Low-pressure Drip System In Reduced
Tillage Cotton
Author(s)
B. Marsh, M. Dowgert, R. Hutmacher & C. Phene
Abstract
Research has shown the soil and water conservation advantages of subsurface
drip irrigation. Low-pressure drip system (LPS) technology has shown a high
potential for economically improving application efficiency of irrigation systems
under sandy soil conditions in areas where water is scarce and/or expensive.
Energy costs are reduced as less than 70 grams per square cm is needed for
system operation. The low-pressure system is installed just below the soil
surface, it operates at very low flow and pressure, and it can stay on for longer
periods of time without generating runoff or deep percolation. This study is
designed to assess LPS under a reduced tillage system without the use of any
other irrigation method for stand establishment. This combines the benefits of
increased water use efficiency and lower energy costs for improved irrigation
efficiency and fewer tillage operations resulting in lower production costs and
less airborne dust. Since the drip tape was installed two years ago, only
3 cultivation passes have been made. No major tillage operations, the kind that
generate lots of dust, have been performed. LPS water usage was 15% less than
furrow irrigation and yields of cotton (Gossypium hirsutum) and blackeye beans
(Vigna unguiculata) were comparable to yields from furrow irrigation. This
system does present some challenges in stand establishment on very sandy soils
and with weed control, which continue to be investigated. Herbicides requiring
incorporation were not used. Weeds can be controlled in cotton using glyphosate
and other herbicides. Fewer chemical weed control options are available for
blackeye beans. The LPS technology has many potential technical, energy and
economic advantages over standard drip and subsurface drip irrigation.
Keywords: cotton, low-pressure drip irrigation.
Keywords
cotton, low-pressure drip irrigation.
Related Book
Other papers in this volume
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