(a) List four factors that affect the type of soil... | WAEC SSCE - Agricultural Science - 2012 (Essay)

Question 1 Report

(a) List four factors that affect the type of soil formed at a place (2 marks)

(b) State: (i) two agricultural uses of land
(ii)a two non-agricultural uses of land. (4 marks)

(c) Sate two functions and two deficiency symptoms of each of the following nutrients in crops: (i) nitrogen; potassium. (8 marks) \

(d) Mention two ways in which soil structure Is important in agriculture. (2 marks)

Answer

Answer Details

(a) Four factors that affect the type of soil formed at a place [2 marks]

(b) Uses of land [4 marks]

(i) Two agricultural uses: for growing crops (crop cultivation) and for rearing/grazing livestock.
(ii) Two non-agricultural uses: for building houses and roads (construction) and for mining/industrial and recreational purposes.

(c) Functions and deficiency symptoms of the nutrients [8 marks]

Nutrient	Two functions	Two deficiency symptoms
Nitrogen	Promotes vegetative (leaf and stem) growth; forms part of proteins, chlorophyll and protoplasm.	Yellowing of leaves (chlorosis), starting from older leaves; stunted growth and poor yield.
Potassium	Strengthens stems and improves resistance to diseases; aids formation and translocation of carbohydrates and fruit/seed development.	Scorching/browning of leaf margins and tips; weak stalks with lodging and premature leaf fall.

(d) Two ways soil structure is important in agriculture [2 marks]

It determines soil aeration and drainage, which affect root respiration and water movement.
It influences root penetration, water-holding capacity and the ease of tillage of the soil.

(a) List four factors that affect the type of soil formed at a place (2 marks) (b) State: (i) two agricultural uses of land (ii)a two non-agricultural uses ...