Agricultural Science

Agriculture Terms - Definitions and Meanings of Agricutural Terms (P - Q)

len Alfred Ajibola - Sat, 22nd June, 2019 @ 15:19

Topics in Agricultural Science

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 Agriculture Terms - Definitions and Meanings of Agricutural Terms (P - Q) Agricultural Terms: 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 Agricultural pest and Crops attacked Agriculture Terms - Definitions and Meanings of Agricutural Terms (I - O)

Academic Questions in Agricultural Science

Please check out our Test Your Knowledge page to see all Questions and Answers

Which of the following is an example of oil crop?

  • A. Melon

  • B. Rubber

  • C. Flax

  • D. Moringa

  • E. Ginger

  • F. Coffee

Concerning crops and plants, which of the following statement is incorrect?

  • A. All plants are not crops

  • B. All crops are plants

  • C. Cactus can be a crop

  • D. Corpse flower is not a plant

  • E. Venus flytrap is not a crop

  • F. All the options are correct

Which of the following is not a problem associated with agriculture?

  • A. Superfluous research facilities

  • B. Poor road network

  • C. Illiteracy

  • D. Lack of storage facilities

  • E. Limited mechanized farming

  • F. Bad government policies

Mallet - Len Academy

The above image is a _____.

  • A. Hammer

  • B. Crowbar

  • C. Shear

  • D. Secateur

  • E. Bolo

  • F. Mallet

Cutlass - Len Academy

The agricultural tool shown in the image (above) is used for the followings except _____.

  • A. For cutting tree branches, weeds, and other plant materials in farmland

  • B. To remove dirts from the top soil

  • C. For harvesting crops like sugarcane

  • D. To clear bushes

  • E. For planting crops like melon

  • F. To dig superficial holes for the planting of seeds

Which of the following statement is false concerning soil erosion?

  • A. The top soil is moved from one point to another

  • B. Man is an agent that bring about soil erosion

  • C. Wind and water are natural agents of soil erosion

  • D. Sheet erosion is said to occur when the surface of a land is eroded at an unequal levels

  • E. Deforestation will increase the likehood of wind erosion

  • F. Rill erosion results in the formation of miniature dongas on land

Gully erosion - Len Academy

The above diagram shows a _____ erosion.

  • A. Wind

  • B. Sheet

  • C. Rill

  • D. Gully

  • E. Landslide

  • F. Crooked

An instance of farming whereby a farmer uses animal and green manure as fertilizers in place of chemicals like NPK is termed _____.

  • A. Reformative farming

  • B. Alternative farming

  • C. Crude farming

  • D. Retrogressive farming

  • E. Non-Chemical farming

  • F. Agro-farming



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Agricultural Terms and Definitions:

As a student, having the knowledge of various agricultural terms will enhance your understanding of agricultural science.

In this article we will look at agricultural terms beginning with letters “P” and “Q”.


  • Parasite Load

This is the total number of parasites that are present in a host organism.


  • Parasite

A parasite is any organism that lives on another organism (called the host), feed on it, benefit at its expense and eventually causes harm to it.

An example of a parasite is Plasmodium malariae whose hosts are humans.

Plasmodium (malaria parasite) is responsible for causing malaria in humans.

Note: Plasmodium is a protist (and a protozoan).

Please read more on the Characteristics of Protists here.


  • Parenchyma

The parenchyma is a plant supporting tissue composed of cells with simple pits. They also help plants to metabolize and store their food materials.

The two types of parenchyma cells recognized in plants are:

  1. Axial parenchyma: The cells are seen in vertical positions.
  2. Ray parenchyma: The cells lie in horizontal positions.


  • Parturition

This is the process whereby an animal gives birth to one or more offspring.


  • Pasteurization

This is the process of preserving milk by passing it through a mild temperature (usually less than 100oC) in order to kill all harmful bacteria; without changing the physical and chemical composition of the milk.

Other products that can be preserved through pasteurization include yogurt, cheese, beer and wine.


  • Pastoralism

This is when a person or group of people go about their lives by raising and herding livestock such as cattle, sheep and goats.


  • Pastures

This is an area of land used for forage and grass production on which farm animals like cattle, sheep and goats graze on.

Note: The savanna is also referred to as a grassland.

Please read more on the Savanna with its Characteristics here.


  • Peat

A peat is formed when vegetative materials are allowed to decompose partially into organic matter under wet conditions.


  • Peat Soils

These are soils that are formed from dead and partially decayed organic matter in a wet land.


  • Peatland

This is a general term used on an extensive area of wetland where peat has been formed.


  • Permanent Wilting Point

A plant is said to have reached the permanent wilting point when it has lost so much water to the extent that even when it’s put in a humid environment with enough watering, it will still not be able to recover.



  • Pest

A pest is any organism that attack plants and plant products, causing damage and illness in the process.

Please read on Agricultural Pest and the Crops they attack here.


  • Pesticides

These are chemicals or substances used for preventing, repelling and destroying pest on an agricultural land.

Please read on Pest of Agricultural Importance and their Control here.


  • pH

This is the degree of acidity or alkalinity.

A soil that has a pH of 0 – 6.9 is said to be acidic.

A pH value of 7 is neutral.

pH with values 7.1 – 14 is considered to be alkaline.

The ideal pH of a soil for the optimum growth of most agricultural crops is between the values of 6 to 7.5.


  • Photosynthesis

This is the process through which green plants manufacture sugars by utilizing carbon(IV)oxide (CO2) and water (H2O) in the presence of sunlight; as oxygen is given off as a by-product.

Photosynthesis usually occurs in the green leaf of plants. It may also occur in the plant’s stem.

The chlorophyll present in the chloroplast of plant’s leaf traps the needed sunlight energy for photosynthesis.

Please read on Autotrophic Nutrition and Photosynthesis here.


  • Phytoplankton

These are large communities of tiny or microscopic aquatic organisms (comprising of photosynthetic bacteria, algae, dinoflagellates, diatoms, plants and plant-like protists) living on water.

It may interest you to know that more than 60% of earth’s oxygen comes from the photosynthetic activities of phytoplanktons.

Please read on various Interesting Facts for Students here.


  • Pistil

This is the female part of a flower comprising of the ovary, stigma and style.

Note: The flower is the reproductive part of a plant.

Please read on Sexual and Asexual Reproduction in Plants here.


  • Pith

These are group of parenchyma like cells with intercellular spaces; and are located inner to the plant’s vascular tissues (xylem and phloem), occupying the central region.


  • Pig

A pig is a young swine that weighs less than 54.4 kilogram.


  • Plant Available Water

This is the amount of soil water that can be absorbed by plant roots.

Please read on Soil Erosion here.


  • Plant Gums

This is an overall term for the viscous and adhesive plant substances that are usually produced as exudates from the bark of trees and shrubs.

Plant gums are sugars in nature. Examples of gums are pine and spruce gum.

Please read on Carbohydrates and Sugars here.

Please Read on Agricultural Terms and Meanings (Letters P - Q) part 2 here.

Please read on Agricultural Terms and Meanings, (Letter "A") here.

Read on Agricultural Terms and Meanings, letters I - O here.

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.

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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.

    Sheet Erosion - Len Academy

  • 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.

​​​Please read more on types of soil erosion here.

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.

Please read more on soil erosion here

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.

Some example of carnivorous plants include sundew and Venus flytrap.

Please read more on Carnivorous Plants here