The Bulgarian Humic Substances Society was established on December 2nd, 1997. It is registered in the court on the 8 of May 1998 as a non profit organization (NGO), re-registered in the court on the 25 June 2002, 14 January 2009 and – 3 December 2012 after elections for New board of the society and the changes in the organization’s statutes. The last changes were registered in
the Inscribed Agency on the 16.07.2019.

The initial number of members was 25 but in the two following years they increased up to 61. These scientists and researchers belong to the following scientific organizations and state institutions:

• N. Poushkarov Institute of Soil Science, and Agrotechnology and Plant Protection, Sofia;
• Institute of Nuclear Research and Nuclear Energy, Sofia; University of Forestry, Sofia;
• Institute of Forestry, BAS, Sofia; High Agricultural Institute, Plovdiv;
• Dobroudga Agricultural Institute, Gen. Toshevo, Sofia University;
• Forage Crop Institute, Pleven;
• Institute of Organic Chemistry, BAS, Ministry of Agriculture.

Most of the bulgarian members belongs to the ISSAPP N. Poushkarov, Sofia. The Board of Directors of the Society elected periodically at the National Meetings.

The Society was officially registered in Court on May 8th, 1998.The Bulgarian Humic Substances Society enrolls scientists and specialists who are interested in humic substances of various nature and provenance, such as soil, coal, peat, sediments and organic wastes, and are involved with topics related to soil genesis, agriculture, horticulture, floriculture, ecology, geology, geography, medicine and industry. Many studies concern:

• characteristics of HS from soils, coal and sediments;
• composition of humus including its implications in soil classification;
• organic carbon reserves in Bulgarian soils;
• theoretical studies on the initial humus formation in anthropogenic and artificial soils;
• development of products, methods and technologies to maintain and increase soil humus content;
• utilization of organic wastes and impact on natural HS;
• organic farming;
• management of initial humus formation using mineral and organo-mineral amendments;
• HS complexes with heavy metals and radionuclides in soils and sediments;
• development and utilization of organic and organo-mineral media for plant growth;
• development of bulgarian and international projects aiming to maintain and to increase soil humus, to utilize organic wastes, and to perform land reclamation;
• monitoring the humus state in bulgarian soils.

The main goal of the Bulgarian Humic Substances Society (BHSS) is to organize, support and to stimulate scientific investigations on humic substances, and to promote their practical application. Forum for presentation of results and achievements in this direction are at national and abroad scientific meetings.

Bulgarian Humic substances Society organized five conferences:

• The first Conference of the Bulgarian chapter of IHSS was held in Borovetz, Sofia region, 11-12 May, 2000
• The second BHSS Conference with international participation and held on 17-19 September, 2003 in Borovetz, Sofia region
• The third Conference with international participation was held on 12-16 September, 2011, in Sofia
• The fourth BHSS Conference and Bulgarian chapter of IHSS with international participation was held on 8-10 September, 2016, in Sofia.
• The 19^th Meeting of the International Humic Substances Society was successfully held in Albena resort, Bulgaria from September 16 to 21, 2018