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7-14-04; 17:40 ;Lester Bulldlna ;3203955376 # 9/ 28 <br /> Article Request Page Page 7 of 26 <br /> Water Introduction and Control <br /> The six tanks were paired,and each of the three pairs subjected to a different water tteatment as <br /> specified in Table 2 and illustrated in figure 5. <br /> Table 2.Water Treatment for Tanks <br /> Treatrnent Designation Tanks Higher Water Table Maintained Surface Water A lied <br /> A 1 &2 Yes No <br /> B 3 &4 No —�Yes <br /> �— —� 5 &6 Yes Yes <br /> Continu ous <br /> water flow <br /> Piastic pail with <br /> constantv�raterlevel � � � � � � � � � _ � � � � . . . . . . . . . . . . . . <br /> To drein To drain <br /> Figure 5.Tank plumbing/watering system. <br /> The higher water table level in tanks 1,2,5 and 6 was obtained by connecting their water <br /> supply/dra�n lines to the bottom of a plastic pail.With the system shown in figure S,the elevation <br /> of the water table in tanks 1,2,5 and 6 was equal to that in the pail.Lines connected to taiilcs 3 and <br /> 4 provided for unrestricted drainage of the tanks.The elevation of tlie water table in tanks 3 and 4 <br /> was level with the bottom of the drain lines at their highest point,which for the duration of the <br /> study was the point where the lines were connected to the taaks. <br /> Water was sprinkled on the surface of tanks 3,4,5 and 6 beginning on the first day of the study and <br /> on two week intervals thereafter. In each bi-weekly sprinkling,3.8 cm(1.5 in.)of water were added <br /> to each tank.This sprinkling was done manually as shown in fig�ure 6 and took approximately 15 <br /> minutes per tank. <br /> http://asae.fiymulti.com/request2.asp?JID=S&AID=140828�CII�1nv2003&v=&i=&T=1 6/4/2004 <br />