- Reduce or eliminate
tillage. Tillage contributes to subsurface hard pans in the soil that reduce
the soil’s ability to store moisture. Over time, usually after 3 seasons,
no-till farms will show improvement in regard to soil tilth, surface residue,
and organic matter in the soil. All of these contribute to the soils’ ability
to retain moisture internally.
- If tillage is necessary
do the minimum to correct a problem or set up a field. Avoid tillage during
the late fall or winter months. Tillage during these times greatly increases
the chance of erosion, excessive runoff and contamination of surface water.
- Use overhead sprinkler
irrigation when possible. Overhead sprinkler and drip irrigation systems use
less water than furrow irrigation. Border irrigation for surface irrigated
soybeans and side-inlet systems for rice reduces the amount of water needed.
- When using furrow
irrigation, attempt to get the water on and off the field as quickly as
possible. The ideal distance to run water is 620 feet. Short, frequent
surface irrigations minimize runoff. It takes more water, is less efficient,
and is less effective to run long rows of surface irrigation.
- When furrow irrigating,
monitor the low side of the field closely and discontinue pumping when the
irrigation water reaches the bottom of each field. This is probably the
single most wasteful practice in the Delta. The water that is not collected
in a tailwater recovery system is wasted as far as plant uptake is concerned.
- Consult with local NRCS
staff for recommendations on establishing tailwater recovery areas on a farm.
Take advantage of the natural topography of each farm whenever designing
tailwater recovery systems. Tailwater recovery systems can be many different
sizes, but they all will reduce water usage on a farm. It is also less
expensive to move surface water in a tailwater system than to pump water from
below ground.
- Make sure that any
irrigation water leaving a field is clean and clear. In the Delta, water is
one of our greatest natural resources. In order to protect and insure our
abundant water supply, it is imperative that we follow sound soil and water
conservation practices.
The DCDC is establishing a
demonstration of Tier I, Tier II, and Tier III of the Conservation Security
Program (CSP) at the Metcalfe farm. This program effectively demonstrates water
conservation.
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