ABSTRACT
The use of organic materials for the rehabilitation of arid lands and deserts and the techniques for arriving at the final product of more stable soil organic matter and humus depend largely on the kind of raw material originally applied, the method of application, and the specific environment under which biodegradation occurs. Climatic conditions in the area largely control the choice(s) of application system that may be selected. The most desirable application system is not always the most economical, requiring a studied choice of methodology depending on the availability of transport and spreading or injection equipment. The alternatives for transport and application to the land vary according to the major conditions just mentioned, which include more specifically (1) the nature of the waste generated for its physical form-solid, slurry, or liquid; (2) the hazardous character and timeliness characteristic of the system; (3) on-site treatment-storage, volume, and removal of undesirable constituents; (4) transportation facilities; (5) treatment required: dewatering, storage, size change, and dilution; and (6) application to the land: mechanical spreading, soil injection, and irrigation; surface, sprinkling, canal channeling, and! or pipe and lining.
