10 - 2020 Soybean Management Field Days - Interseeding Annual Ryegrass and Wheat into Soybean
Interseeding Annual Ryegrass and Wheat into Soybean - Chris Proctor, Nebraska Weed Management Extension Educator discusses the field demonstration evaluating soybean variety, herbicide timing, and soybean population on V3 interseeded annual ryegrass and wheat cover crops
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[00:00:07.100]Chris Proctor, Weed Management Extension Educator at UNL,
[00:00:12.440]just a chance to highlight some of the field studies
[00:00:14.370]we were doing this year
[00:00:15.203]for our Soybean Management Field Days,
[00:00:16.910]and so this was looking at drill interseeding into soybean.
[00:00:20.850]And the way we set this up
[00:00:21.840]is we had two varieties of soybean,
[00:00:24.710]both were maturity group three,
[00:00:25.830]but one was a taller statured soybean,
[00:00:27.730]the other one was a shorter statured soybean.
[00:00:29.680]And if you look behind me, you can pick it out.
[00:00:32.280]So you can see that the beans right behind me,
[00:00:34.320]these are the taller statured beans
[00:00:36.851]and then just over to the side here,
[00:00:39.790]it shifts to the shorter statured beans.
[00:00:42.102]They aren't dramatically different,
[00:00:43.840]but the idea was we were trying to capture
[00:00:46.400]a little bit more sunlight in the shorter statured beans,
[00:00:49.820]hoping that that canopy might stay open
[00:00:51.430]just a little bit longer
[00:00:52.470]to give us just a little bit more opportunity
[00:00:56.052]for the cover crop that we drilled to establish.
[00:00:59.490]So both of these are at 100,000 population,
[00:01:02.130]so we tried to thin the population down a little bit
[00:01:04.470]from the typical rate, again,
[00:01:07.110]seeing if we could capture just a little bit more sunlight.
[00:01:12.140]One of the things that I'll point out
[00:01:13.610]is you can see here outside of the plot,
[00:01:16.740]you can see the drilled rows,
[00:01:18.140]so the wheat that actually came up
[00:01:20.040]from the drill interseeder outside of the plot.
[00:01:24.100]But what's interesting to note is if you come into the plot
[00:01:26.530]just a little bit and you pull the canopy back,
[00:01:31.830]we do have a little bit of wheat in here,
[00:01:34.540]but a lot of it has died out
[00:01:36.870]and it hasn't established real well,
[00:01:38.410]and so with this taller statured soybean,
[00:01:40.590]the canopy's pretty dense
[00:01:41.870]and we didn't get really good establishment.
[00:01:44.210]The other thing that we are noticing
[00:01:45.620]is that there is a difference between our herbicide program.
[00:01:50.190]And so we had a pre-emerge herbicide on half the plot
[00:01:53.260]and no pre-emerge herbicide on the other half,
[00:01:55.160]and it's looking like,
[00:01:56.350]and we'll see how the data shows at the end of the year,
[00:01:58.120]but it's looking like
[00:01:59.450]where the pre-emerge herbicide was present,
[00:02:02.470]we had a little bit poorer establishment of our cover crop.
[00:02:05.520]And so that's just, again,
[00:02:07.000]a factor to take into consideration.
[00:02:09.690]So here at the other end of the plot,
[00:02:12.030]this would be in the short statured soybeans,
[00:02:13.730]and this is the area
[00:02:14.660]that didn't have the pre-emerge herbicide present,
[00:02:17.390]and so you can see that we did get
[00:02:19.900]a little bit of establishment of this wheat,
[00:02:21.600]and so it'll be interesting to follow this now
[00:02:23.350]through the rest of the season.
[00:02:25.670]The hope is that we had enough establishment,
[00:02:27.680]enough growth on this wheat,
[00:02:29.140]and maybe just enough light is still getting through
[00:02:31.538]that this wheat will actually survive into the fall,
[00:02:33.910]and so we'll track this into the fall
[00:02:35.380]and see what kind of biomass that we actually accumulate.
[00:02:37.680]But there are some differences out here.
[00:02:40.160]It'll be fun to see how these work.
[00:02:43.030]By and large, it's a challenge doing this in soybean
[00:02:45.730]'cause we have such a dense canopy
[00:02:47.080]and soybean compensates so well to lower populations
[00:02:50.019]and things like that,
[00:02:51.440]and so we're still trying to tease out
[00:02:53.160]how effective this could actually be in soybean.
[00:02:55.050]But again, differences in canopy, differences in population,
[00:03:00.190]herbicides are all factors that we're looking at
[00:03:02.670]to see how those might affect the establishment
[00:03:05.030]of these drilled cover crops in the soybean.
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