If you want study income on the 0.50 acre land take up plantation of Taiwan Guava , you will be getting study income , 320 plants can be accommodated (high density) , provide drip system, at least 5 tons of guava fruits can be harvested which will fetch 1.50 Lakhs , expenditure is 0.50 Lakhs , you will get Rs.1.00 Lakhs profit. No other type herbal plant will fetch income on a small plot for which there may not be any demand.