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Rice (Oryza sativa L.) is an important food and cash crop of Pakistan. It is also one of the main export items of the country. It accounts for 5.9 percent of value added in agriculture and 1.3 percent in GDP. Rice plays multifarious roles in the economy of Pakistan. Firstly, it is second staple food and contributes more than 2.0 million tones to our national food requirement. Secondly, rice industry is an important source of employment and income for rural people. Thirdly, it contributes in the country, s foreign exchange. Food security in Asia depends largely on irrigated rice. More than 75...