Liquid manure-pumps, tanks and application method
John B. Dobie
California Agriculture 1(12):1-2. DOI: 10.3733/ca.v001n12p1d.
Not available – first paragraph follows:
The three inch centrifugal pump, designed to handle up to 40 per cent solids without clogging, is widely used in handling liquid manure.
John B. Dobie is Associate in Agricultural Engineering, Experiment Station, Davis.
Further suggestions for the installation and operation of the liquid-manure system are given in the California Agricultural Extension Service illustrated Circular No. 140, now available without cost by request addressed to the College of Agriculture, University of California, Berkeley 4, California.