Abstract
The production potential and economics of rice-based cropping sequences for coastal plains of Kerala were investigated as part of the ongoing All India Co-ordinated Research Project on Integrated Farming Systems (ICAR) being implemented in the Integrated Farming System Research Station (IFSRS) of Kerala Agricultural University located at Karamana, Thiruvananthapuram, during Kharif, Rabi and summer seasons of 2019-2020. The experiment was laid out in a randomized block design with eleven treatments i.e., CS1 : rice - fallow - fallow, CS2 : rice - rice - fallow, CS3 : rice - dhaincha - cowpea, CS4 : (rice + dhaincha) - rice - green gram, CS5 : rice - cassava - amaranthus, CS6 : rice - cassava - cowpea, CS7 : rice - para grass - fodder cowpea, CS8 : rice - fodder cowpea - fodder maize, CS9 : rice - okra - culinary melon, CS10 : rice - okra - yard long bean and CS11 : rice - rice - amaranthus, all replicated thrice. Among the cropping sequences, the productivity in terms of rice equivalent yield (28.93 t ha-1) and system productivity (0.079 t ha-1 day-1) was highest for CS10 : rice - okra - yard long bean. The maximum gross returns (`Rs. 901865 ha-1) and net returns (`Rs. 545705 ha-1) were also found to be highest for CS10 : rice - okra - yard long bean. However, B: C ratio was highest for CS9 : rice - okra - culinary melon (2.64) followed by CS10 : rice - okra - yard long bean (2.53).
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