The main nutrients present in fertilizers are nitrogen, phosphorus, and __________.
Assertion : The chief sinks for the mineral elements are the older regions of the plant.
Reason: Elements most readily mobilised are calcium, phosphorus, nitrogen and potassium.
Find the correct match of the columns.
Element supplied by fertilizer Example of fertilizers.
(i) Nitrogen (a) Super phosphate (ii) Phosphorus (b) Potash (iii) Potassium (c) Urea
Question 16 Which one of the following nutrients is not available in fertilizers? (a) Nitrogen (b) Phosphorus (c) Iron (d) Potassium