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underground pipe and above ground lateral tubing and applied directly to the soil <br /> above the plant ' s root zone . Modifications to existing microirrigation systems <br /> that can be expected to increase system efficiency and reduce offsite movement <br /> of nutrients , pesticides , and sediment are also eligible. <br /> Grade Stabilization This practice includes the use of structures , 'pipe , concrete , <br /> rock , vegetation , synthetic fabrics , and other materials to maintain the stability <br /> and integrity of soils in ditches , swales , water furrows , and other erosion prone <br /> areas . This practice also includes equipment for chemical mowing of ditch banks <br /> to promote the proliferation of grasses through the exclusion of higher growing <br /> weeds and brush . <br /> On-Site Water Detention/Retention This practice will provide for the attenuation <br /> of both the rate and volume of off-site water and sediment discharge following <br /> heavy storm events . The water may be stored for future use or released off-site <br /> later at reduced discharge rates . <br /> Permanent Agrichemical Mixing/Rinsing Facility and/or Equipment Washdown <br /> Facility This practice provides for the construction of a permanent facility to <br /> contain and recover spillage or rinsate from a fertilizer or pesticide mix and load <br /> area or from an equipment washdown site . It is intended to prevent fertilizer or <br /> pesticide contamination of ground or surface waters . The facility may include a <br /> concrete containment pad , pesticide storage building , sump/pump , rinsate tank, <br /> mixing tank, holding tank, and removable or permanent roof. <br /> Portable Agrichemical Mixing Station A portable device used in the field to <br /> prevent unintentional release of agrichemicals to the environment during mixing <br /> and loading of agrichemicals . The portable device must meet published <br /> standards and specifications (USDA-NRCS Field Office Technical Guide — <br /> Interim Standard , Code 703 ) . The device can be used at more than one citrus <br /> grove. <br /> Precision Application Equipment Specialized equipment that allows nutrients <br /> and pesticides to be applied in a precise manner relative to the target of <br /> application . This includes sonic or optical sensors , devices that apply pesticides <br /> in a pre-defined , regulated manner, and equipment that uses GIS technology to <br /> allow application based on a predefined map . Precision application equipment <br /> often varies the rate of application , materials used , and location of application to <br /> achieve precise placement of the materials. Through this program , the <br /> department intends to cost share the precision elements of new equipment or <br /> retrofits to existing equipment that are needed to convert a non-precision <br /> spreader or sprayer into a precision spreader or sprayer. <br /> Water Table Observation Well This practice facilitates observation of the water <br /> table in a citrus grove and will help the manager to determine when groundwater <br /> levels are optimal . This practice will also improve irrigation efficiency and <br /> conserve water within the USJR and IRL watersheds by providing growers with <br /> an empirical tool to more accurately determine irrigation scheduling needs . <br />