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[AgriLife Today] Study investigates impact of strip tillage on a high-value crop

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By: Paul Schattenberg

Also addresses biological activity in soil

Writer: Paul Schattenberg, 210-859-5752, paschattenberg@ag.tamu.edu

Contacts: Dr. Daniel Leskovar, 830-278-9151, d-leskovar@ag.tamu.edu

Dr. Xuejun Dong, 830-278-9151, xuejun.ong@ag.tamu.edu

UVALDE – A study done by researchers at the Texas A&M AgriLife Research and Extension Center in Uvalde may help producers in the Texas Winter Garden region and other areas decide whether conservation tillage methods might benefit them in the production of high-value crops.

Conducted by Dr. Daniel Leskovar, a Texas A&M AgriLife Research vegetable physiologist and center director, in collaboration with Drs. Yahia Othman and Xuejun Dong, the study also includes research results on how strip tillage affects soil biological activity.

The study, titled “Strip tillage improves soil biological activity, fruit yields and sugar content of triploid watermelon,” investigated the influence of strip and conventional tillage practices at different water levels on the morphology, physiology, yield and quality of the seedless Majestic watermelon variety. Published in the November 2016 issue of Soil and Tillage Research journal, highlights and an abstract of the study can be found at: http://bit.ly/2k4yNKA.

Strip tillage is a conservation tillage practice involving minimum tillage to create a seedbed condition that disturbs only the portion of the soil to contain the seed row. The no-till area has crop residues and undisturbed soil to cover at least 30 percent of the topsoil surface.

The results showed strip tillage not only had a positive effect on watermelon quality and yield, it also had a positive effect on the soil’s biological activity, said Leskovar, the primary investigator for the study. He noted study results were also recently presented at the annual meeting of the Southern Region of the American Society for Horticultural Science in Mobile, Alabama.

“Research has been done on the use of conservation tillage for traditional crops, but there’s not much out there on using conservation tillage to produce high-value crops,” he said. “Despite the economic importance of watermelon in the U.S., which the U.S. Department of Agriculture’s National Agricultural Statistics Service estimates  $483 million annually, no study we know of has assessed the influence of strip tillage on this crop.”

Leskovar said the experiment setup was designed as a circular split plot replicated four times with soil tillage and irrigation level as primary and secondary components. The portion of the study relating to the impact on watermelon was conducted from 2012-2014 using two tillage practices – strip and conventional – at three irrigation levels.

A center pivot system was used for irrigation at levels of 100 percent, 75 percent and 50 percent evapotranspiration. Evapotranspiration refers to the amount of water transferred from the land to the atmosphere by evaporation from soil and other surfaces, including plant leaves.

The study was conducted over three spring seasons on an established clay soil site at the center.

“We have been employing conservation and conventional tillage practices under the center pivot area from 2009 to the present, so the portion of the study relating to soil biological activity reflects six years of these tillage practices,” he said. “The crop history of the field we used for the study included corn as a cover crop in 2009, cotton in 2010 and corn again from 2011-2015.”

Watermelon sugar content was measured  using the Brix scale. (Texas A&M AgriLife Research photo)

 

 

 

 

 

 

Plant morphology, physiology and yield were determined by measuring the photosynthesis rate, stomatal conductance and chlorophyll content index. Fruit firmness was determined using a digital force gauge, and fruit sugar content was measured using a digital refractometer.

Measurements were taken at flowering, fruit development and harvest stages. Vine length was also measured at the harvest stage.

Total marketable yield and fruit quality, based on firmness and sugar content, were determined during the harvest period, with soil chemical and microbial analyses conducted at the end of the experimental period.

“One of the most interesting results of the study was that marketable watermelon yield from strip till was higher than conventional till during all three years of the study,” Leskovar said. “Across the three years, the greatest difference in marketable yields between the strip and conventional tillage systems was in the fruit size from 5 to 8 kilograms or about 11 to 18 pounds, which was 50 percent of the total yield. In addition, the sugar content of the watermelon, which we measured using the Brix scale, increased significantly as a result of employing strip tillage.”

Leskovar said the increased yield and sugar content for marketable watermelon are factors that should appeal to producers interested in planting that crop and to consumers for the potential improvement in taste.

Dong, an AgriLife Research assistant professor and crop physiologist at the center, said because tillage practices are critical for sustaining soil quality necessary for successful crop growth and productivity, it is also important to assess soil chemical and biological properties in the study.

He also noted that using strip tillage in clay soil such as that found in the Winter Garden can also necessitate the occasional use of conventional tillage.

