Dear respected Thaya,
In paddy growing areas, where abundant water availability through out the year is available, now some of the farmers are doing mixed cropping. Glad to inform you that they are successful.
Details of my personal observation is as detailed below.
In the extent of their land, say 5 acres , they are digging pond of depth 3 ft in 2 acres and pouring the dug mud on the another 2 acres and some around the pond as bund to a height of 2 ft and 8 ft width.
With this, the 2 acres pond depth will be 5 ft and the another 2 acres height will be around 2 ft than the existing land level. Remaining 1acre level will be same.
In the elevated land they are growing vegetables, flowers etc, by using the water in the pond. In the pond they are doing fish/prawn(shrimp) culture. In the remaining 1 acre water they are growing paddy with the drain water from the pond.
Fish like Carp, silavathi(Rohu), Sea bass , etc will be grown at a density of 4 thousand per acre in extensive way and more fish in semi intensive way with Aerators. The fish will reach 1 to 2 KGS in 8 to 12 months, basing on the size of fish seedlings introduced.
Fish fcr will be around 1:2 and fish feed cost will be around rs 15/_ ( own made) to rs 23/_ floating feed.
Corp,Rohu are fetching around 60/_ to 110/rupees per kg basing on the harvest size and sea bass is fetching around rs 300/ plus per kg.
Paddy is giving regular yield and you can have 2 crops in a year. Vegetables/flowers can be grown through the year.
Pl note that above can be, if you are a full time farmer. Hope this may suit you.
With best wishes, g.p.Rao, farmer