The ICEID or International Conference on Emerging Infectious Diseases is a conference for public health professionals on the subject of emerging infectious diseases. The International Conference on Emerging Infectious Diseases was first convened in 1998; ICEID 2006 marks its fifth occurrence.
Clay type, organic content, and soil structure also influence soil water retention. The maximum amount of water that a given soil can retain is called field capacity, whereas a soil so dry that plants cannot liberate the remaining moisture from the soil particles is said to be at wilting point.
Water Availability. Key Points. Available water is the difference between field capacity which is the maximum amount of water the soil can hold and wilting point where the plant can no longer extract water from the soil. Water holding capacity is the total amount of water a soil can hold at field capacity. Sandy soils tend to have low water storage capacity. Sub-soil constraints (acidity, hardpans etc.) can prevent crops accessing water in the subsoil. Structure and depth of crop roots affects access to available water.