Field and laboratory work sponsored by t h e Cas Research Xnstituto (Cat) 8nd the Department of Energy (WE) have shown t h a t calcium-carbonate scale formation in waters produced with natural gas and o i l can be preventod by injection of phosphonate inhibitor i n t o t h e tomation, even i t h e fornration is sandstone without calcite binding material. c a r r i e d out on DOE'S geopressured-geothermal Gladys Hccall brine-gas well and CRI's to-production wells in the Hitchcock f i o l d .

Results of the experiment conducted at Sugarcane Research Station, Thiruvalla revealed that all furrow irrigation had perceptibly increased the availability of soil moisture, reduced the soil temperature and improved the physical properties of soil. The availability of soil nutrients after the experiment increased appreciably with irrigation through all furrow method resulting in the enhancement of soil fertility. Alternate furrow irrigation had also recorded comparable values for above parameters. The treatments consisting of trash mulching either with all or alternate furrow irrigation had recorded higher values for the activity of soil enzymes like acid phosphatase, urease and cellulase and increased the microbial population of fungi, bacteria and actinomycetes. Trash mulching at 5 t ha -1 had also shown similar trends than unmulched plots. The skip furrow method of irrigation and Farmer's practice of irrigating the crop once in a month without trash application had shown comparatively lower values for all the above parameters. It was observed that alternate furrow irrigation with trash mulching could economise the usage of water to the tune of 50 per cent during the formative phase of spring planted sugarcane without any loss in cane yield.

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