The study revealed strip tillage had positive results on both yield of marketable watermelons and sugar content. It also improved various aspects of soil biological composition, including bacteria, fungi and certain nematodes.  (Texas A&M AgriLife Rersearch photo)

“The ecosystem of clay soil is complex and dynamic,” he said. “Limited tillage helps preserve the macropores of the soil to allow for water to penetrate and reach the plant roots, and to protect the soil biology. But the reduction of tillage disturbance alone cannot alleviate the compaction of clay soil, so it may be necessary to do conventional tillage every five years or so to loosen it and help preserve its biological ecosystem.”

The study showed tillage practices at the site had increased total bacteria in the soil by 49 percent, active bacteria by 27 percent, active and total fungi by 37 percent, nematodes by 275 percent and electrical conductivity by 14 percent as compared to conventional tillage.

“However, strip till also significantly increased the number of root-feeding nematodes, which are harmful to plant roots, but these may be related to the previous (corn) crop since it did not affect the watermelon plants,” said Othman, formerly a research associate at the center and now an assistant professor at the University of Jordan in Amman. “It also reduced phosphorus and nitrate content as compared to conventional till, a response that could either be due to higher uptake of these elements by the watermelon plants or due to leaching in the strip bands.”

Leskovar noted while long-term studies aimed at assessing soil quality and cumulative yield are required to further validate the study’s results, yield and sugar content responses were consistent across the three years of the study, and there was an abundance of soil microbial activity as a result of using strip tillage.

“Of course, there are pros and cons to using strip till and other means of conservation tillage,” he said. “But now we have some results applicable to watermelon, and this research may stimulate additional investigations into the use of strip till or other conservation tillage practices in the production of high-value crops.”

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Farm & Ranch

Tumble Windmillgrass

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By Tony Dean

Tumble windmillgrass is a short, compact perennial bunch grass that is adapted to almost every corner of Texas.  It can grow on almost any soil, but prefers coarse textured soils. 

The most obvious characteristic about Tumble windmill is its large seed head sporting 10 to 16 laterally spreading branches, each approximately two to six inches long, arranged in one to three whorls.

When mature, the seed head will break off and be caught up in the wind, making Tumble windmill one of the great wanderers of the plains.  It can tumble great distances, spreading itself in the process.  This wanderer seems to like parking in your garage on windy days, as well as dancing around windy corners of buildings and any other place the wind decides to carry it.

Tumble windmill can also spread by short stolons.  The upper leaves are very short, while the lower leaves are often much longer. The leaves are light green with a purplish seed head that fades to pale reddish at maturity.

Tumble windmillgrass provides poor forage for livestock and wildlife, although most grazers will use the forage in early spring when tender.

Since Tumble windmill can grow in poor soil conditions, it is useful as a component for a prairie grass mix used on disturbed areas. This grass does not usually dominate a pasture but can often be found in smaller amounts.  Proper grazing use along with rotational grazing can cause the plant to be replaced with higher successional plants.

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Farm & Ranch

Looking for Low-Maintenance Poultry? Geese are Your Answer!

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Unless you are a fan of Dickens and Doyle, geese probably aren’t the first thing that comes to mind when you think of poultry. But maybe they should be. And the aim of this article is to get you acquainted with the aristocrat of poultry.

Let’s start with the basics. Geese are domesticated waterfowl. Twelve breeds are recognized by the American Poultry Association, but dozens more are available. Much like ducks, all domestic geese breeds descend from two species. The overwhelming majority of breeds originate from Greylag geese (Anser anser). This species is native to Europe and Central Asia. These are the stockier, heavy geese that feature prominently in German fairy tales as a symbol of wealth and which Victorians loved to consume at Christmas. These geese come in various sizes, colors and dispositions. Here are a few examples: Cotton Patch geese are a small, variably-colored, extremely heat tolerant landrace native to the South. These were raised to consume weeds in cotton fields in the days before commercial herbicides. They are quite rare today and lay a variable number of eggs. American Buff geese are medium-sized, tan colored, very docile geese of uncertain origin. They are excellent meat birds. They are decent layers and wonderful mothers. Toulouse geese are the largest breed at up to thirty pounds. This ancient French breed is dark grey in color. They are bred to become very fat and so must be managed carefully to maintain fertility. They are very gentle, but require somewhat more shelter than other breeds.

A native of parts of China, Mongolia and Russia, the Swan Goose (Anser cygnoides) gave us both the Chinese goose and the African goose. Both have large bulbs on their heads and are similarly colored, but are otherwise very different. African geese are quite large, maturing at around twenty pounds and prized for their meat. These gentle giants are often recommended for beginners. Chinese geese are the egg champions of the goose family. They produce multiple clutches in a year, equaling up to a hundred eggs annually. They are small geese with males weighing about twelve pounds and females ten. They are nervous and the loudest breed, but this makes them suburb as “watch geese” and perhaps the best all-purpose breed.

