a)(i) Give two examples of each of specimens A and B. (2 marks)

(ii) State three advantages of the application of specimen Ain crop production. (3 marks)

(iii) Mention two methods of applying specimen B in crop production. (2 marks)

 

(b) An experiment was conducted to determine the percentage of water in soil samples C and D.
The results are as shown in the table below:

	Soil Sample
Data Recorded	C           D
Mass of crucible	80g        80g
Mass of crucible and fresh soil	100g       140g
Mass of crucible and soil after heating	95g          100g

(i) Determine the mass of fresh soil for each of soil samples C and D (2 marks)

(ii) Determine the mass of water contained in each of soil samples C and D. (2 marks)

(ii) Calculate the percentage of water in each of soil samples C and D. (2 marks)

(c) What type of relationship exists between the amount of water and the amount of air in soils? (2 marks)