Question

Absorption of salts by different crops (Units: Kg/Hectares/Season)

Crop	Yield par hectare	Nitrogen	Phosphorus	Potassium
Rice	2,240	34	22	67
Wheat	15,68	56	22	67
Millet	1,792	56	15	146
corn	2,016	36	20	39
Sugarcane	67,200	90	17	202
Groundnut	1,904	78	22	45

 

Nutrient	Uses
Nitrogen	New leaves, flowers arise fast.
Phosphorous	Helps roots to penetrates deep into the soil to absorb nutrients quickly.
Potassium	Resistance towards pests, increases the quality of smell, colour and taste of fruits.

a) In which crop new leaves arise fast? Why? 

b) In which crop roots do not penetrate deep into soil? 

c) Which crop show more resistance to pests? Why? 

d) From the above table, cultivation of which crop yields more to farmer?

Answer 1

1. Sugarcane crop. Because it utilise nearly 90% of Nitrogen. Nitrogen is responsible for formation of new leaves. 

2. Millet crops. 

3. Sugarcane 

4. Sugarcane