If a soil exam shows a deficiency, use P and K doses. In order to use DAP, use Urea @ 100kg / acre, DAP @ 27kg / acre and MOP @ 20kg / acre. Use 1/3 dose of nitrogen and a complete dose of P and K prior to the final puddling.The application of more than 480 kg ha?one could also enhance the grain dry weight. From your correlation concerning NPK fert