 
 <translate> Each tree produces 60 * .5 = 30 more lemons than normal. So they each produce 60 + 30 = 90 lemons. He has 50 * 30 = 1500 trees. So every year he produces 1500 * 90 = 135000 lemons. That means he produces 135000 * 5 = 675,000.
Thus, the answer is 675000. <hau> Kowane itace yana ba da lemun tsami 60 *.5 = 30 fiye da yadda aka saba. Saboda haka kowannensu ya samar da lemun tsami 60+30=90. Yana da 50 * 30 = 1500 bishiyoyi. Don haka a kowace shekara yana samar da lemun tsami 1500 * 90 = 135000. Wannan yana nufin ya samar da 135000 * 5 = 675,000. Saboda haka, amsar ita ce 675000. 