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AgriLife Extension forage sorghum hybrid trial has special purpose

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By: Kay Ledbetter

Data to be used for farm bill loan deficiency program

Writer: Kay Ledbetter, 806-677-5608, [email protected]
Contact: Dr. Jourdan Bell, 806-677-5600, [email protected]

AMARILLO – More than 100 forage sorghum hybrids from 13 commercial companies across the U.S. growing in a Texas A&M AgriLife Extension Service production trial have a unique role to play, according to an AgriLife Extension specialist.

The Texas Panhandle Forage Sorghum Silage Trials will be utilized for farm program purposes. (Texas A&M AgriLife Communications photo by Kay Ledbetter)

In addition to forage yield and quality, the field trial on the Michael Menke farm east of Bushland will help evaluate the eligibility of sorghum varieties for the U.S. Department of Agriculture’s Farm Service Agency management assistance loans and loan deficiency payments based on grain yield and forage type, said Dr. Jourdan Bell, AgriLife Extension agronomist in Amarillo.

The Texas Panhandle Forage Sorghum Silage Trial conducted at Bushland historically has been used by the Farm Service Agency, or FSA, to update grain sorghum eligibility tables.

“This is the second year we’ve had this trial with Mr. Menke, which has allowed us to evaluate the hybrids under center pivot irrigation and managed for maximum production,” Bell said. “We have 100 different hybrids, and there are three replications of each, so it’s definitely a very big trial.”

 

Dr. Jourdan Bell, Texas A&M AgriLife Extension Service agronomist in Amarillo, discusses forage sorghums during a recent field day. (Texas A&M AgriLife Communications photo by Kay Ledbetter)

“Last year grain yields were not collected from the trial, but they will be this year if requested by the company in order to update existing eligibility tables,” she said.

FSA characterizes sorghum in five classes: dual purpose having a yield potential equal to 100 percent of a hybrid grain variety; dual purpose having a yield potential equal to 80 percent of a hybrid grain variety; sterile; photoperiod sensitive and ineligible varieties.

Forage-only varieties are not eligible for loans, only loan deficiency payments, unlike dual-purpose varieties that are eligible for both, Bell said. Sorghum varieties are further categorized to determine their eligibility according to tannin or non-tannin and grazing or grain use.

Bell said the trial at Bushland also includes three varieties planted at different populations. The population for the larger trial was 100,000 seeds per acre, based on longtime research data. But the three selected varieties were also planted at 75,000 seeds per acre in order to evaluate performance and lodging at a lower population.

Producers check out the forage sorghum hybrids from 13 commercial companies growing in a Texas A&M AgriLife Extension Service production trial near Bushland. (Texas A&M AgriLife Extension Service photo by Dr. Jourdan Bell)

“Based on previous data, 100,000 seeds per acre is a good planting rate to optimize production, especially under irrigation, but there is the potential to enhance lodging with certain varieties. We realize that this is not a recommended population for many varieties, but we are trying to maximize production,” she said.

Bell said the trial has only received about 4.5 inches of irrigation this year due to the rain received from May through July. The field received 12.4 inches of rain since planting on June 24, but there has been 25 inches of rain since May 1. That was one reason for the late planting date – the field was under water much of the time until late June.

“We’ve had really good weather pushing this sorghum along,” she said.

But on the down side, Bell said the trial has been hit by sugarcane aphids and has been treated once.

Harvest is underway, but it will continue through next month as every hybrid is harvested for silage when it reaches soft dough, she said.

“With the forage sorghum silage, it is critical that we optimize harvest time for quality. Silage pit management and end-use quality is strongly affected by harvest stage,” Bell said.

“If the silage is harvested prior to soft dough without additional drying, increased moisture contents can result in amplified butyric acid levels in the silage pit, which reduces palatability. When harvest is delayed to hard dough, moisture is often less than 60 percent, which results in poorly packed silage pits and poor fermentation.”

She said with all the dairies, the forage sorghum silages are a great fit for this region because they can be produced with about half the water as corn silage.

“One of the things we have seen is quality varies among varieties. There are some brown mid-rib varieties that are very good and some that aren’t, the same with non-BMR varieties. That’s why this field trial is something really great to see and have everything in the same location to look at.”

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Farm & Ranch

What to expect when your cow’s expecting

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Overweight cattle and cattle turned out on lush legumes with high concentration are at risk as well. In this case, an epidural anesthetic is usually necessary. The tissue will need to be replaced and sutured in place. Vaginal sutures will need to be removed prior to calving.

Toxemia happens when cattle are exposed to low nutrition during the last two months of pregnancy. Cows that are overly fat and/or carrying twins are at higher risk. Cows with toxemia become depressed, stop eating and often stand off away from the herd. You will notice some have the scent of acetone on their breath. As the condition worsens, the cow may develop muscle tremors. Treatment for toxemia is IV glucose, B vitamins or propylene glycol given by oral drench.

During calving there are a number of problems that could occur. Those include dystocia, bruises and lacerations to the birth canal, uterine prolapse, milk fever, retained placenta and grass tetany.

            According to the Beef Cattle Handbook, a product of Extension Beef Cattle Resource Committee Adapted from the Cattle Producer’s Library, at any time a cow is unable to deliver her calf, a dystocia has occurred. There are many things a producer can do to reduce this incidence. With heifers, lot those with small pelvic areas before breeding. Select bulls based on their birth weight, not on their relative size. Ultimately use bulls that will produce small birth-weight calves. When calving first-calf heifers separate them from cows, at best into small groups. Producers will want to provide surveillance over the heifers on a 24 hour basis. Some tips include restricting the calving to 42 to 60 days. That will enable personal focus for a short, intense calving period. Also feeding at night between 9 and 11 p.m. will cause more animals to calve during daylight hours.

