Em4885 irrigation management practices to protect ground water

IP 5.01.03 - Install Straw Mulching in Furrows
Objective
Stabilize erosive soils and allow larger flows to be used in furrows to achieve good
down-row distribution uniformity.
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Description
This Practice is similar to IP 5.01.02 but is primarily aimed at furrow/rill irrigation systems
on easily erodible soils. It is especially recommended where erosive streams would be
needed to achieve sufficiently fast water advance. It has been particularly noted for use
with surge irrigation techniques.
SCS National Practice 484 addresses mulching as a means of reducing erosion.
IP 5.01.04 - Use Reduced Tillage (Paraplow) Cultural Systems
Objective
Increase infiltration rates to reduce surface runoff.
Description
This management practice is applicable to any type irrigation system and soil type, but
may be especially beneficial to low intake and easily eroded soils. This method was
developed primarily to reduce excessive runoff and soil erosion by increasing water
infiltration, maintaining crop residues, and reducing soil compaction due to repeated
tillage operations.
SCS National Practice 329 addresses conservation tillage systems. A criterion for a
conservation (reduced) tillage system is that 30% of the field be covered by plant residue
after planting.
IP 5.01.05 - Use Pressed (Slicked) Furrows with Furrow/Rill Irrigation Systems
Objective
Reduce the roughness and possibly the infiltration rate of the furrow so that smaller
non-erosive streams can be used to achieve the same advance speed.