1Even though Harkabahadur planted an improved variety of seed, why was his crop not good at first?
2Urea improved some of the crops in the field but not others. Why might that be?
3Why did urea, ammonium phosphate and potassium sulphate have to be used in different parts of the field?
4Why might Harkabahadur have used lime and calcium chloride in his field?
5What are essential elements? Name the 17 elements essential to plants.
6What is the difference between primary and secondary nutrients? Write with examples.
7Why is it important to have the soil tested before adding fertilizer? Answer from Harkabahadur's experience.
8What problems can appear in plants that are short of nutrients?