Farm & Ranch
Texas crop, weather report for Aug. 11, 2015
By: Robert Burns
Triple-digit temperatures stressing beef cattle and calves
Writer: Robert Burns, 903-834-6191, rd-burns@tamu.edu
COLLEGE STATION – As temperatures reached 100 degrees and above, the stress on beef cattle increased, said Texas A&M AgriLife Extension Service experts.
Though there are no reports of large death losses yet, the stress does affect beef cattle health and certainly reduces their feed efficiency and daily gains, both on pastures and in the feedlots, the experts said.
“The really high temperatures we’ve had the last several weeks have caused cattle to undergo a lot of heat stress,” said Dr. Joe Paschal, AgriLife Extension livestock specialist, Corpus Christi. “Typically, cattle are going to shade up a lot more, particularly if they are black-hided rather than if they are of Bos indicus or Brahman influence.”
Download or preview this report as a two-minute MP3 audio file
If these measures aren’t enough, then they will start showing physiological signs of heat stress, he said. Cattle mainly cool themselves by panting. Bringing in cool, moist air will allow them to lower their core temperature, and by turn, their outer body by increasing the amount of blood to their hides.
“If they can bring cool air into their lungs, that’s fine, but they can’t now,” Paschal said. “They are bringing in air that’s at 100 degrees and at very low humidity, and it’s making them even hotter. This affects their entire metabolic process. It’s even harder on feedlot cattle as they’re fatter.”
Dr. Ted McCollum, AgriLife Extension beef cattle specialist, Amarillo, said it is true that feedlot cattle are more susceptible to heat stress. This is because they are generally fatter or “fleshier,” and the fat acts as an insulator, making it harder for them to dispel heat by convection.
However, he hasn’t heard that many reports on death loss this summer, he said.
Of the 120 or so feedlots that finish cattle in Texas, Oklahoma and eastern New Mexico, most are in the Texas Panhandle, McCollum said. And one of the several reasons that most confined cattle feeding units are there is because of the climate.
“The one thing about this part of Texas as compared to South Texas, or farther north in Nebraska where you hear about death losses from heat stress in feed yard cattle, is that we do cool down at night,” McCollum said.
The cooler nighttime air means cattle in Panhandle feed yards have the chance to “unload” that heat at night.
This isn’t to say that some cattle in Panhandle feed yards haven’t suffered health problems during the past several weeks, but to his knowledge there haven’t been any large-scale problems, he said.
Some performance losses have occurred because of reduced feed consumption during the hot weather. Digestive processes generate body heat. So in response to hot ambient temperatures, cattle will often reduce feed intake in an effort to reduce their heat load, he said.
AgriLife Extension district reporters compiled the following summaries:
Coastal Bend: Some parts of the region had not received rain for nearly four weeks. Others got a few scattered showers, but nothing significant. The dry conditions helped farmers get some crops harvested, but some had to irrigate soybeans and cotton. The dry weather was expected to reduce the yield potentials of soybeans and hay fields. Many producers were taking a second cutting of hay, but grass regrowth was slow to non-existent due to lack of topsoil moisture. The corn and grain harvests should be completed by the middle of August. Rice was starting to arrive at grain elevators. Livestock owners were checking water sources daily to assure all livestock had adequate water. Cattle were generally in good condition, but more calves were being shipped as forage supplies began to wane.
East: Most counties reported temperatures above 100 degrees, along with dry and windy conditions. All counties needed rain. Pasture and hay fields were showing drought stress. There was a general browning of all grasses, and a great reduction in regrowth. Producers who had overstocked their pastures were beginning to run out of grass. Soil moisture continued to dwindle. Most counties rated topsoil as short, with several rating it as very short. Burn bans were being issued throughout the region. Many Anderson County oak trees were dying. Vegetable harvesting was nearly over. Some truck farmers were preparing for fall planting. Pond and creek levels were dropping. Cattle were in good condition. Weaning and selling of market-ready calves and cull cows continued. Some producers were supplementing livestock with protein. Horn flies continued to be a problem. Feral hogs were on the move, rooting up pastures and lawns.
