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<br />c.J <br />M <br />en <br />N <br />CJ <br />o <br /> <br /> <br />Fortunately, we have answers the ancients <br />did not, Our technology, that has led us to dig <br />ditches and spread water over the land and <br />raise the water table to where it is killing <br />the land, also gives us the tools not only to <br />find out why, but to find out what to do about <br />it. <br /> <br />The tools are, initially, the laboratory. In <br />it we can examine the salt we find in the water, <br />trace its origin, determine its concentration. <br />From that we can build a hypothesis to <br />explain what is happening. <br /> <br />From there we must go to the field and <br />test the hypothesis. Wells at varying distances <br />from a source of seepage can tell us how the <br />water table is affected by that particular <br />source, and how the veins of salt are lying <br />under the surface. Soils analysis can tell us <br />how badly a particular field is affected. <br /> <br />Some things we are still discovenng. How <br />long, once the water table is lowered, will it <br />take for the salt to be leached out of the <br />root zone? A decade? A century? Longer? <br />How much water is enough? <br /> <br />14 <br />