Interlaboratory comparisons (LAK) and proficiency tests (PT) are important tools in assessing the technical proficiency of calibration/testing laboratories. Laboratories accredited within the scope of TS EN ISO/IEC 17025 standard are required to achieve successful results by participating in the LAK and/or PT program. Our institute has TÜRKAK accreditation in 5 parameters within the scope of TS EN ISO/IEC 17043 Standard and provides proficiency testing services in different parameters on soil, irrigation water, chemical fertilizer and organic fertilizer. You can follow the announcements published on our website to apply for the qualification exam. You can review the Proficiency Testing Services Information Form for detailed information about our proficiency testing services.