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<br />POND 13-8 EC, Field <br /> <br />umhos~ <br />600 <br />500 <br />400 <br />300 <br />200 <br />100 <br />0 <br />^ MIN. <br />cm <br /> <br />^ MEAN <br />^ MAX. <br />~ s.:gatr~' r sartY ~ <br />1987 1986 1985 1984 1983 <br />