Fresh from the field where we have been testing our next-gen machine. We’re excited about the potential for using the new machine’s tracks to increase soil-seed contact, a key factor influencing cover cropping success. Shown in the video is one solution we are testing where we’ve added cleats that should help work the seed into the soil more than the tracks alone. We’re collaborating with Prof. Scotty Wells at the University of Minnesota on this project that’s funded in part by the Walton Family Foundation.
The Rowbot platform is ideal for seeding cover crops late summer / early fall into tall corn. Take a look at the results of a fun project inspired by Grant Wyffels.
We have several field trials underway in Minnesota, Iowa, and Illinois. Our goal with these innovative trials is to push the envelope on driving farmer profitability by adjusting the timing and rate of nitrogen applications. Look for more on the results after harvest in October / November.
Here's a video of our prototype machine applying nitrogen on a field in north-central Iowa. The machine is traveling at just under 4 mph, and I'm chasing after it with one hand in the air holding my phone to capture video and the other hand holding the throttle down. As the "safety driver" this summer, I logged many miles in this manner--usually with my spare hand keeping corn leaves out of my face.
The self-driving tech is keeping it nicely centered in the row. Note that the white GPS receiver stands at six feet off of the ground.
And another video as I wrapped up a long day treating 30 8-row strips (300 feet long) on each of two fields at our test location in Rosemount, MN.
At ROWBOT, we are driven to increase farmer profitability by reducing input costs and boosting yields. It has become clear to us that a management plan with multiple in-season nitrogen applications is the ticket to using this costly input efficiently. Our goal is to make these in-season nitrogen applications easy and extremely cost effective.
During the 2016 growing season we carried out two nitrogen strip trials in collaboration with Shannon Gomes (Cedar Basin Crop Consulting), who connected us with a couple of progressive growers in NE Iowa.
For the field data shown here, we had three treatments replicated three times in strips that were about 1200 feet long. We are indebted to Clark McGregor, who took care of the early nitrogen applications and harvested the strips.
Treatment A was the farmer's normal treatment--most of the nitrogen was applied during mid June. We added a second in-season nitrogen application for treatments B and C. Based on the Adapt-N model, the recommended application for B and C on July 1st was about 35 lb N/acre. We decided to have the B treatment at 60 lbs/acre and the C treatment a bit lower than the Adapt-N recommendation at 30 lb N/acre.
The harvest data are in, and the results are quite impressive! Even with 15 lb N/acre less in treatment B, the measured yield was slightly higher than the control--treatment A (statistically, there's not a difference between the yield of treatments A and B given we have just one set of strip trials). Surprisingly, treatment C that had a whopping 45 lb N/acre less than the control had only a slightly lower yield (the difference is only marginally significant).
The addition of a second in-season nitrogen application meant that we gained about two weeks of additional insight into the season before the final nitrogen application was needed. Plus, not all of our nitrogen was on the field during late June, which was a fairly wet period (see comparison to other seasons below).
We are making plans for an expanded set of field trials for the 2017 growing season that should further underscore the value growers can realize through multiple, in-season nitrogen applications using the ROWBOT platform.
Earlier in 2016, the team behind Beck's Practical Farm Research (PFR) reached out asking if we could take part in a seeding trial. That led us to the outskirts of Indianapolis during early September to lay down cover crop seed using the ROWBOT platform.
As is outlined in the great video (below) produced by the PFR team at Beck's, they wanted to compare results from a simulated aerial application, seeding with a drill after corn harvest, and a high-quality broadcast seeding by our ROWBOT platform.
They'll be collecting data and imagery from the trial, which we'll post here. Sounds like the stand resulting from the ROWBOT is quite uniform compared to the simulated aerial seeding. As expected, the drilled seeding is very uniform, but its growth was delayed by several weeks given that they had to wait to do that seeding until after the corn was harvested.
Last week, I did some cover crop seeding at the Fitzgerald farm in central Minnesota. Those are young red clover plants that were seeded on Sept. 19th, photographed yesterday, less than two weeks later. If you are used to looking at photos on our site, you'll notice some vegetation (a.k.a. weeds) on the ground between corn rows, which is typical in an organic operation (incidentally, removing weeds on large organic fields is a big opportunity, which is a good match for robotics).
Yesterday, I was able to grab a couple of videos while chasing the machine at 4 mph (a very fast walk on the relatively uneven terrain of a typical field). Enjoy!
Just back from a few hours of seeding cover crops at our test site on the University of Minnesota's Research and Outreach Station in Rosemount, MN. Once again, we're collaborating with Prof. Scotty Wells, who has a number of other cover crop studies underway. This is also part of the New Agricultural Bioeconomy project at the U of MN, which has received funding from the U's MnDRIVE initiative.
With this study, we are testing the impact of planting date on cover crop biomass. Why? Well, it's tough to get a successful cover crop following corn if one waits until after harvest, which may occur just before the snow starts to fly. Being able to get the cover crop established at the end of the summer or early fall helps it get established well before the onset of winter. The ROWBOT way, so to speak, is to get in when corn is mature and lay down cover crop in a best-of-class broadcast application. This study is designed to confirm what is logical: an earlier planting date should yield a more robust cover crop with more biomass, which is a decent proxy for the soil health benefits provided by cover crops.
We planted a round of plots today (9/15), and another set of plots two weeks ago (9/1). There will be one more planting date around the middle of October. Last year's initial study, while not as rigorous as this year's, suggested that less biomass results from later planting dates. That makes sense, and it is the reason we're working hard to commercialize the ROWBOT technology so that we can seed cover crops on millions of acres long before corn is harvested!
Check out the photos from today of the cover crops seeded two weeks ago. Note that there were a few rain events after planting (over one inch on 9/6 and another half inch on 9/7).