This book has been written based on the experiences of the author about the local farmer's knowledge on salinity problem, shrimp farming and the impact of shrimp farming on economy of local farmers and on the micro-environment of rice field in the coastal area of Bangladesh. Through this book the author tries to illustrate how the cropping systems have been changed from entirely rice based to boro rice and shrimp based. The comparative economic output from the two cropping systems namely aman rice-boro rice cropping system and shrimp-boro rice cropping system have been addressed. The book...