The PM-PRANAM scheme aims to:

The correct option is Reduce the use of chemical fertilizers by promoting alternatives.

Step-by-Step Explanation:

1. Understanding PM-PRANAM:
PM-PRANAM stands for PM Programme for Restoration, Awareness, Nourishment and Amelioration of Mother Earth.

2. Key Objective:
The main objective of this scheme is to incentivize States and Union Territories to promote the balanced and sustainable use of fertilizers, including alternative fertilizers such as organic, bio-, and nano-fertilizers, thereby reducing the overuse of chemical fertilizers.

3. Impact & Benefits:
- Reduces the chemical burden on soil and preserves soil health.
- Substantially reduces the government's financial subsidy burden on chemical fertilizers.
- Encourages sustainable agriculture and eco-friendly farming practices.

Therefore, the scheme directly aims to reduce the reliance on chemical fertilizers by encouraging alternative farming nutrients.