Initial page for CALS site, part of the University of Arizona, headquartered in Tucson, Arizona. The College is engaged in teaching, research and outreach in many fields in environment and natural resources, family and youth, human nutrition, food safety, health, marketing and trade, animal systems, and plant systems.

This site provides information on the Division of Reclamation, Mining and Safety, as well as many of the division's projects and other related topics. ...

Colorado State University Extension

This site offers software and articles on waterlogging, agricultural drainage of irrigated lands including the interaction with irrigation and soil salinity control. The aim is to arrive at criteria for reclamation, rehabilitation, remediation, restoration, recuperation and amelioration of waterlogged and saline salt affected land so that desalinization and desalination is feasible while the process of salinization or salination is counteracted. Software is offered for segmented regression, cumulative frequency analysis, horizontal en vertical subsurface drainage with drains or wells, and also a rainfall surface runoff model. Soil salinity and watertable modelling is done using groundwater and salt balances (budgets).

Food and Agriculture Organization of the United Nations: essential documents, statistics, maps and multimedia resources