** Ioneer INR.AX jumps 8% to A$0.135, highest since April 4
** Lithium-boron producer enters agreement with Esmeralda County, Nevada, to provide public services and infrastructure upgrades
** Says deal expected to provide A$5 mln ($3.2 mln)-A$7 mln in County benefits
** Stock down 21.9% this year, as of last close
($1 = A$1.5883)
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))