            If problems arise and a cow hasn’t shown progress in 60 to 90 minutes, it’s time for the producers to step in. Signs of an abnormal delivery are the head only, the head and one leg, one leg alone or the tail. At this point it is best to contain the animal in a squeeze chute or small pen. A calf can only deliver one of two ways: both front feet followed by the head or both back feet out together. Once constrained, using ample lubrication, a producer can reach in and move the calf to one of the two correct positions. If unable to do so, a veterinarian should be called. The top problems include not getting the head out with front feet, having a calf too big to deliver through the mother’s birth canal resulting in hip lock and abnormal breach in which the tail is the only part of the calf visible through the vulva. If all goes well and pulling the calf is suggested, direct traction down and away from the birth canal. Do not pull straight out behind the cow. If two men are unable to pull the calf using the OB chains or when using the calf puller, do not use excessive force. It will not deliver the calf. Odds are the cows birth canal is too small for the calf and will result in a c-section.

            Keep in mind bruises, lacerations and rupture of the birth canal are possible during a difficult birth. Rough handling of the calf or maternal tissues and careless use of obstetrical instruments during calving add danger. This is typical when a cow is in labor several hours with a dry, non-lubricated birth canal.

Cows with difficult delivery and trauma to the tissue and birth canal may have damage to the nerves and spinal cord or hips that supply the legs. This results in abnormal leg function. In some cases, while pulling a calf, excessive force was used and the middle lower pelvis bones were fractured. At this point steroids are administered to help with swelling and nerve healing. In bad cases were the cows are unable to stand, they need to be hoisted to their feet twice a day.

            In older cows producers may see difficulty in birth injury or irritation of the external birth canal and severe straining, retained placenta and loose uterine attachment in the abdominal cavity called uterine prolapse. When noticed, this condition needs immediate action. Apply material to uterine wall to saturate fluid ASAP. You can use sulfaurea powder, urea powder or even sugar. Replace the uterus immediately or call your veterinarian. Without properly replacing the uterine horns, prolapse will reoccur.

            Usually the placenta is passed in three to eight hours. If the placenta hasn’t passed in eight to 12 hours of calving, the placenta is retained and the cows must be treated. A number of reasons lead to retained placenta: dystocia, c-sections, fetotomy, twinning or abortion along with other infectious diseases. Even feed deficiencies, malnutrition, low carotene, vitamin A, iodine, selenium and vitamin E can be to blame. To treat, use slight, manual force and gently pull on the placenta. If it resists, stop and pack the uterus with boluses or fluid douches to keep antibiotics in the uterus. As with prolapse, be sure to use proper hygiene when treating the uterus or worse problems will occur.

            Another condition parallel with cows with age, number of calves and dairy or mixed breeds is milk fever. This condition happens when a cow starting to produce milk is unable to remove calcium from her bones quickly enough. If blood levels of calcium fall below the minimal level, the muscles of the body are unable to function. This leaves the cow almost crippled, comatose and dead. High blood levels of estrogen inhibit calcium mobilization; this may be a factor on pastures that are high in legumes. Usually a slow administer of IV calcium is given. 300 to 500 ml of a commercial calcium solution is given over 20 to 30 minutes.

             Lastly, grass tetany poses as an issue to cows calving. It is similar to milk fever, but in this instance cattle have heavy post-calving lactation and lose large amounts of magnesium in their milk. Most types of mixed pasture grasses are low in magnesium. If cows are exposed to cold weather or stress during early lactation, their blood levels may drop low enough to cause grass tetany. At that point an IV of magnesium is given with calcium. Treatment is not as effective as with milk fever and in many cases, animals do not respond.  

This article was originally published in the January 2016 issue of North Texas Farm & Ranch.

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Farm & Ranch

Managing Show Cattle Through The Winter

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By Heather Welper

Husband and wife duo, Heather and Calvin Welper, are the Co-Owners and Operators or Two C Livestock, located in Valley View, Texas.

The pair’s operation has a show cattle focus where they raise and sell purebred heifers of all breeds and club calf Hereford steers.

When it comes to show cattle, the Welpers know a thing or two including how to prepare for the cold winter months and the Texas major show season run.

To read more, pick up a copy of the November edition of North Texas Farm & Ranch magazine, available digitally and in print. To subscribe by mail, call 940-872-5922.

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Farm & Ranch

Double M Ranch & Rescue

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By Hannah Claxton, Editor

As the sun rises each day, so do the dozens of mouths that Meghan McGovern is responsible for getting fed. Rather than the sounds of a rooster crowing, McGovern hears the bellows and bleats of a variety of exotic deer, the chortle of kangaroos, the grunts of water buffaloes, and the chirps of a lemur.

Nestled against the banks of the Red River, the Double M Ranch and Rescue, with its high game fences and deer sprinkling the landscape,s its in stark contrast to the surrounding ranches.

“Having deer is kind of like eating potato chips- you can never actually have just one,” said McGovern with a laugh.

McGovern has several herds to take care of- fallow deer, axis deer, water buffalo, goats, and bison. In smaller numbers, there’s also a few kangaroos, a lemur, a potbelly pig, a pair of zebras, a watusi, and a few horses.

To read more, pick up a copy of the November edition of North Texas Farm & Ranch magazine, available digitally and in print. To subscribe by mail, call 940-872-5922.

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