Paddy & Fodder in Rubber Plantation


We had around 5 acres of rubber plantation and around two months back we have removed all the trees. Now we intend to convert part of the land for growing paddy (originally it was paddy land) and also for growing fodder and vegetables. Just wanted to know what would be be the best way to get this land to its original state? Would not uprooting the rubber roots affect the fodder production (someone said rubber roots apparently have lot of phosphorus)? And what could be the best trees around the farm?
The land is currently in three parts like a upper, middle and lower portion. Water is not much of a problem considering we are right next to a forested hill range and a stream flows though our land. Also there are couple of wells and a big pond.