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10245. Ramig, R.E. and L.G. Ekin. 1991. When do we store water with fallow?. 1991 Columbia Basin Agricultural Research, Special Report 879, OR Agr. Expt. Sta., Corvallis.
Water storage was monitored at Pendleton (16" precip.) and Moro (11" precip.), Oregon from 1978-1984. Storage percentages for the fallow winter, fallow summer, and crop winter were 75, -19, and 54 %, respectively. Significantly less water was stored during the fallow winter in both rainfall zones where the wheat stubble had been burned in the fall. Differences in water conservation and storage among other treatments (spring plow, fall flail, fall disk, and spring sweep) were not significant at both locations. Total water storage for the 18-month crop-fallow cycle was 37 % at Moro and 33% at Pendleton. The best opportunity to improve water conservation and storage in this climate appears to be during the crop winter when only 40-54% of the precipitation was stored.