Far West: The entire region had temperatures well above 100 degrees. A few counties received measurable rainfall. Dryland cotton in Glasscock County was showing signs of heat and moisture stress. Cotton in most other counties was in good condition, at full bloom and setting bolls. Corn was in fair to good condition. Alfalfa growers were taking a fourth cutting. Pecans looked good. Sorghum crops were in fair condition. Pastures and rangeland were beginning to dry out but were in fair to good condition. Subsoil and topsoil moisture ranged from adequate to short. Cattle were generally in good condition. Calves and stocker cattle were gaining weight.
North: Temperatures reached 100 degrees every day. Topsoil moisture was short to very short. The ground was cracking in many places, and pastures were drying out very quickly. Producers continued to harvest Bermuda grass hay and annual forage sorghum. Corn and grain sorghum were maturing very quickly, with harvesting likely to begin in the next week or two. Yields of both crops were expected to be below average as both were planted late due to excessive rain during the spring and early summer. Soybeans were struggling with the heat. Sunflowers looked good in some areas but were stressed in others. Livestock were in good condition for August but were seeking refuge in stock tanks and waterways to stay cool. Flies and mosquitoes were abundant. Wild hogs continued to cause damage.
Panhandle: The region remained hot and humid, with temperatures near normal for early August. Isolated areas received showers, from a trace to 3 inches. Grasshoppers were a problem throughout the region. Spider mites were being monitored in Deaf Smith County corn fields, along with sugarcane aphids in Hansford and Lipscomb counties. In Collingsworth County, the hot weather added much needed heat units for cotton and sped up the maturing of grain sorghum. Irrigators were watering cotton while the crop was setting bolls. Deaf Smith County producers were evaluating damage from the past storms. Several corn, sorghum and wheat fields were totally lost. Otherwise, Deaf Smith County crops were generally in good shape, with much of the corn in the milk to early dough stage. Grain sorghum was coming along well too, with early planted fields setting seed. Cotton was struggling as many fields were behind and needed more heat units. Gra sshoppers were particularly bad in Deaf Smith County, with many producers having already sprayed multiple times in an effort to control the invasion. Producers were concerned about planting early wheat until the grasshopper problem was resolved. In Hall County, extremely hot weather stressed crops and livestock. Hansford County received another 1.7 to 2 inches of rain. Weeds were becoming a big problem in some fields. Corn looked great, and some irrigation pumps were turned off to allow cutting of silage. Irrigated and dryland sorghum looked great. Irrigated cotton also looked very good. Dryland cotton stands were spotty in places. Lipscomb County reported sugarcane aphid infestations in grain sorghum. Randall County crops continued to progress after some rain. Wheeler County cotton was still behind normal development.
Rolling Plains: Summer heat hit the region, with high temperatures ranging from 100 to 107 degrees. The heat rapidly dried out topsoils but was good for most cotton, though some fields were showing signs of stress. Summer annual forages were being harvested. There were reports of sugarcane aphids on grain sorghum. Cattle were in good condition, and pastures were holding up, though some grasses were drying out quickly. Grasshoppers were still damaging trees and crops, but populations were declining.
South: Very hot and dry conditions were the rule throughout the district, and soil moisture levels were dropping. In some areas, there had been no rain for as long as six weeks. In the northern part of the district, corn and sorghum harvesting continued. Peanut development ranged from the flowering stage to setting pods. Cotton was opening bolls. Pastures and rangeland were drying out, but they generally were still in fair shape. Some producers were baling hay. Body condition scores of cattle remained good. In the eastern part of the district, most pastures still looked good despite the lack of rain, but producers expected they will have to provide supplemental feed to livestock soon if there is no rain. The grain sorghum harvest was underway with some producers reporting yields of 5,000 pounds to 6,000 pounds per acre. Small fires broke out in rangeland and pastures in Jim Hogg County. Cotton growers did not expect harves ting to begin in earnest until Sept. 1. Soil moisture in the eastern counties ranged from adequate to short. In the western part of the district, the continuing hot, dry weather meant producers still had to irrigate cotton, pecans and some late-planted sorghum fields. The harvesting of corn and sorghum was active. The availability and quality of native rangeland and pastures grasses further declined. Producers who had heavy grazing pressure on native rangeland had to provide light supplemental feeding. Cotton was making good progress. In the south part of the district, soil moisture was short. Producers were defoliating cotton, and the sugarcane harvest was ramping up.
