Source:

Dept. of Crop Physiology, TNAU, Coimbatore

Related links:

http://www.plantstress.com/Articles/drought_m/drought_m.htm
http://www.plantstress.com/Articles/index.asp
http://www.drought.unl.edu/
http://www.drought.noaa.gov/
http://www.aces.edu/issues/drought//

University drought sites:

Alabama Cooperative Extension Service
Clemson University (South Carolina)
Colorado State University
Iowa State University
North Carolina State University
North Dakota State University
Ohio State University
Oklahoma State University
Pennsylvania State University
Purdue University
Texas A&M University
University of Georgia
University of Kentucky
University of Maryland
University of Nebraska