrients

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<h1><strong>CLASSIFICATION OF CROPS BASED ON SOURCE OF FOOD NUTRIENTS</strong></h1> CONTENT <ol> <li>Classification based on Sources of Food Nutrients e.g. carbohydrates, protein, fat and oil, minerals, vitamins, etc</li> </ol> <h2><strong>Sources of Food Nutrients</strong></h2> Crops can also be grouped based on the class of nutrient derived from them. <strong>Table showing classification of crops based on nutrients, their sources and functions </strong>

Description of the Damage Done by Pests

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<h1><strong>DESCRIPTION OF THE DAMAGE DONE BY PESTS</strong></h1> CONTENT <ol> <li>Description of the Damage Done by Pests</li> <li>Table Showing the Description of Damage Done by Crop Pests</li> </ol>   <h2><strong>Description of the Damage Done by Pests</strong></h2> Crop pests do a lot of damage to crops either on the farm or in the store. The damages done by pests include: (i) Some insect pests are carriers of diseases which they transmit to healthy plants. Examples of diseases transmitted by insect are: ground nut rosette, cassava mosaic, swollen shoot of cocoa, etc. (ii) Mammals (rodents) e.g. rats, grass-cutter eat up the tubers of yam, cassava and potato.

Animal Feeds and Feeding (continued)

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<h1><strong>ANIMAL FEEDS AND FEEDING</strong></h1> CONTENT <ol> <li>Meaning of Ration</li> <li>Types of Ration</li> <li>Meaning, Causes and Symptoms of Malnutrition</li> <li>Factors that Affect Feed Requirements of Farm Animals</li> <li>Reasons for Feeding Farm Animals</li> <li>Equipment Used for Feeding Farm Animals</li> </ol>   <h2><strong>Meaning of Ration</strong></h2> Ration is the quantity or amount of feed given to farm animals daily or over a period of 24 hours. The type of ration given to a particular farm animal is largely dependent on the purpose of production. A balanced ration is a ration containing all the nutrients in the right proportion for growth and development. <br> <h2><strong>Types of Ration</strong></h2> <ol> <li>Maintenance ration</li> <li>Production ration</li> </ol> <h3>1.<strong> Maintenance Ration</strong></h3> This is the amount of feed given to an animal to prevent an increase or decrease in the life weight of the animal. It is given to maintain a particular weight, shape and size.

Types of Farm Records and their Uses

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<h1><strong>TYPES OF FARM RECORDS AND THEIR USES</strong></h1> CONTENT <ol> <li>Types of Farm Records and their Uses</li> </ol>   <h2><strong>Types of Farm Records and their Uses</strong></h2> The farm records which a good farmer should keep include: Farm diary, Farm inventory, Input records, Production records, Consumption records, Sales records, Payroll or Labour record, Profit and loss account <h3>1.<strong> Farm diary</strong></h3> A farm diary is a record of the daily activities carried out on the farm. A typical farm record shows type of work done, date, the number of workers, time spent, observations and others. It serves as a good reference book to obtain information about the farm.

Factors Affecting Land Availability for Agricultural Purposes

<h2>FACTORS AFFECTING LAND AVAILABILITY FOR AGRICULTURAL PURPOSES</h2> CONTENT <ol> <li>Factors Affecting Land Availability and Uses</li> </ol> <br> <h2><strong>Factors Affecting Land Availability and Uses</strong></h2> Many factor affect land availability and uses in Nigeria. Some of these are; <ol> <li>Land tenure system</li> <li>Population pressure</li> <li>The size of useful land in the country</li> <li>Climatic factors</li> <li>Soil factors</li> <li>Cultivation practices</li> <li>Cultural practices</li> <li>Topography</li> <li>Government policy</li> <li>Religious beliefs</li> <li>Environmental pollution</li> </ol>   <h3>(i)<strong> Land tenure system</strong></h3> Land tenure is the system of land ownership including the rights and obligations governing its acquisition and disposal. The prevailing system of land ownership in Nigeria does not encourage prospective farmers to acquire large hectares of land because the actual owners feel that their young ones are being robbed o f their inheritance.In Nigeria, land is mostly acquired through inheritance and shared among the beneficiaries ,due to fragmentation of land it becomes difficult to carryout large scale farming. Similarly communal land tenure does not make land available for agriculture too. Land is jointly owned by community. At times, government holds such land in trust for the community and later releases such land for building industrial layout ,thus making lands unavailable for agricultural activities. <h3>(ii)<strong> Population Pressure </strong></h3>

Husbandry of Selected Crops (continued)

