Abstract: Process for soil conditioning includes applying to the soil a composition comprising at least a water soluble or swellable polymer. The composition has a particulate form and is applied by an aerial application. The process is suitable for soil conditioning and for reduction in soil erosion in agriculture, forestry, construction and civil engineering, mining, water storage and transportation, protection of rivers and delta against pollution, environmental conservation.

Abstract: A process for achieving enhanced levels of friction reduction in high salinity conditions, particularly suited to slick-water hydraulic fracturing and coiled tubing applications, uses low charge and preferably uncharged water soluble high molecular weight polymers. A fracturing fluid is injected into a conduit. The fracturing fluid is an aqueous solution comprising at least one water soluble (co)polymer comprising less than 10 mol % ionic monomer(s), and the aqueous solution comprises total dissolved salts concentration ranging from 100,000 mg/L to up to the salt concentration at which the aqueous solution becomes saturated in salts.