|Filtration, Treatment, and Maintenance Considerations for Micro-Irrigation Systems||
Micro-irrigation systems can deliver water and nutrients in precise amounts and at controlled frequencies directly to the plant's root zone. With micro-irrigation systems, an extensive network of pipe is used to distribute water to emitters that discharge it in droplets, small streams, or through mini-sprayers. The major cause of failure in micro-irrigation systems is emitter plugging. Emitter plugging can severely degrade irrigation system performance and application uniformity. Because the emitters are small and can easily plug, it is important to understand the filtration and maintenance requirements of these systems and be proactive to prevent plugging. The basic components of a typical micro-irrigation system are shown in Figure 1.
|May 1, 2009||442-757|
|Household Water Quality: Household Water Testing||
Concerns about personal and family health may lead you to question the safety of the water used in your household.
|May 1, 2009||356-485|
|Household Water Quality: Water Quality Problems - Causes and Treatments||
Many areas have water containing impurities from natural or artificial sources. These impurities may cause health problems, damage equipment or plumbing, or make the water undesirable due to taste, odor, appearance or staining.
|May 1, 2009||356-482|
|Interpreting Your Water Test Report||May 1, 2009||356-489|
|Questions to Ask When Purchasing Water Treatment Equipment||
Until recently, the point‑of‑use water treatment industry focused on improving the aesthetic quality of drinking water. The industry has lately been thrust into the forefront of treatment of contaminated drinking waters that pose a serious health hazard. The response has been a plethora of companies and products promising to render the consumer’s drinking water safe and contaminant free.
|May 1, 2009||356-480|
|Virginia Farmstead Assessment System: Management of Irrigation Systems||
More than 40% of Virginia's population depends on wells or springs as a source of drinking water and this dependence is close to 100% in rural areas. Furthermore, approximately one-fourth of all Virginia households rely on an individual water supply system, such as a backyard well or spring Figure 1. Wells and springs should be designed and managed to provide clean water. If improperly constructed or maintained, however, they can allow bacteria, pesticides, fertilizers or petroleum products to contaminate groundwater. These contaminants can put human and animal health at risk.
|May 1, 2009||442-902|
|Virginia Farmstead Assessment System: Site Evaluation: Groundwater, Soils, & Geology||
In Virginia, groundwater is an important source of private and public water supplies. In fact, in 60 of Virginia's 95 counties, the majority of households obtain water from private wells and springs (see Figure 1). For 38 counties, groundwater is the sole source for public water supplies, and another 16 counties depend on groundwater to obtain more than 50 percent of their water for public supplies. Overall, more than one-third of Virginia's almost 6.4 million residents depend on groundwater. Agriculture, an important part of Virginia's economy, maintains its high productivity, partially by using groundwater. According to U.S. Geological Survey estimates for the year 1990, almost 22 percent of the 36 million gallons of fresh water source used per day for crop irrigation in Virginia was derived from groundwater.
|May 1, 2009||442-901|