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each treatment. All emitters will be %: gallon/hour (gphl rated. Daily watering times will be varied to achieve <br />watering treatments of 0.3, 0.6, and 1.3 gal/day/tree (assuming a 4 ft~ watered area, this is the equivalent of <br />3.6, 7.2, and 14.4 inches of additional precipitation per monthl. Achieving this water application using %: gph <br />emitters, will require daily water times of 36, 72, and 144 minutes for the 0.3, 0.6 and 1.2 gpd treatments <br />respectively. This schedule will consume a total of 210 gallons of water per day, or 1470 gal/week through the <br />growing season. Therefore, at least a 2000 gal storage tank is recommended. <br />Water application will be achieved using three automatic sprinkler system valves controlled by an electronic <br />sprinkler system clock. All will be powered by 12 or 24 volt DC marine batteries recharged by solar cells. All <br />water will be filtered at the tank to avoid clogging emitters and valves. <br />4.0 DATA COLLECTION <br />Weather and Soil Data - A weather station recording temperature, precipitation, and rainfall will be installed at <br />the study site. Additional emitters will be installed at randomly selected locations from each soil type in each <br />Block's drip system grid. Water will be collected in tanks at some of these locations to verify the amount of <br />water delivered. Soil moisture (within the rooting zone) will be monitored by periodically sampling soil from <br />other non-tree emitter locations and randomly selected locations in the control block, then weighing, and oven- <br />drying the samples to obtain moisture contents. Multiple samples will be collected in a grid pattern at selected <br />non-tree emitter to quantify the area affected by irrigation. <br />Differences between soil conditions between reclaimed soils in the study area and those under nearby <br />undisturbed aspen clones will be quantified by comparing physical and nutrient characteristics of soil samples <br />from both the normal and augmented reclaimed soils to those of the natural soils. The soil characterization for <br />physical, nutrient, and moisture conditions at the study plot will include upper portions of the spoil Itop 4 feet <br />or sol in addition to the replaced soil. Effects of reclamation on soil moisture regimes will be investigated by <br />monitoring soil moisture during the growing season in undisturbed clones to that of un-irrigated portions of the <br />study site. Differences in nutrient availability between augmented and un-augmented reclaimed soil and <br />undisturbed soils under aspen clones will be documented by use of buried resin bags in each soil type. <br />Aspen Data -After planting, the heights and basal caliper of all trees will be measured to the nearest millimeter. <br />In addition, the length of the terminal leader and length of each lateral branch will be measured to the nearest <br />centimeter. At the conclusion of the first growing season after transplanting, all planted trees will be checked <br />for survival and the current year's growth of the terminal leader and lateral branches measured. Any dieback, <br />damage, or disease will also be noted. Ten randomly selected trees in each watering treatment will be <br />excavated by washing soil away from roots with a pressurized water hose connected to the storage tank. The <br />lengths of all new growing roots will be measured. All roots less than 5mm in diameter will be collected, oven- <br />dried, and weighed. All leaves will be collected, their area measured, and oven-dried and weighed. <br />li!+YPIS /.t.wvl/V'/PAOI/A0pnR"R3 <br />il3f/0f,14 <br />