<h1>HUSBANDRY OF SELECTED CROPS</h1> CONTENT <ol> <li>Vegetables - Tomato</li> <li>Beverages - Cocoa</li> <li>Oil - Oil Palm</li> </ol>   <h2>Tomato: <em>Lycopersicon esculentum</em></h2> <h3>Description of Tomato</h3> This is an annual vegetable crop grown for its fruits. The plant has a weak hairy and triangular stem which bears side branches. It has compound leaves, borne alternately on the stem and branches. Tomato bears yellow flowers; the fruit are green and turn red, pink or yellow when ripe. The fruit can be eaten raw/ cooked, used for soup or stew preparation, or in preparing vegetable salad and other food. <h3>Varieties of Tomato</h3> Cultivated varieties of tomato are Roma, Bonny best, Hot set, Ife plum, Romita, money-maker, pork, and local cultivars. <h3>Land Preparation for Tomato Cultivation</h3> Land clearing is done manually with cutlass, ridges is made with hoe, or can be prepared by ploughing, harrowing and ridging. <h3>Method of Propagation</h3> Propagation is by seed planted either directly or first in nursery and later transfer to the field. The planting could be by drilling or broadcasting. <h3>Soil Requirement</h3> It does best in a rich drained loamy soil. <h3>Climate</h3> Tomato is a warm season crop and does best under dry condition. Annual rainfall is 750mm. Temperature is between 20ºC to 25ºC. <h3>Planting Date</h3> Early September to October <h3>Seed Rate</h3> 5-10kg of seeds/ha <h3>Nursery Practices</h3> It is done on ground, beds or seed boxes. Seeds are sown in drill 5cm apart and 2.5cm deep Shading, mulching, weeding and watering are done. Nursery last for 3 weeks when the plants are at three leaved stage <h3>Spacing</h3> <ul> <li>60cm × 60cm without staking</li> <li>50cm × 30cm with staking</li> </ul> <h3>Transplanting</h3> Transplanting is done after the seedlings have reached about 15-20cm tall. This is about 25-30days. The plants should have attained up to 4-5 leaves stage before transplanting to the field. Planting in the field is 45-60cm between rows and 30-45cm between plants. Transplanting should done in the evening or during cool weather together with the ‘ball of earth’ to ensure survival of the seedlings. <h3>Cultural Practices</h3> <ol> <li>Weeding</li> <li>Watering (this should be done immediately after transplanting morning and evening)</li> <li>Fertilizer application: NPK 15:15:15 and organic manure are necessary</li> <li>Staking: this is to enable plants stand erect and prevent lodging. It also allows for good fruiting and keep fruit from disease attack arising from contact with soil.</li> </ol> <h3>Harvesting, Processing and Storage</h3> Tomato matures between 2-4 months after planting (from transplanting). Harvesting is done by hand picking and it starts as from two months. For a short period, tomato can be stored in a refrigerator or spread on the floor in an airy room. For a long term storage, tomatoes are turned into paste and canned <h3>Pests of Tomato</h3>

Implications of Demand and Supply for Agricultural Production

<h1>IMPLICATIONS OF DEMAND AND SUPPLY FOR AGRICULTURAL PRODUCTION</h1> CONTENT <ol> <li>Implications of Demand and Supply for Agricultural Production</li> <li>Price Support and its Effects on Agriculture</li> <li>Price Control and Effects on Agriculture</li> <li>Subsidy and its Effects on Agriculture</li> <li>Reasons for Farm Subsidies</li> </ol>   <h2>Implications of Demand and Supply for Agricultural Production</h2> The implications of demand and supply for agricultural production include the following: <ol> <li>When the demand for a farm produce exceeds supply, price tends to rise.</li> <li>When the demand for a farm produce is lower than the supply, the price falls.</li> <li>Increase in the income of the consumer will make them demand for more farm produce vice versa.</li> <li>Increase in the price of produce may lead to low demand for it and shift to the close substitute that has a lower price.</li> <li>High cost of production may lead to low output, low supply and high prices of produce and vice versa.</li> <li>Supply of farm produce will be low when environmental factors for production are unfavorable and vice versa.</li> <li>High cost of farm inputs may lead to low supply and high cost of farm produce and vice versa.</li> <li>If the taste of consumers is in favor of a product, the demand and price of such produce will increase and vice versa.</li> <li>Increase in the number of producers will lead to increase in supply and reduction of price and vice versa.</li> </ol>   <h2>Price Support and its Effects on Agriculture</h2> Price support is the government imposed price floors on selected farm produce. It is also known as ‘minimum prices’ established by the government above equilibrium price. The government supports in the following ways:

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