Topics in Agricultural ScienceImportance of forest: Forest reserves in Nigeria Wildlife reserves in Nigeria and its importance Prevention and Control of Crop Pests Economic Importance of Crop Pests Classification of Insect Pests and their Economic Importance Agricultural Machines and their Uses Soil Erosion: Causes of Soil Erosion Ways to prevent Soil Erosion Asexual Propagation in Plants, Types and Examples Differences between Gymnosperms and Angiosperms Scheme of Work, Agricultural Science, SS1, First Term Scheme of Work, Agricultural Science, SS1, Second Term Scheme of Work, Agricultural Science, SS1, Third Term Len Academy Agric Science exam questions, JSS1, First Term Len Academy Agric Science exam questions, JSS1, First Term, part 2 Definitions and Meanings of Agricutural terms (P - Q) Definition and Meanings of Agricultural Terms (P and Q) part 2 Len Academy questions for Agric Science JSS1, 2nd Term Len Academy questions for Agric Science JSS1, 2nd Term, Part 2 Roles of Government in Agriculture
Academic Questions in Agricultural Science
Cordage is made from _____ crop.
F. Vegetables and Spice
_____ is defined as the solid and arable part of the earth where agricultural activities are be carried out.
C. Agricultural land
E. Open land
F. Planting and grazing land
Gymnosperms and angiosperms are seed bearing plants under the division spermatophyta?
Which of the following is false concerning gymnosperms?
A. Cones are present
B. Sepals are present
C. Petals are absent
D. Only seeds are produced
E. Sporophyll form the cones
F. In seed formation, the ovules aren't present in the ovary
Which of the following statement is incorrect concerning seeds?
A. The ovary develops into the seed after fertilization
B. The embryo in the seed develops into a young plant
C. The seed's endosperm serve as a source of food reserve for the developing embryo
D. A seed has its own genotype
E. Seeds are products of sexual reproduction
F. Apomictic seeds aren't produced sexually and the hawkseed is an example
The _____ is the reproductive organ in plant's sexual reproduction.
A. Pollen grain
In flowering plants, fertilization occurs when the _____ comes into contact with the ova (as genetic materials are eventually exchanged).
F. Pollen grain
The fusion of sperm and ova in animals leads to the formation of _____.
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Mechanised farming is a system of farming whereby agricultural machines are utilized on farmlands. The use of agricultural machines greatly increases the farmer's output and productivity. For this reason, they are used on large farmlands; thus replacing the primitive simple farm tools.
Below are various agricultural machineries and their functions:
An tractor serves a variety of purposes. In agriculture, one of such purpose is to effectively pull or push other agricultural machineries like planters, rollers, plough, reaper, balers, mowers, combine harvester and so on.
They are also used for carrying or hauling different type of large materials from one point to another.
Irrigation sprinklers are also referred to as sprinklers or water sprinklers.
They are used to water large areas of farmland. They may also be used for controlling dust particles generated from various activities carried out on land.
They are pulled by tractors and help to cultivate the soil, preparing it for sowing. They do this by turning over the upper layer of the soil in order to expose fresh nutrients to its surface. Through this action, small plants, weeds and other particles present on the soil becomes buried, thus bringing about their eventual breakdown and decomposition.
A cultivator helps to efficiently mix the soil with organic fertilizers and other materials.
The cultivator is also used for the preparation of seedbed. It is able to carry out this function because it controls weeds and warms the soil on an agricultural land. Through this process, the planted crops are able to grow on the soil which now contains less weed, adequate water and more nutrients.
They are also driven by a tractor. The reaper helps to cut crops into a size of about 3-4 inches above ground level. The crops are then carried via its conveyor belt.
Note: A reaper is very useful for harvesting crops like cereals, grasses, oats and barley.
They are tractor driven and are used for tilling the soil. A subsoiler acts as a tillage machine that breaks up and loosens the soil. They prove to be useful in farmlands with compacted soils.
They are pulled by tractors and are used to level the soil by breaking large clumps of particles present on the surface of the soil.
They are commonly termed a set of harrows.
They perform a tillage function like the plough and subsoiler; but that of the harrows occur at the surface of the soil.
Functionally, a harrow breaks and level up the soil's surface.
Mowers are agricultural machines used mainly for cutting grass (and forage crops).
Due to the manner at which the grasses are cut, hay and silage becomes the end result of the cut grasses; after which they are placed into rows referred to as windrows.
A baler, also called a hay baler is used for compressing crops that had been cut or raked; for instance - silage, hay and flax straw. The baler aid in compacting the cut crops into bales so that they can be easily moved from one point to another. Also, the crops becomes easily stored when in bales.
The combine harvester is simply referred to as combine. It perfoms at least two functions.
First, it reaps (harvests) grain crops. Next, it threshes it, separating the grain kernels from their seed coverings and other chaff that may be present around it.
In summary, the major operations carried out by the combine harvester are reaping, threshing and winnowing.
A planter (usually towed behind a tractor) functions to plant or sow seeds in rows throughout the farmland.
The planter plants the seeds down the soil in a definite manner along rows at regular intervals.
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Amazing facts in Agricultural Science
Peanuts are legumes and not nuts
Although plants neither see nor hear, they can recognize their siblings and even give them preferential treatments
Squirrels do plant more trees (through their actions) than an average human in their lifetime. They often hide their acorns and nuts underground and forget about them
Cows have got the ability to walk up stairs, but not down stairs
A group of cows is called a team, drove or herd.
People just prefer to call them herd
NOTABLE POINTS IN Agricultural Science
Below are some common types of erosion:
Water Erosion: It is caused by rainfall and flooding on the topsoil. As a result of water erosion, some layers of the topsoil are lost.
Sheet Erosion: When an entire surface of land becomes eroded at a uniform (equal) level, such is referred to as sheet erosion. It is shown below:
Wind Erosion: It results from the actions of wind on a bare land. Wind erosion is often seen in deserts. Overgrazing and lack of vegetation cover will also enhance wind erosion on topsoil.
Soil erosion is defined as a process through which the topsoil is removed or moved from one point to another by agents like wind, water, man and animals.
Soil erosion occurs naturally (wind and water) and may also be facilitated by living organisms.
Soil erosion is more likely to occur on a sloppy land and land with no vegetation cover. When this occurs, the nutrient rich layer of the topsoil is washed away; and this ultimately results in fewer plants growing on such eroded soil.
There are about 630 different kinds of carnivorous plants.
Carnivorous plants are plants that derive some or most of their nutrients by consuming small animals, especially insects.
Carnivorous plants are also referred to as insectivorous plants.
Examples of carnivorous plants include sundew and Venus flytrap.