Photograph of a close up shot of roots from first year clover on a failing field located on Norman Farm. The back of the photograph proclaims, "This field was failing; yields were low; the land was tight although rated as a medium textured soil. This excavation was made on one of the thin areas. The roots were growing out laterally. This was the first year of clover. See Okla-10-286."

Photograph of a close up shot of roots from first year clover on a failing field located on Norman Farm. The back of the photograph proclaims, "This field was failing; yields were low; the land was tight although rated as a medium textured soil. This excavation was made on one of the thin areas. The roots were growing out laterally. This was the first year of clover. See Okla-10-286."

Photograph of a soil coring machine extending beyond the roof or top of a jeep. Front view, upper section with cover to the right. 1. Idler sprocket pine bearing. 2. Upper limit switch. 3. Coring hand drive and mounting arrangement on push-pull roller chain. 4. Tension adjustment, slats and adjusting screws to tighten chain. Breaker block to stop coasting movement of mechanism after limit switch cuts off power. 6. Cover with bolt hole which fastens to angle iron support and fastened in place by stud in the threaded hole in angle iron. OK-10-604-I.

Photograph of the right side view of a Willys Jeep with soil coring machine attached. One tube is 52 inches long for making 4 foot tests in alfalfa land for a high water table. With the three short tubes, one is for collecting profiles of shallow soils under native vegetation; one for collecting deep soil profile under virgin conditions (sample to be carried into cultivated field for comparison and evaluation of soil losses); and, the third one to be used in the process of surveying. Cab should have ample window space for light, the inside being coated with aluminum paint for better light reflection. Comfortable seats, both front and back should be installed. The front seat here is a recovered bucket seat from a 1936 Plymouth panel truck. The muffler is moved outward and attached to the jeep’s body. 10-604-A.

Photograph of the Willys Jeep, viewed from under the jeep, looking up showing the mounting arrangement of reduction gear drive box, drive sprockets, clutch, tension spring and pilot bearing. Also note the manner whereby the muffler is moved outward. OK-10-604-G.

Photograph of the Willys Jeep. Rear view looking upward under the jeep showing features of pilot bearing mounting; the position of the hole in the floor board; and, the muffler mounting and, incidentally, the rear, right tire. The Jeep is on a grease rack. OK-10-604-E.

Photograph of features of soil coring tubes. 1. Arrangement of the open side, milled with a cutting tool. 2. Cross pin for driving and lifting tube (hardened steel). 3. Threaded (female) end of tube into which points might be changed (seemless steel tubing0. 4. The tip threaded as made to specifications (male) and hardened with variable size opening of the tip to fit different soils. ok-10-604-H.

Photograph of the Inside [unclear] view of soil coring machine from the driver’s seat. Tube cleaner in foreground is near the operator where 99% of the fastened cores in tip can be jarred lose by hand simply by setting tube in the cleaner and pushing downward on soil coring tube. Lower limit switch can be used with power by swinging around. Drive head with soil coring tube being lowered. Cover for drive mechanism. Hole in floor board to dispose of soil from the coring tube (hinged to jeep cab and held open by 1/4 inch stove bolt which hinges to the right or left in double nut welded to jeep cab. Heater located so that heat is thrown back into the cab. The base of the soil coring machine shown here is a 1/4 inch slab of steel. [unclear] Too light it springs downward on pulling soils from heavy clays. OK-10-604-C.

Photograph of a soil coring machine viewed from the operator's seat of the Willys Jeep We see the tube cleaner with the soil coring tube lowered in which position heavy clays can be forced out by use of power; the motor mounting mechanism; the solenoids and wiring arrangement; the light switch; and, the conduit for the upper limit switch. Hole in floor board (3.5 x 4.5 inches) is for the disposal of soil from soil coring tube. OK-10-604-B.

Photograph of the Willys Jeep with a view from underneath looking upward and toward the rear. Note the rear wheel and spare tire mounting. Also shown is the gear reduction box and mounting position. OK-10-604-F.

Photograph of the Willys Jeep with a view of the soil coring machine through the opened, right-hand door. OK-10-604-D.

Photograph of the inside cab view of soil coring machine from drivers seat. Tube cleaner in foreground is near the operator where 99% of fastened cores in tip can be jared loose by hand simply by setting tube in the cleaner and pushing downward on soil coring tube. Lower limit switch can be used with power by swinging around drive head with soil coring tube being lowered. Cover for drive mechanism. Hole in floor board to dispose of soil from the coring tube (hinged to jeep cab) and held open by 1/4 inch stove bolt which hinges to the right or left in double nut welded to jeep cab. Heater located so that heat is thrown back into cab. The base of the soil coring machine shown here is 1/4 inch slab steel and is too light for this application, the steel springs downward when pulling soils from heavy clays.