South Plains: Temperatures were in the triple digits, which for some counties was a first for the year. Cotton development ranged from just beginning to bloom, with eight nodes above white flower, to physiological cutout with five or fewer nodes above white flower. The heat was generally good for cotton in helping it somewhat catch up on development. Floyd County cotton started to set bolls, and grain crops continued to look great. Hale County received timely, scattered showers that provided significant moisture in a few areas. Cochran County also received showers that improved subsoil and topsoil moisture. Peanuts there were doing very well. Sugarcane aphids were confirmed in grain sorghum, while cotton was impacted by fleahoppers and lygus bugs during the last few weeks. Lubbock County recorded its first official 100-degree day on Aug. 6. However, temperatures had been consistently near 100 for days, with higher than normal humidity. Spotty rain showers amounted to 0.5 to 1 inch of moisture. Cotton was stressed where no rain was received. Grain sorghum producers were closely monitoring widespread sugarcane aphid infestations. Some fields reached economic threshold levels for treatment. Garza County also received rain, from a trace to as much as 2 inches. Cotton continued to progress but needed rain to maintain development. Mitchell County had several 100-degree days. Rangeland condition declined, and the increased chances of wildfire became a concern.
Southeast: Soil moisture varied widely throughout the region, but was mostly in the adequate to short range, with short being the most common. Rangeland and pastures were mostly rated in fair to poor condition, with fair ratings being the most common. Temperatures were at or above 100 degrees. Soils and lowland areas were drying out. Pasture conditions were beginning to fade. In some areas, there had been no regrowth of grass after the first cutting of hay about three weeks ago. Corn was drying down very quickly. In Chambers County, early rice that did not have to be replanted was being harvested. Dry conditions made draining rice fields a hard decision, but the alternative was to chance plants dying and lodging. In Fort Bend County, the grain sorghum harvest was mostly finished. Yields ranged from 3,500 pounds to as much as 7,500 pounds per acre. The corn harvest began, with yields ranging from less than 100 bushels to as muc h as 240 bushels per acre. Cotton was progressing quickly, and some producers expected to begin defoliating within a week. Livestock were in fair to good condition.
Southwest: Hot, dry conditions persisted throughout the region with no rain reported. Temperatures have been in the high 90s to over 100 for weeks, which was cooking grasses and forbs. Burn bans were instituted in some counties. The grain sorghum harvest neared completion, and the corn harvest was in full swing. Pasture conditions continue to decline with hot and dry conditions. Hay yields have been very high, but most fields were already going to seed or becoming dormant. Cotton was doing well. Wildlife generally were in good condition. With pastures declining, due to the hot weather, livestock were showing signs of stress.
West Central: The region had triple-digit temperatures with no rain forecast. The continued hot, dry, windy conditions were drying out soils, pastures and stock-water tanks. Row crops were showing signs of heat and moisture stress. Some producers were preparing fields for fall planting, but many were waiting for a rain before beginning. The danger of wildfire was high and increasing every day. Cotton was maturing fast thanks to the hot days and warm nights. The grain sorghum harvest began. Hay harvesting continued, with many producers taking a second cutting. Some expected to get a third cutting. Grasshoppers were becoming an issue in some areas, and producers were applying pesticides. Rangeland and pastures remained in fair to good condition, but were beginning to show signs of stress. Livestock remained in fair to good condition. Calf weaning continued.
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Farm & Ranch
Grazing North Texas – American Lotus
Farmers and ranchers are in a very close partnership with Mother Nature. If we really pay attention, she presents us some interesting scenarios.
For example, though they are totally different types of plants, water lilies and prickly pear have a lot in common. They both have strikingly beautiful flowers, both plants are edible, both of them are invaders into their respective habitats, and too much of either one can be an obstacle that we have to deal with.
Many north Texas ranches rely on excavated ponds for livestock water. Any time a pond contains a significant amount of shallow water so that sunlight reaches the bottom, some type of pond weed will develop. The plant family that includes water lilies and lotuses is a common invader in our livestock water.
