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increased. However, wood ash didn’t have significant influence on plantchemical composition, only some tendencies were noticed. Accordingreferences, wood ash improves soil agrochemical properties. But there are nodata on wood ash use in different by pH and nutrient amounts soils. Therefore,exhaustive long-term researches are necessary to investigate how wood ash canbe used for vegetables and field plants fertilizing.Conclusions. 1. Wood ash increased plant yields, improve their quality,therefore, is suitable for red beet and potato fertilization.2. All wood ash rates significantly increased the root yield of red beet.The highest (40.8 t ha -1 ) yield was obtained when fertilizing by 9 t ha -1 of woodash. The most efficient wood ash rate for red beet was 6 t ha -1 , when onet ha -1 of wood ash increased the root yield by 2.05 t ha -1 .3. Fertilizing with wood ash didn’t have significant influence on thechemical composition (N, P, K and crude protein amounts) of red beet roots.Increasing wood ash rates, the amount of Ca in the red beet roots successivelyincreased. Fertilizing by different wood ash rates increased the amount ofvitamin C in the red beets, but significant differences weren’t obtained.Fertilizing with different wood ash didn’t have significant influence on nitrateaccumulation in red beets. The amount of nitrates in the roots of red beetdidn’t exceed permissible limits.4. All wood ash rates significantly increased potato tubers yield. The highest(16.5 and 17.1 t ha -1 ) potato tuber yields were obtained where 4 and 6 t ha -1 ofwood ash were applied. The highest potato tuber extra-yield (0.72 t ha -1 ) fromone t ha -1 of wood ash was determined when fertilizing by 4 t ha -1 .5. Fertilizing with wood ash decreased the amount of vitamin C in tubers,but significant differences among the treatments weren’t observed. Fertilizingwith wood ash, independently on the rate, less nitrates accumulated. Differentwood ash rates had significant influence on the accumulation of the starch.The higher wood ash rate was applied, the smaller amounts of starch weredetermined.Gauta2005 12 01Parengta spausdinti2006 03 01213