(a) ldentify specimens B, C, and D. Specimen B; Specimen C; Specimen D; %% (b) Give two observable physical properties of each. (C) State two main nutrients...
Question 1 Report
(a) ldentify specimens B, C, and D.
| Specimen B; | Specimen C; | Specimen D; |
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(b) Give two observable physical properties of each.
(C) State two main nutrients supplied by each of specimens B and ?.
(d) State two methods of application of specimen C on the field.
Answer Details
(a) Identification of specimens
- Specimen B: NPK (compound) fertilizer.
- Specimen C: Wood ash.
- Specimen D: Animal dung (organic manure).
(b) Two observable physical properties of each
| Specimen | Property 1 | Property 2 |
|---|---|---|
| B (NPK fertilizer) | Hard, solid and granular; hygroscopic | Grey in colour and odourless |
| C (Wood ash) | Grey in colour, powdery and smooth (velvety) to touch | Dry and odourless |
| D (Animal dung) | Dark brown or black in colour and bulky | Has a bad odour; sticky and soft when fresh |
(c) Two main nutrients supplied by each of specimens B and D
- Specimen B (NPK fertilizer): supplies Nitrogen (N) and Phosphorus (P), together with Potassium (K).
- Specimen D (Animal dung): supplies Nitrogen (N) and Phosphorus (P), together with Potassium (K).
(d) Two methods of application of specimen C (wood ash) on the field
- It can be spread on the farm before ploughing, or worked into holes before planting.
- It can be placed at the base of the plant stem, or applied in rows before ridging.
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