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<br />R,L <br /> <br />Vr; <br /> <br />pH range during summer <br />growing season. <br /> <br />A) 6.5-8.5 <br />B) 5.0-6.5 or 8.5-9.0 <br />C) 4.0-5.0 or 9.0-10.0 <br />D) < 4.0 or > 10.0 <br /> <br />>< 0.8 <br />OJ <br />"0 <br />C <br />- 0.6 <br />~ <br /> <br />.,- <br />;,: 0.4 <br />.D <br />"' <br />~ 0..2 <br />:::s <br />Vl <br /> <br />1.0 <br /> <br /> I <br /> - <br />. .. <br />.. <br /> <br />0.0 <br /> <br />A <br /> <br />B <br /> <br />C <br /> <br />o <br /> <br /> <br />