Water lilies and lotuses are in the same plant family but they are two separate genera. There are easy ways to tell them apart:
• A primary difference is that water lily leaves commonly float on the surface, but lotus leaves can grow above the water line.
• Water lily leaves and flowers are thick and waxy, while lotus leaves and flowers are thin and papery.
• Water lily leaves have a distinct notch in the leaf, while lotus leaves are more rounded.
• Water lily flower petals are pointed, and lotus petals are more rounded.
The photos attached to this writing are from Clay County, and this plant is common across north Texas. American lotus is adapted to a wide area, from Honduras north through Mexico and across the eastern US and into Canada.
American lotus is a perennial, and it is cold tolerant and heat tolerant. It can grow in any pond or slow moving stream that contains shallow water areas. It prefers water with a depth of about 12 inches. Germination can occur from the large lotus seeds. Tubers, or roots, are established in the mud, and long slender stems extend upward. Leaves and flowers are both emergent in that they grow above the water line.
Lotus flowers are fragrant, and yellowish white with rich gold centers. They open in the morning and close by late afternoon, then open again the next day.
Lotus is an edible plant and has a history as a food source. The large tuberous roots, the size of a human arm, were baked like sweet potatoes. The leaves were eaten like spinach, and the large seeds were ground into flour. Stems taste somewhat like beets and were usually peeled before being eaten.
There is a large world-wide industry of cultivating lilies and lotuses in water gardens. According to Dr. Jerry Parsons, Professor and Extension Horticulturist with Texas A&M AgriLife Extension, cultivation of these plants dates back as early as ancient Egypt. Today, anyone with determination and a little money can have a water garden.
In 2011, the 82nd Texas Legislature designated the water lily “Texas Dawn” as the official Texas State Water Lily. Texas Dawn is a hybrid developed by Texas resident Kenneth Landon, a world-renowned expert in the field of water lilies and the director of the International Water Lily collection in San Angelo.
Ducks and other wildlife utilize the large acorn like seeds of American lotus, and submerged portions of all aquatic plants provide some form of wetland habitat. Many of us have tried to pull a bass out of a group of water lilies or lotuses, and I’m sure others have had better luck than I did. Although there can certainly be benefits to lilies, lotuses, and other aquatic plants, they can also infest ponds to the extent that the pond is not functioning correctly.
So, while the rest of the world works hard to grow these plants, ranchers sometimes need to control populations in their stock ponds. Once it gets a foot hold, American lotus can spread aggressively in wetland areas.
The primary issue that encourages American lotus, and most other water weeds, is shallow water. Look closely at a good livestock pond and you will find that the deeper water is basically free of infestation. Any pond will have a certain amount of shallow water that encourages water weed growth, depending upon the terrain at the pond site and how the pond was constructed. Some ranchers who enjoy and utilize wetland habitat may prefer to have ponds with significant shallow water area.
Almost all livestock ponds have a certain life expectancy. Siltation, or movement of soil into the pond bottom through rainfall runoff, is a natural occurrence. How fast siltation occurs into each pond, and how deep the pond was to start with, determines the length of time that the pond will contain adequate depth for dependable water for livestock.
Ponds that develop infestations of water weeds over a large percent of the surface may not have adequate depth to remain a viable water source for livestock during drought periods, especially in western north Texas where evaporation rates are higher.
Mud, or silt, from the pond bottom, can be removed to deepen the water, but this is a very expensive process. It is often more economical to construct a new pond rather than try to remove the silt from an old one. Most of us do not have the funds to continually construct deep water livestock ponds, so we must try to keep existing structures functioning and providing good drinking water for livestock, for as long as we can. Control of pond weeds like American lotus may be necessary, and it can be accomplished.
There is currently no feasible biological control. American lotus can be cut and removed, but this process us usually temporary because lotus can reestablish from seeds and roots.
American lotus can be safely controlled by chemicals. This must be done carefully. If a pond containing a large amount of any pond weeds is treated to remove all of the vegetation, a fish die-off could occur. When the dying weeds decompose, they use up the oxygen in the water and fish can suffocate. If possible, treat only a portion of the area, wait about two weeks, and treat another portion.