Photograph of the inside cab view of soil coring machine from drivers seat. Tube cleaner in foreground is near the operator where 99% of fastened cores in tip can be jared loose by hand simply by setting tube in the cleaner and pushing downward on soil coring tube. Lower limit switch can be used with power by swinging around. Drive head with soil coring tube lowered. Cover for drive mechanism. Hole in floor board to dispose of soil from the coring tube (hinged to jeep cab) and held open by 1/4" stove bolt which hinges to right or left in double nut welded to jeep cab. Heater located so that heat is thrown back into cab. The base of soil coring machine shown here is 1/4" slab steel and is too light as it springs downward on pulling soils from heavy clays.

Photograph of rear view looking upward under jeep showing features of pilot bearing mounting, postion of hole in floor board, muffler mounting and incidentally the rear right hand tire. Jeep is on a grease rack.

Photograph of a rear view looking upward under jeep showing features of pilot bearing mounting, position of hole in floorboard, muffler mounting and incidentally the rear right hand tire. Jeep is on a grease rack.

Photograph of inside cut view of soil coring machine from drivers seats. Tube cleaner in foreground is near the operator where 99% of fastoned cores in tip can be jarred loose by hand simply by setting tube in the cleaner and pushing downwaR\rd on soil coring tube. Lower linmit switch can be used with power by swinging around. Drive head with soil coring tube being lowered. Cover for drive mechanism. Hold in floor board to dispose of soil from the coring tube (hinged to jeep cab) and held open by 1/4" stove bolt which hinges to right or left in double nut welded to jeep cab. Heater located so that heat is thrown back into cab. The base of soil coring machine shown here is 1/4" slab steel on too light it springs downward on pulling soild from heavy clays.

Photograph of a soil coring machine viewed from operators seat showing: Tube cleaner with soil coring tube lowered in which position heavy clays can be forced out by use o power. Motor mounting mechanism. Solenoids and wiring arrangement. Limit switch. Conduit to upper limit switch. Hole in floor board (3.5x4.5") for disposal of soil from soil coring tube.

Photograph of soil coring machine through open right hand door.

Photograph of soil coring machine viewed from operators seat showing: Tube cleaner with soil coring tube lowered in which position heavy clays can be forced out by use of power. Motor mounting mechanism. Salenoids and wiring arrangement. Limit switch. Conuit to upper limit switch. Hold in floor board (3 1/2x4 1/2) for disposal of soil from soil coring tube.

Photograph of a soil-coring machine and its' cover. The back of the photograph proclaims, "Front view, upper section, with cover to the right. 1. Idler sprocket pine bearing. 2. Upper limit switch. 3. Coring head drive and mounting arrangement on push pull roller chain. 4. Tension adjustment, slots and adjusting screws to tighten chain. 5. Breaker block to stop coasting movement of mechanism after limit switch cuts off power. 6. Cover with bolt hole which fastens to angle iron support and fastened in place by stud in treaded hole in angle iron."

Photograph of the front view of the coring machine, upper section, with cover to the right. 1. Idler sprocket pine bearing. 2. Upper limit switch. 3. Coring head drive and mounting arrangement on push pull roller chain. 4. Tension adjustment, slots and adjusting screws to tighten chain. 5. Breaker block to stop coasting movement of mechanism after limit switch cuts off power. 6. Cover with bolt hole which fastenes to angle iron support and fastened in place by stud in threaded hole in angle iron.

Photograph of the features of soil coring tubes (in upper portion of photo). 1. Arrangement of the open side, milled with cutting tool. 2. Cross pin for driving and lifting tube (hardened steel). 3. Threaded (female) end of tube into which points might be changed (seamless steel tubing). 4. The tip made to specifications threaded (male) and hardened with variable size opening of tip to fit differnt soils.

Photograph of parts of a soil coring tubes sitting on top of a Jeep's hood owned by Department of Agriculture/Soil Conservation Service. The back of the photograph proclaims, "Features of soil coring tubes. 1. Arrangement of the open side, milled with cutting tool. 2. Cross pin for driving and lifting tube (hardened steel). 3. Threaded (female) end of tube into which points might be changed - (seamless steel tubing). 4. The tip made to specifications threaded (male) and hardened with variable size opening of tip to fit different soils."

Photograph of the underside of a jeep looking upward. The back of the photograph proclaims, "View from underneath looking upward and toward the rear - note rear wheel and spare tire mounting. Shows gear reduction bar and mounting position."