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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Prevention of crop pest refers to the various steps taken to keep crops intact (when they are yet to be attacked by pests). They are therefore done to prevent pests from acting on crops and other agricultural produce.
The control of crop pest refers to the various actions taken by the farmer to minimize or stop the actions of pests (already acting) on agricultural produce.
Crop pests can be prevented and controlled through a variety of methods. These are:
This process involves the physical or mechanical removal of pest from an agricultural land via various techniques such as:
This method of pest control require the use of animals (or other organisms) that act as a natural enemy to pest. By nature, these animals enjoy eliminating pest. The animals used in biological control of pests typically act as a predator, parasitoid or pathogen to the appropriate pest.
Below are some examples of the biological control of pests:
Note: Any new method to be implemented in the biological control of pest must be carefully analysed and considered before they are released into the environment. This is done to prevent an attack on useful and other harmless organisms within the environment.
Chemical control of pest involves the use of toxic substances (chemicals) to eliminate pest within an environment. Such toxic substances or chemicals are generally referred to as pesticides. The pesticides can take different forms; (That is; they can exist in liquid, powdered, granular or gaseous forms).
In summary, chemical control of pest involves the use of:
Cultural control of pest is a method that requires the application of various farm practices to control pest. The application of these farm practices functions to interrupt the life cycle of the pest; thus significantly decreasing their proliferation on agricultural land.
The various farm practices that interrupts the life cycle of pests include:
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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.