Transfer functions were developed between the protocols used to analyze soil texture by East European (Katchinski), U. K. and U. S. methods. Ninety-two (0–20 and 20–40 cm depth) samples of Eutric Albeluvisols were collected from 46 long-term field plots of the Kaltinėnai Research Station of the Lithuanian Institute of Agriculture. The soil samples were from five sites. Three sites have been monitored for eight years and are representative of six land management systems on slopes with different soil textures. In addition, two further sites were sampled, which have been monitored for 20 years and are representative of four management systems on 2–5, 5–10 and 10–14° slopes.

The database contains results of the 92 textures obtained by laserdiffraction, USDA and Katschinski methods and provides calibrations and correlations between soil textural classes analyzed using the different protocols. The EXCEL macro BOOTiFUL has two stages. Stage 1 involves mathematical interpolation procedures to recalculate sand, silt and clay contents. The equations assume linear transitions in the percentage content between the individual particle size intervals and, therefore, has some errors. However, the strong significant correlation coefficients (r = 0.833–0.942) suggest the procedure to offer a valuable calibration approach. The remaining differences may represent variations in laboratory analytical techniques. Thus, Stage 2 uses the least-squares regression equations to convert Katschinski data to comparable values of both the U. K. and U. S. methods, with no significant differences between the three data sets. Consequently, this allows direct cross-reference between East European, U. K. and U. S. textural classifications. However, there is a need to continue the calibration of the textural properties of Lithuanian soils using additional samples with more diverse textures.

Keywords: Soil texture classes, Eutric Albeluvisols, Laser-diffraction, Katschinski method