Received: February 21st, 2023 ; Accepted: May 8th, 2023 ; Published: May 22nd, 2023 ; Correspondence: [email protected] is specific water body sediments containing a high level of organic matter
formed from remains of water biota mixed with mineral components. One of the most promising
utilisation ways of sapropel is agriculture where it can be used as soil amendment to improve soil
physical properties and thus obtain economically viable and high quality yield of field crops. For three
years the experiments were conducted at Priekuli Research Centre of the Institute of Agricultural
Resources and Economics. Dehydrated sapropel mass from Lake Bizas was studied as soil biological
fertilizer to determine its suitability for use in field crop production. Researches were carried out
in organic crop rotation, in the fields of potato, winter rye and field bean. Three different doses
of sapropel fertilizer were applied. During the three-year period (2020–2022), the yield indicators
of the plant species included in the study were evaluated, and the quality of the yield of these species
was assessed. The results of research confirm the positive effect of sapropel on yield quality
indicators - protein (field beans), starch (potatoes) falling number and 1,000 seed mass (winter rye)
