Explanation:

Macronutrients are divided into two groups: primary and secondary.

• The primary macronutrients are those that are needed in the highest concentration: nitrogen (N), phosphorus (P), and potassium (K).
• In fact, these three primary nutrients are needed in higher concentrations than the rest of the macronutrients combined. 
• An undesirable outcome of the Nutrient Based Subsidy (NBS) Scheme has been the change in fertilizer mix. As against the recommended Nitrogen (N): Phosphorous (P): Potassium (K) ratio of 4:2:1, the NPK ratio in 2013-14 was 8.2:3.2:1. 
• Secondary macronutrients are also required for sustained plant health, but in lower quantities than the primary macronutrients. Calcium (Ca), Magnesium (Mg), and Sulfur (S) comprise the secondary macronutrients.

Hence only statement 2nd is correct.