For the vast majority of Indian farms, yes, a 45 HP tractor handles most jobs without being overworked. 

What a 45 HP tractor handles well:

• Trolleys for farm transport

• Rotavators up to about 5-6 feet

• Small to mid-size PTO irrigation pump operations

• Medium to slightly heavy soil, which is difficult to till

• Seed sowing, spraying and general cultivation activities

Where a 45 HP tractor may be lacking:

• Heavy equipment such as large disc harrows or subsoilers

• Soil that is very hard or rocky and needs to be deeply cultivated

• Large-scale commercial farms in need of high output and high-speed operation with a large area of land

On a 5-15 acre farm using relatively common crops such as wheat, cotton, vegetables, a 45 HP tractor model truly has most of your bases covered! It's also more fuel-efficient than jumping straight to 55-60 HP for jobs that don't actually require that much power. 

The only time you have to look higher is if you're doing heavy commercial farming, working with really tough soil, or running big implements regularly. Otherwise, 45 HP is a smart, balanced choice that most farmers across India rely on daily without any complaints.