Farm & Ranch
The Many Benefits of Rabbit Manure
By Landon Moore
Rabbits offer a lot to the home gardener, and perhaps the most useful of all is their waste. Rabbit manure is likely the single most versatile and valuable fertilizer of any animal manure. It’s a “cold” manure, meaning it can be applied directly to plants in any form without the risk of burning them. In contrast, manure from sheep, horses, cows, and especially poultry must be aged before it’s applied, or it may damage plants. Because rabbit manure doesn’t need to be aged, it retains more of its nutrients and is therefore twice as rich as chicken manure and four times more potent than horse or cow manure. Rabbit manure is safe to apply to soil growing edible crops, has virtually no smell, and contains no harmful seeds. It can be used immediately, or be dried, powdered, made into tea, or turned into worm castings. A single trio of rabbits and their offspring can produce up to two cubic yards of fertilizer per year, along with 100 to 200 pounds of meat.
Rabbit manure is in such high demand as a fertilizer, particularly for roses, that it’s often sold online at a premium price. Some rabbitry owners even charge people to come scoop the manure themselves, paying by the bag. Larger rabbitries might sell by the truckload, but many owners keep it all for their own gardens. You may wonder what makes this little mammal’s excrement so uniquely useful. To understand, we first need to look at the qualities that make it special and then explore its various applications.
To begin with, let’s take a closer look at a rabbit’s biology. Contrary to popular belief, rabbits are not rodents but belong to the order Lagomorpha and family Leporidae, along with hares. All domestic rabbits are domesticated European rabbits (Oryctolagus cuniculus) and are unable to produce fertile offspring with American cottontails. Rabbits are considered “pseudo-ruminants” because they have a single-chambered stomach, but they also have an organ called the cecum, which functions similarly to a rumen and makes up about 40% of their digestive tract. They are crepuscular, meaning they are most active at dawn and dusk, typically feeding in the evening.
Rabbits actually produce two kinds of manure. The familiar dry pellets make up most of their waste, while the other type, known as “cecotropes,” is a moist and smelly substance resembling tiny bunches of grapes. Cecotropes are not fully digested, and because rabbits cannot chew their cud, they reingest the cecotropes as they are excreted. This fermented substance allows the rabbit to absorb more nutrients than it would through initial digestion. While cecotropes are occasionally found in cage trays, the feeding behavior that leads to them is usually only witnessed by the rabbit owner.
The dry pellets are the true manure that most people are familiar with. These small, round, dry pellets have almost no smell when kept dry. When crushed, they break down into a powder resembling tiny grass fragments because, in essence, that’s what they are. Some people crush the pellets before applying them to speed up their absorption into the soil, while others appreciate their “slow-release” feature. Additionally, the manure’s water solubility can be exploited in several ways. Soaking a wheelbarrow full of manure creates a potent sludge that can be easily applied to flat surfaces. If the odor is not an issue, the smell will dissipate once the manure is either dissolved by moisture or dried by the sun. Another method is to make manure tea: fill a cloth bag with manure, seal it, and submerge it in a barrel of water for a few weeks. A simpler method involves placing damp manure at the bottom of a barrel, filling it with water, and letting it sit in the sun for a couple of weeks. Stir occasionally, and you’ll have a powerful liquid fertilizer ready for use.
Domestic rabbits should be fed a modern, pelleted feed, which provides all the nutrients they require. This diet eliminates the risk of noxious seeds being present in the manure, making it safe to apply directly to the lawn, especially during winter. Winter and spring rains will break it down, and by late spring, you’ll have a healthy carpet of turf.
Rabbit manure’s nutrient content varies depending on factors like storage, age, and diet, but it generally contains around 2% nitrogen (N), 1.3% phosphorus (P), and 1.2% potassium (K). The Oregon Extension Service gives a range of 3-4.8% nitrogen, 1.5-2.8% phosphorus, and 1-1.3% potassium. Even at the lower end of the scale, rabbit manure has higher nitrogen content than poultry manure and twice the nitrogen content of cattle manure. One reason rabbit manure doesn’t burn plants is due to the biology of birds, which lack bladders and produce more ammonia in their waste. In contrast, rabbits release ammonia in their urine, which is why their manure may have a stronger odor.
