Subsoil moisture survey shows improvement in NWI


November 23, 2023


A cloud of dust trails a combine south of Hartley as the farmer harvests a soybean field in early October. According to ISU Extension & Outreach, autumn rains helped recharge subsoil moisture levels compared to spring totals.

Iowa State University Extension and Outreach field agronomists have completed their fall survey of subsoil moisture in northwest Iowa. Eighteen locations were sampled, according to Agronomists Gentry Sorenson and Leah Ten Napel.

"The sites were selected for being typical for the major soil type," Ten Napel said in a news release. "Each site that was selected has little or no water run-on and no ponding. A 40-foot by 40-foot area is designated for sampling at the locations, and GPS helps ensure sampling is done at the same location each spring and fall."

Results from the fall 2023 sampling i...

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