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<br />l\) <br />/-t. <br />co <br />1-4 <br /> <br />14 Chapter3-Colorado River Water Quality Assessment <br /> <br />and Mohave. As part of this investigation, a <br />second portion of the contract evaluated the <br />potential for successfully stimulating algal <br />growth on a large scale in Lake Mead using <br />artificial fertilization. <br /> <br />The principal goals of the prefertilization study <br />were to determine the most suitable types of <br />fertilizer for large-scale additions to Lake Mead, <br />to evaluate methods offertilizer applications, <br />and to make recommendations regarding the <br />frequency of fertilizer additions. <br /> <br />Laboratory and cove experiments indicated that <br />liquid ammonium polyphosphate (10-34-0) and <br />either liquid ammonium nitrate (20-0-0) or <br />granular ammonium nitrate (34-0-0) were the <br />most suitable for nutrient enhancement. <br />Dispersal from slowly moving boats appeared to <br />be the most cost-effective method of uniformly <br />applying fertilizer. River injection of fertilizer <br />was examined and determined nonviable <br />method of improving lake fertility because of <br />inflow densities and lake stratification. <br />