Person: Siobhan Danreis

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Fruit and vegetable farmers are exploring on-farm compost methods to lower their input costs, increase soil microbial diversity, manage waste and improve yields. Following up on a 2014 PFI study with Jason Jones and Siobhan Danreis,  Rob Faux (Bremer County) and Siobhan (Pocohontas County) held on-farm trials investigating the effect of compost extract on yield […]

July 7, 2016 

BLOG POST

Objectives: 1. Determine if bi-weekly soil drench applications of compost extract affects yield of lettuce and/or carrot. 2. Determine if bi-weekly soil drench applications of compost extract affects deg. Brix of lettuce and/or carrot. 3. Inform best practices for storing compost, steeping extract, and applying extract drench to soil.

July 7, 2015 

RESEARCH PROTOCOL

Compost extract (compost steeped in water, then sieved) is a popular soil amendment to increase beneficial biota and increase yields. Two treatment levels of compost extract were applied to carrots on two farms to determine impact on yield and soil microbes.

KEY FINDINGS:
• Compost extract did not impact carrot
yield at either farm.
• Compost extract did not impact soil
biota (as measured by a Qualitative
Soil Analysis).
• Carrots from the High compost extract
treatment at Jason Jones farm were
significantly longer than untreated
plots.
• Carrots from the plots treated with
compost extract at Siobhan Danreis’
farm showed significantly higher
degrees Brix.

December 7, 2014 

RESEARCH REPORT