ÖZET"Bu araştırma Kars çayır toprakları ile Sarıkamış orman topraklarının dispersiyon nispetleri, dolayısiyle erozyona mukavemet derecelerinin araştırılması gayesiyle yapılmıştır. Nümunelerin dispersiyon nispetlerine ait rakamlar "15" sınır değerinin üzerinde bulunmuş ve Sôz konusu toprakların erozyona müsait karakterde oldukları tespit edilmiştir"SUMMARY1. This investigation has been doneto determine erodibility of thepasture soils in Kars and forest soilsin Sarıkamış, based on their dispersionratios. Such an investigation isalsa important .in terms of making aeonservation farm plan in the. fu ture,beeause a knowledge of erosian characteristicsof the soil is necessary for thisabove-mentioned planning.2. The investigation area involvesthe pasture soils in Kars and the.forest soils in Sarıkamış.3. The mechanical analyses haveshown that the soils of the pasture andforest areas are usııaIly heavy intexture,4. Less than 50 micron of waterStableaggregates has been foundbetween 16.9 -20.2 /;; for the pasturesoils and between 12. ı - 30.4 /;; forthe forest soİls.5. Less than 50 micron of the particles,according to the mechanicalanalyses is between 80.7-85.1 /;; in thepasture soils and between 67,5-82,9/;; in the forest soils.6. it has been foıınd that thedispersion ratios of the soils investigatedare more than figure "15".This shows that the soils are susceptibleto erosion.