Edge-of-field water quality monitoring in two Wisconsin Watersheds quiz
Watch the webinar recording first on
, then take this quiz. Certified crop advisors who receive passing scores of 3 or higher are eligible to receive 1 CEU in Soil & Water Management.
When did Discovery Farms witness the most soil loss on site DR1?
Continuing from question 1, why might this be?
June is a time when there is not much cover on the soil.
Large storms with more than three inches of rain in a short period of time happened every year.
DR1 did not plant any cover crops.
Discovery Farms witnessed big differences in soil losses between sites DR1 and JV2 and JV4, but did not see a large difference in average annual phosphorus loss between these sites. Why was this?
Soil loss and phosphorus loss are not related.
Dissolved phosphorus is not accounted for in soil loss. DR1 uses some tillage and had lower dissolved phosphorus losses but higher soil losses and JV2 and JV4 did not use tillage and had higher dissolved phosphorus losses.
JV2 and JV4 used cover crops which increased dissolved phosphorus loss.
In the larger Discovery Farms dataset, what are the two main reasons we've seen dissolved P loss?
Soil does not have enough biological activity and P concentration at the surface.
P concentration at the surface and high soil losses.
High soil losses and timing of manure applications.
P concentration at the surface and timing of manure application.
What did Amber mention as good tool to gauge your risk for runoff?
Local weather station
Runoff risk advisory forecast
USGS real time data tables
The volume of runoff from the urban site Discovery Farms monitored was quite a bit higher than the ag sites. However, similar lb/ac of soil and nutrient losses were witnessed. Why was this?
Losses from the city were similar to those from the ag sites because an abundance of soil from construction in the urban area was observed.
Losses from the city were similar to those from the ag sites because concentrations of soil and nutrients from the ag sites were lower.
Losses from the city were similar to those from the ag sites because concentrations of soil and nutrients at the city site were lower.
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