Dear shiv sir,ANUSHA FARMS, kindly arrange for 25 tractor loads of fertile soil prefarably red soil if available nearby if not get fertile black soil only from a nearby tank , arrange 3.5 ft x 3.5 ft beds of height 2 ft ( The above 25 tractors soil is sufficient for 1 acre beds of size 3.5 ft x 3.5 ft gap acts as a drain x 2 ft height beds) and plant areka nut at a distance of 8 ft on the bed length and in between the areka plants on bed, plant one banana plant. Totally they can be 780 areka plants and 780 banana plants. since the banana and areka loves water much they grow nicely and excess water will be drained through the gap drain between beds. Total 25/ 26 beds of length 240 ft will be in one acre. Both areka and banana active root system will be below 2 ft depth only and they grow well.Grow both the areka and banana organically.After few years you can go for pepper cultivation also on the beds. Respected Renuka madam, soils with stones do very well for plant growth due to good aeration to root system and respond well for organic fertilisers.Only bad with stone soil is you have to provide little more water.