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Roseville Soils Testing Annual Report: Year 1 <br />December 29, 2022 <br />Page 2 <br />Soil Testing Results <br />Soil testing occurred after one spring thaw (June) and after one year (October). Fertility and health tests were sent to two <br />different labs: The University of Minnesota and Ward Labs (Nebraska). Soil structure, color, and plant growth were <br />observed in the field. Infiltration testing was also completed in the field. <br />Soil Organic Matter: <br />Minnesota Lab - Loss on Ignition (%) <br />Site <br />Site Description <br />vegetation <br />management <br />10/15/2021 <br />6/13/2022 <br />10/10/2022 <br />1 <br />swale <br />native <br />2.7 <br />2.5 <br />2.6 <br />2 <br />swale edge <br />turf <br />2.0 <br />3.7 <br />3.1 <br />3 <br />1 top of berm - compost <br />native <br />2.8 <br />2.9 <br />3.1 <br />4 <br />top of berm - CONTROL <br />native <br />2.2 <br />2.4 <br />2.2 <br />5 <br />toe of slope - compost <br />turf <br />3.8 <br />4.2 <br />5.8 <br />6 <br />toe of slope - CONTROL <br />turf <br />3.0 <br />3.2 <br />3.2 <br />Percent organic matter is considered good for plant establishment at 3%. <br />Compost's presence tends to be fleeting and we did not expect to measure a change in organic matter until after three <br />years. That said, the trends seem to indicate a greater increase in organic matter in areas with compost top -dressing. <br />Soil Structure & Color: <br />Topsoil is variable here, depending on the composition and mixing with the fill materials. Sandy Loam topsoil had loose <br />single grained structure and loam topsoil had strong blocky structure. A drought in the last half of summer dried the soils <br />a lot, baking the loams into strong blocky bricks and causing the sandy soils to collapse around the holes. It is hoped that <br />continued composting efforts will lead to moderate granular structure in any soil texture. <br />Change in soil color was not observed after one year. Topsoils remained at 10YR 3/2 or 10YR 2/2 in the Munsell Soil <br />Color Book (very dark grayish brown or very dark brown). Soil color change might not be detectable in the three year <br />study time -frame. <br />Page 34 of 69 <br />