Mineral Nutrition Question 19
19. The major portion of the dry weight of plants comprises of
(a) Carbon, hydrogen and oxygen
(b) Nitrogen, phosphorus and potassium
(c) Calcium, magnesium and sulphur
(d) Carbon, nitrogen and hydrogen
Show Answer
Answer : a
Hints & Solution
(a) The major portion of the dry weight of plants comprises of carbon, hydrogen and oxygen. Dry weight $=$ Weight recorded after drying the plant or part of a plant at temperatures higher than the ambient air temperature (e.g., around 65 - 100 degrees $C$ ), to drive off the water.
