I learned so much just by visiting the Red Cedar
Demonstration Farm last week. One thing is learning about conservation
agriculture through a textbook and another is seeing it right before your eyes.
I thought I knew what no-till farming was until I saw what no-till farming
really is. I was in awe. I never thought about how even if a field had been
converted into no-till for a couple of years’ the soil still showed signs of
compaction. It was still so compacted that even after 10 minutes of water
sitting on top of it, it would not percolate down. John Sippl, the district conversationalist, shoveled
out 7-inches of soil and we all were able to see the layers of compaction. I
was under the impression that no-till would have fixed this but John explained
how no-till is used to mitigate erosion. No till serves as a method to grow
crops without disturbing the soil thus decreasing erosion but in order to
decrease this compaction, John explained how cover crops roots adds complexity
to the soil structure which leads water to percolate into the soil easily as
well as lessen erosion too.
What I learned at the farm ties to the work I am doing this
summer, Elizabeth and I have spent about a week preparing maps on land cover,
slope, and stream accessibility. These maps will help us pick potential study
sites to do field work in. An aspect of our project is to map vegetation
buffers along secondary streams close to Menomonie as well as access water
quality. The way we would do this is by flying a camera attached to kite over
these areas to capture the conditions below. The reason we are interested in
the presence of buffers is due to erosion. I learned at the farm that the speed
of a falling raindrop can be more than 20 miles per hour. Its impact is reduced by any type of plant matter before it hits the soil. If there is no plant matter,
then soil particles can be dislodged from the ground and would be free to run
off into the local stream if there is no vegetation buffer present. I expect to
learn about the physical condition of streams throughout the summer.
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