(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 supplied by each of specimens B and Ď.
(d) State two methods of application of specimen C on the field.
Explanation
a) Specimen B is NPK or compound fertilizer; Specimen C is wood ash and Specimen D is animal dung.
(b) The observable physical properties of the specimens are:
Specimen B = NPK Higroscopic;
- The specimen is hard to touch, i.e; it is solid and strong.
- It is granular in nature and
- It is grey in colour and odourless.
Specimen C wood ash;
- It is grey in colour.
- It is smooth and velvety to touch
- It is powdery in form
- It is dry and odourless.
Specimen D animal dung
- It is dark brown or black in colour
- lt has a bad odour.
- it is bulky in nature.
- It is always sticky and soft in a fresh form.
(c) The major nutrients supplied by the specimen are:
- Specimen B = N, - P, -K,
- Specimen D = N, -P, -K.
(d) The methods of applying specimen C on the field are:
- It can be spread on the farm before ploughing.
- It can be put in holes, before planting
- It can be placed at the base of plant stem
- It can be allowed to be in rows before ridging