Archive for the ‘Soybeans’ Category
Posted by romeethredge on November 16, 2015
Posted by romeethredge on November 5, 2015
The Kudzu bug hasn’t seemed to be as big a deal in soybean fields as we thought it would have been. I saw a good poster at a meeting this week concerning this and I have it below, thanks to Jennifer Miller. This is likely part of the reason they haven’t been a terrible problem for us.
The bad news is , I thought we would be getting a lot of natural control of Kudzu vines with this bug but it may not happen.
Posted by romeethredge on October 27, 2015
Dryland or you could say rainfed soybeans are a risky proposition especially in sandy soil. Soybeans need water when they need it for a good crop. Dryland yields in Georgia range from 5 to sometimes 50 bushels per acre and the main reason for this variation is water. Drought during the critical fruiting period really hurts yield.
Local grower, Adam Hopkins, grew some pretty good soybeans this year without irrigation as you can see here. He will harvest them next week when it dries off.
He said he got rain at the right times, on some fields.
Posted by romeethredge on September 29, 2015
We are seeing some Downy mildew in several crops. I’ve seen it in vegetables and now in soybeans. It’s not usually a real problem in soybeans but it can be bad in vegetables.
Here’s how the underside of the leaves look, with some fungal growth.
Posted by romeethredge on September 18, 2015
I was surprised this week when asked to look at some soybeans , I got to the field and the grower, Brad Trawick, said he was growing them for forage.
I said, “You mean for cow feed?”
They look real good. We have some photos here.
Forage soybeans are typically harvested for hay or silage; however, they can be used for late summer temporary grazing. Since they do not regrow once defoliated, strip-grazing (or frontal grazing) is the most efficient use. Soybean forage is fairly digestible (up to 60 percent) and moderately high in CP (17 to 19 percent). Stem size can be reduced, thus increasing digestibility, if seeding rates of 90 to 120 lbs. of seed per acre are used.
Planting late-maturing varieties (maturity groups 6, 7 or 8) from early May to early June will result in forage soybean production best suited for high yields. Shorter periods of growth, such as part of a double- or triple-crop system, can be accommodated with early-maturing varieties. However, productivity is expected to be substantially less.
Dr. John Bernard,UGA Scientist, has the following advice. Forage soybean can work as silage and the leaf loss is significantly reduced, but the sugar content is limited making it harder to get a good fermentation. Certainly would benefit from using an inoculate when ensiled.
Soybeans has been one of those crops that gets some attention and then seems to fade away. Some have had good yields but others have not been satisfied with the yield compared with millet or sorghum.
It’s good to get a forage analysis (CP, NDF, NDF digestibility, fat, and minerals minimum)
If used for hay it make a good hay that’s high in protein. It’s a challenge to let it dry enough so that it doesn’t go through a heat and even catch fire, but you need some moisture in it or you will loose the leaves and not get them into the bale. If it’s baled too quickly after cutting then it can heat up and the proteins can be bound and it won’t be as good a feed. A hay preservative such as Potassium Sorbate may be used to help with this problem. Using a mower that crimps the stalk will help, too. The stalk is often the hardest thing to get dry.
Perhaps mixing an annual grass with the soybeans when planting to help get the leaves into the baler without loosing them on the ground may help.
Posted by romeethredge on September 11, 2015
Here is Greg Mims with some full season soybeans that are looking good. They are irrigated and have been well cared for. Caterpillars had to be controlled and a protective fungicide and foliar Boron have been applied. Now we will watch for any problems but mainly for stink bugs and other pod feeders. They are in a critical stage for water as well.
These soybeans are in the R5 (begining seed) stage , they will soon be at the Full pod or R6 growth stage. Flowering and therefore podding occurs first at the bottom of the plant and moves upwards. For purposes of naming the current growth stage, we only look at the 4 top nodes of the plant through stage 6 so we all stay on the same page.
Posted by romeethredge on September 2, 2015
Asian soybean rust has finally been found in Georgia in 2015. The disease was found on soybean leaves from sentinel plots in Attapulgus, Decatur County. Asian soybean rust has been slow to develop in Georgia and Alabama this year, but has been found scattered throughout Mississippi.
Dr. Bob Kemerait, UGA Extension Plant Pathologist says, “Any soybeans that have reached full seed/R6 growth stages are “safe”. Younger beans (especially those in early pod development stages in the southern part of the state) are still vulnerable to the disease. With recent rainfall patterns and cooler temperatures, the disease could begin to spread more quickly.”
Posted by romeethredge on August 14, 2015
Here are some ultra late soybeans planted after corn harvest that are looking good. Herbicide controls worked well and fields are looking very green where before they had the tan old corn field look. Caterpillars have been in some fields but not all, some lesser (LCB) problems, especially in burned fields. There have been stand problems in some fields and some replanting has occurred.
We need to watch fields closely for problems and keep them wet and growing for this is a short season crop.
You can see that these plants are in their 2nd or third Trifoliate leaf stage, V2 or V3. This is important to notice due to some herbicide application times. In some cases the soybean plants need to have trifoliate leaves in order for certain herbicides to be applied.
These soybeans below are younger and they are in the unifoliate (VC) stage. I guess unifoliate is kind of like unicycle… single leaf…single wheel. The next leaf to come on the soybeans will have three parts to it or trifoliate.
Posted by romeethredge on July 16, 2015
Ultra late soybeans after corn are being planted now and getting them in early will help yields. Here are some links to past information I’ve posted about this subject.
Here’s some good information from UGA Soybean and Cotton Scientist, Dr. Jared Whittaker, concerning Ultra Late soybeans. Some of these charts represent only one year of data and so we know we could get different results if averaged over several years however it’s still good information and these results follow what we’ve experienced.
It’s important to know that in some years we don’t get these yields. Weather affects this a lot.
Posted by romeethredge on July 10, 2015
Nematodes can be a problem for many of our crops including soybeans. Here’s some brought in to me this week with a real problem. You can see the leaves showing the stress and nutrient deficiencies due to the impaired root system.
Now, in looking at the roots you can see the Nitrogen fixing nodules, these are good, they are stuck to the side of the root. What we don’t want to see is the root swelling and knoting that we see, too. Most of what’s toward the top are nodules and nematode damage towards the bottom.
Here my finger is behind some of the good nodules.