Explanation

(a) ldentification of specimens:

• G - Earthworm;
• H - Millipede;
• I - Termite;
• J - Soldier ant.

(b) Factors that determine the population of specimen G in farmland include:

• organic matter,
• content of the soil,
• water-holding capacity of the soil,
• level of soil aeration/degree of porosity,
• presence of vegetative cover,
• soil pH acidity,
• soil temperature.

(c) Importance G and I in Agriculture are:

Specimen G -Earthworm :

• Earthworm helps in the decomposition of organic matter in the soil.
• It also helps in mixing soil mineral matter with organic matter and improves soil structure.
• It improves soil aeration.
• When it dies it adds organic matter to the soil.
• It increases the rate of water percolation of the soil by creating channels for water drainage.

Specímen I - Termite:

• helps in the decomposition of organic matter in the soil
• improves the soil structure or loosen the soil,
• improves soil aeration,
• shifts large amount of subsoil to the surface or forms termitarium which limits cultivable space,
• destroys crop-plants and wooden handles of farm tools,
• creates wounds that serve as entry points for disease pathogens on crop-plantS,
• destroys wooden handles of farm tools,
• destroys wooden farm structures,
• when it dies, it adds organic matter to the soil,
• increases the rate of water percolation.

(d) Control measures of specimen I:

• smoking or burning,
• use of insecticides,
• regular ploughing,
• digging up the termitarium to destroy the queen.

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