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Subsoiling for Increased Water Storage for Summer Fallow System Mark
Appleford Objective To test the effectiveness
of the M&W Earthmaster subsoiler in improving soil moisture conditions
and winter wheat crop in higher rainfall area of Asotin County.Location:
Anatone, WA - Montgomery Ridge Treatments Fall chisel Comments Subsoiling was performed on October 1, 1993. An M&W subsoiler with straight points at 24" centers was utilized. This implement also had a straight cutting disk gang in front of the subsoiler which was hydraulically operated independently of the subsoiler. This aided in handling heavy Hill 81 straw from the previous crop. Subsoiling was performed at a 12" depth. Chiseling was performed shortly after the subsoiling. Chiseling was done at a depth of 8 inches. The field was then disked on May 9th and cultivated on June 28th. Rodweeding was performed twice on July 18th and October 17th, following fertilization. On October 18th 75 lbs of N and 10 lbs of S were applied. On October 20th Hyak club wheat was drilled into dry soil dust with deep furrow drills at 10" spacing. Data
Conclusions Extremely droughty conditions experienced this year showed very little advantage to the subsoiling practice. The subsoiled plots averaged .25" more moisture in the 2nd and 3rd foot than the chiseled plots at seeding time. Over two inches plus of moisture was lost during the summer fallow year. |
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