Because of its balanced nitrogen-to-phosphorus ratio, rabbit manure promotes a wider variety of species in the same application area. Applying it directly to heavy clay soils will improve them quickly, especially when combined with other organic matter. It can also improve sandy soils by adding texture and helping them retain moisture. Anyone raising rabbits will have a steady supply of manure, as they are efficient producers. A small herd of 17 animals, including their litters, can produce about one ton of manure annually.
Beyond fertilizing, rabbit manure has several other uses. It is considered the best food for earthworms and can be combined with moisture-holding bedding like peat moss, shredded paper, or hay taken from used nestboxes. Many rabbitries (including my own) keep worm beds right under the cages. The resulting castings are rich in nutrients and can be used as-is or incorporated into soil amendments. A couple of feet of manure under a foot of soil in a hotbox can generate enough warmth to start and grow seeds, even in cold climates like Vermont.
In Europe and Asia, the rabbit meat industry is a billion-dollar market. While the Czech Republic leads in per capita consumption (over 8 pounds per person annually), China is the leading producer of rabbit meat. A recent study in China examined the effects of replacing peat moss in seed-starting soil with rabbit manure. The study found no significant difference in germination rates and noted that the manure provided increased nutrients for seedlings. The ideal ratios for seed-starting soil were found to be one-third manure, one-third perlite, and one-third vermiculite, or half manure and half perlite.
Rabbit manure is often overlooked as a nuisance, but as we can see, it’s an incredibly versatile soil conditioner, excellent fertilizer, ideal food for earthworms, and a superior seed-starting medium. Anyone raising rabbits should consider this another benefit, in addition to having a home meat supply, exhibition livestock, or pets.
Farm & Ranch
Leopold’s Legacy: The Five Tools That Shaped Conservation
By Raenne Santos
Known as the father of wildlife management, Aldo Leopold’s teachings reshaped our understanding of conservation and our role in nature. His philosophy, rooted in ethics, ecology, and action, emerged in response to the environmental degradation of the early 20th century in the American West. Overgrazed pastures, eroding soils, and changing wildlife populations revealed the consequences of treating natural resources as limitless.
Recognizing these challenges, Leopold theorized a transformative approach to land stewardship, emphasizing that the land is not merely a commodity, but a community in which we all belong. His works, A Sand County Almanac and Land Ethic, are still referenced to this day by modern conservationists. In Land Ethic, he introduced a practical framework for wildlife management known as the Five Tools of Wildlife Management, which offers land stewards a structured approach to maintaining and restoring ecological balance.
Symbolizing brush management, the axe is one of Leopold’s tools for controlling invasive species, shaping habitats, and mitigating wildfire risks. By selectively removing vegetation, land managers can enhance biodiversity, create open spaces for native species, and maintain healthy ecosystems.
Representing grazing animals, the cow (when used properly) mimics the natural disturbances once provided by bison. Grazing animals promote healthy ecosystems by aiding in nutrient cycling and soil disturbance. Responsible grazing practices prevent overuse and contribute to sustainable land management.
The plow signifies mechanical disturbance and soil preparation, crucial for habitat restoration and agricultural productivity. Used strategically, it aids in cultivating crops and creating conditions favorable to wildlife. However, misuse can lead to erosion, requiring careful application in conservation efforts.
Fire, a powerful natural tool, plays a crucial role in maintaining biodiversity and landscape resilience. Land managers use prescribed fire to control invasive species, rejuvenate plant communities, and shape habitats. Fire promotes the natural cycles of ecosystems and supports species diversity.
The final tool, the gun, is used to manage game populations and control predators. During Leopold’s time, unregulated hunting contributed to species extinction and posed threats to others. Today, hunting is strictly managed through game laws and seasonal regulations to ensure sustainable populations.
Leopold’s Five Tools of Wildlife Management continue to influence conservation practices today. While techniques have evolved, the fundamental principles remain the same—balancing human involvement with ecological processes to sustain healthy ecosystems. His approach emphasizes the importance of working with nature rather than against it. By embracing ethical land stewardship, modern conservationists honor Leopold’s vision, ensuring that future generations inherit thriving landscapes.
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