Explanation

(a) ldentification of Specimens;

• L - urea,
• N - lime / quicklime / slaked lime,
• Q - wood ash.

(b) Agricultural uses of specimen N (Lime):

• Lime is used in the soil to correct soil acidity.
• It helps to supply calcium for root development.
• It can be used to lime fish ponds to correct water acidity.
• It can be used in improving clay soil structure.
• It brings about flocculation of fine clay particles in fish ponds as well as reducing turbidity of ponds.
• It improves the growth of soil microbes and also renders more available the nutrients locked in clay soils.

Agricultural uses of specimen a (Wood ash)

• is used for correcting soil acidity.
• It is also a good natural pesticide for controlling insect pests of seedlings and vegetables;
• it provides potassium for plant growth and a good component of compost; lime increases grown of phytoplankton in fish ponds and can be used to correct acidity in fish ponds.

(c) Crops that requires Specimen L (Urea) are as follows:

• Maize;
• Millet;
• Rice;
• Guinea corn;
• Wheat:
• Leafy vegetables.

Crops that requires Specimen N

• groundnut:
• pigeon peas;
• cowpea,
• soyabeans;
• bambará groundnut.

Crops that requires Specimen Q (Wood ash) are as follows:

• cassava,
• cocoyams
• sweet potato;
• Irish potato;
• yams;
• carrots.

Methods of applying specimen L(Urea) to the soil are as follows:-

• Urea can be applied through ploughing into the soil using a plough, and it can be done through drilling into the soil using a plough.
• Ring method and covering can be used as a way of applying urea to the soil;
• Also, side dressing and covering methods can also be used.;
• Broadcast method can equally be applied.

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