Concept:The fertiliser label is an
NPK analysis, and its numbers show the percentages of nitrogen, phosphorus, and potassium present.
Explanation:The label
10−5−15 is read in the order
N,
P,
K.
Therefore, the fertiliser contains
10% nitrogen,
5% phosphorus, and
15% potassium.
Sulphur is not listed on the label, so it is not one of the major nutrients shown in the analysis.
Among the three listed nutrients, phosphorus has the smallest proportion:
5% is less than both
10% and
15%.
So the nutrient present in the least amount in this fertiliser bag is phosphorus.
Answer:C. phosphorus