This document provides an economic analysis of paddy-prawn farming over 120 days on 1 hectare of land with a stocking density of 30,000 prawn. It estimates the capital costs at Rs. 87,000 and variable costs at Rs. 99,650. Fixed costs are estimated at Rs. 40,998 including depreciation and interest. Total revenue from 4 tons of paddy and 720 kg of harvested prawn is estimated at Rs. 2,55,000, providing an estimated profit of Rs. 1,14,350.

2. Economics of Paddy
cum Prawn Farming

3. Assumptions :-
1 Water Spread area 1 Ha
2 Culture Period 120 days
3 Stocking density 3 nos/sq.m. 30,000 nos
4 Survival Rate 60% 18,000 nos
5 Average weight at harvest
Prawn 40gm
720 kg
6 Crops /Year 2
7 Paddy Seed 40 kg /ha

4. Capital Cost :-
1 Paddy – Pond Preparation 50,000 Rs
2 Construction of shade 5,000 Rs
3 Electricity operated pump 20,000 Rs
4 Harvesting net and other equipments 12,000 Rs
Total = 87,000 Rs

5. Variable cost :-
Sr.No. Particular Quantity Rate Expenditure
(Rs)
1 Bleaching Powder 250kg 15Rs/kg 3,750
2 Lime 500 kg 5Rs/kg 2500
3 Urea 500 kg 6Rs/kg 3000
4 SSp 600kg 7 Rs/kg 4200
5 Organic manure 10 ton 500Rs/Tonn 5000
6 Prawn Seed 30,000 nos 1 Rs/kg 30,000
7 Paddy seed 40kg 30 Rs/kg 1200
8 Supplementary feed
for Fish
500 kg 40Rs/kg 20,000
9 Labour Charges 1 2000/month 10,000
10 Harvesting 10,000
11 Electricity Charges 10,000
Total = 99,650 RS

6. Fixed Cost :-
1 Depreciation on Capital Cost 10 % 13,200 Rs
2 Interest on Capital cost 12% 15,840 Rs
3 Interest on Variable Cost 12% 11,958 Rs
Total 40,998 Rs
Total cost =Varible cost + Fixed Cost
=40,998 + 99,650
= 1,40,648 Rs

7. Revenue :-
1 Paddy 4 Tonn 16 Rs/kg 64000 Rs
2 Prawn 7200 Kg 250 Rs/kg 1,80,000Rs
Total = 2,55,000 Rs
Profit = Revenue – Total Cost
= 2,55,000 –1,40,648
= 1,14,350 Rs