. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Lysimeter Experiments 9 THE LYSIMETERS AND THEIR TREATMENT Construction of the lysimeters The lysimeters are built of concrete. Each tank is 4 feet and 2 inches square, with sides 4 feet and 3 inches deep and with a funnel-shaped bottom. There are twenty-four tanks, arranged in two rows of twelve each. The rows are 6 feet apart. Between the rows is
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Lysimeter Experiments 9 THE LYSIMETERS AND THEIR TREATMENT Construction of the lysimeters The lysimeters are built of concrete. Each tank is 4 feet and 2 inches square, with sides 4 feet and 3 inches deep and with a funnel-shaped bottom. There are twenty-four tanks, arranged in two rows of twelve each. The rows are 6 feet apart. Between the rows is a tunnel 6 feet wide, the bottom of which is 10 feet below the top of the tanks. From the lowest point in the bottom of each tank a drainpipe leads into the tunnel, where receptacles are placed to catch the drainage water. The surface of the soil in the tanks is level with the surrounding soil of the field. The walls of the tanks do not form the inside walls of the /^// lA/afh ,ce'//r7Cf5,parfyt/onSj anc/ sfa/'r3 fo be reenforced b(^ sfee/ set m center of concrete /etreads /O' /tf/sers /j2. 5ku//qht P/Vth 30° f^ ?47Tr+- -^^ Shi^/ighi- ;'jt Tmnne/ f/oor- ^o s/ope / /r> /O ^-???.•???:= ?.??>'.:' Fig. 2. vertical section op tunnel, with sides and bottoms of tanks indicated BY dotted lines tunnel, but there is soil between these walls which is intended to reduce conduction of heat from the tunnel to the soil of the tanks. Before soil was placed in the tanks the walls were covered with water- proofing asphaltum to prevent the soil water from taking up any calcium from the concrete. The tops of the tank walls are covered with sheet iron, which extends down the sides 5 or 6 inches to protect the asphaltum during tillage operations. The drainpipe is made of brass, fined with tin, and is 2 feet long and 2 inches in diameter. It is made large enough to permit of easy cleaning and has no bend. The tube has a removable cap on the lower end, and into the middle of this cap is fixed
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