OLIVER LEKAJ1, BESNIK GJONGECAJ2*, PRANVERA MZIU3, PASHK LEKAJ4
In spite of the undisputable importance of the cumulative particle size distribution curves in textural assessment of soils, there is not any effort, up to now, to build them in the research process of Albania. Even more, there is not any effort to use or apply these curves in the general practice of soil management. The only way to deal with the texture of Albanian soils up to now has been by using the textural triangles, which many times have brought confusion in the process. That is why, the objective of this study is to initiate the process of introducing the cumulative particle size distribution curves in research process of scientists in Albania and on this base, developing some more accurate methods to replace gradually the textural triangles in the textural assessment process of soils. In this context, this article will be followed by other ones, in order to cover adequately the entire process of replacement the textural triangles by cumulative particle size distribution curves. The method applied is based on the combining of three very much known classifications on particle sizes: ISSS, USDA and Katschinski ones, with their specific particle sizes limit ranges. The soils picked to carry out the study are respectively representatives of three major groups, divided as such based on textural status: light soil, medium soil and heavy soil. The curves were determined by applying the regression analysis. The determined functions showed the distribution of particles of various sizes over a range starting from less than 1 μm to 2000 μm. It resulted that the best fit, for each of the three soils considered, is a semi logarithmic function, which is in accordance with the results of many research works done in this area.