we are giving cunseltancy for multi cropping system,dence cropping system mango garden sutable inter cropping for existing plantatiori. and new plantation . first initial investment then low maintenance high income more than you getting now. please send details what is the distance of your existing mango trees.how many trees in total  acer farm how much you are getting from the farm how much spendimg for farm per year ..your farm soil type .how much you can invest in farm initial. do you know how many mango plants accomodate one acer. i have a miracle no . .in this system 4 types of inter crop plants as inter crops for entire farm.maximum utilization.of land.please send details to 
ananyaagrotech@yahoo.co.in