The book of proceedings of the joint meeting of the International Network of Salt-Affected Soils (INSAS) and COST Action on the sustainable use of salt-affected lands (SUSTAIN) contains the abstracts of the oral and poster presentations presented during the workshop in Valencia, Spain (27-31 May, 2024). The presentations covered multiple topics related to the management, policy of salt-affected soils as well as crops adapted to these soils. These abstracts describe different approaches that provide insights to managing agriculture in saline conditions and ensuring food security for the world's growing population.