| How important is water | http://www.gardenweb.com/sesbania/watering.html |
| Drought Monitor maps | http://www.drought.unl.edu/dm/monitor.html |
| Soil, Water and Plant Characteristics Important to Irrigation | http://www.ext.nodak.edu/extpubs/ageng/irrigate/ |
| How soil holds water | http://www.ianr.unl.edu/pubs/fieldcrops/g964.htm |
| How much water does a plant/lawn need? | http://www.conservewater.utah.gov/OutdoorUse/OtherPlants/ |
| Water Conservation Facts | http://www.ocalafl.org/water/reuse/Whats%20New.htm |
| More Facts | http://www.dnr.state.sc.us/climate/sco/ourwater.html |
| More Facts | http://aggie-horticulture.tamu.edu/extension/xeriscape/ |
| Glen-Hilton Mini-Clik II Rain Sensor | http://www.watertips.com/ |
| The First Reliable Wireless Rain Sensor | http://ag-irrigation.com/ |
| Water Timers | http://www.mrdrip.com/sprinklertimers3.htm |
| Green Touch Landscape Supply | http://www.greentouchirrigation.com/biogreen.html |
| Pool and Garden | http://poolandgarden.com/garsprin.html |
| Rodex - sensors | http://infoweb.magi.com/~rodex/irrig.html |
| Accurain | http://accurain.com/home.html |
| Smarthome - sensors | http://smarthome.com/howto08.html |
| Bio-green - fertilizer and water system | http://www.bio-green.com/ |