Now that we are a bit acquainted with various breeds, we can find out just why someone may want to keep geese. Before we go over their benefits, you may be surprised to learn something surprising about geese. Geese are so rarely seen in the United States today that they can seem unusual, even exotic. As such, you may reasonably expect that geese are hard to manage, require expensive feeds and must be waited on hand and foot. The surprise is that geese are actually significantly easier to take care of than chickens. In fact, I would venture to day that geese are the lowest maintenance poultry there are.

Geese are unique among poultry in that the vast majority of their diet is made up of grass. Some meat birds are raised entirely on grass. It may be a good idea to supplement their grass with some chicken feed and scratch grains, but you will find that, when grass is plentiful, they will generally not bother with anything else. Geese are excellent pasture birds. A simple wire pen that can be moved every other day is enough to keep them happy. Unlike chickens, geese do not scratch up a yard and are not nearly as messy as ducks. If moved promptly, the area they occupied will swiftly grow back greener, thanks to all the free fertilizer, which they produce in abundance. Few geese can fly with any proficiency and even then, only when they are young. One wing’s feathers can be easily clipped, if their escape is a concern.

Geese are also almost absurdly hardy. They not only love rain, they seldom if ever go inside. Shade and perhaps a windbreak are their only real needs for shelter. In sub-freezing temperatures, they will scorn a shed and simply sit in the snow. There is a reason that goose down is so valued for comforters. It is extremely good at keeping them warm. The clever little birds know exactly when they need to bend down over their feet to keep them warm and hide their heads under their wings for the same purpose. In the summer, geese require shade and access to water at all times, but are otherwise unbothered. Geese keep their bodies very clean and are, owing to a small oil gland and their meticulous grooming, waterproof. They will soil water almost instantly, so do not worry about keeping it clean, just be sure they have enough. Without water, they may die in the heat and regardless (like ducks) cannot keep their bills and eyes clean, which could cause disease. Provide multiple water tubs to reduce fighting. Geese will dig up the mud around their waterers, so they should be moved each time they are filled. They will appear to be eating the mud, but are actually filtering it in the water through the serration in their bills. This is to find food, as well as small rocks for their gizzards. With a bit of caution, geese will weed a garden for you and clean it up at the end of the season.

Geese need little more from you than water, basic protection from predators and grass. In return, they offer a number of benefits.

In the first place, Geese offer a dark, rich, beef-like meat. Geese are often butchered between twelve and twenty weeks old. At this time, their weight will vary by breed, but as an example, the commonly raised meat breed Pilgrim geese will weigh around thirteen pounds. The carcass weight will be about sixty to seventy percent of the live weight. If one cares to process it, goose fat is highly valued in the culinary world and contains almost no saturated fat. It is comparable to olive oil and may be used in the same applications.

Especially if you have selected the Chinese goose, eggs are another offering of your new favorite poultry. These eggs are roughly the equivalent of three chicken eggs. A fried goose egg, sausage or bacon and a pancake makes a very nice dinner or hearty breakfast. Alternatively, you can incubate and hatch goose eggs quite easily. The goslings are so valuable that it’s a wiser financial move to only consume the first couple of eggs laid in the spring, which are usually infertile. Goose eggs are easily candled without any special equipment. Infertile eggs or those that die early on can be blown out and made into painted or dyed eggs.

If you hate waste, and wish to use all but the “honk,” so to speak, the feet are rich in collagen and highly prized in the rest of the world. The liver of a goose is extremely healthy and famous as foie gras. A more familiar byproduct of butchering is down, which can be made into extremely valuable bedding. Be sure to clean and dry feathers carefully first. If raised by hand and handled very often, geese will be quite friendly to their owners and make loyal pets. Some people will actually hold their geese in their laps and gently pluck the down from their flock.

Lastly, geese are often kept as watch animals. Geese are extremely observant night and day and will loudly complain when they see something unfamiliar anywhere in the vicinity. It takes a very short time to learn the difference between the normal sounds of geese and the sound of their panic. Please know that while they may scare away small predators and they are nearly always too big for hawks, a goose is largely defenseless against most predators. Keeping geese near a livestock guardian dog is a great idea. The extremely intelligent birds will rapidly learn the dogs are a source of safety and will alert the dogs to anything they see as a threat. Geese can usually be kept with other poultry without problems. They will not directly protect their avian brethren, but the others will learn to hide when the more observant geese voice a concern. In mixed flocks, the noble geese stride around the yard, aristocracy among poultry.

Geese are immensely versatile, the most low-maintenance poultry there is and should have a place on any property.

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Farm & Ranch

Changing the Way We Handle Hay

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Few machines have reshaped livestock operations as much as the round baler. Before its arrival, haymaking was slow, labor-intensive, and limited by the storage and handling of small square bales. The round baler mechanized the process, producing large rolls that could be handled with tractors instead of back-breaking labor. Today, those big bales are a familiar sight across Oklahoma, Texas, and much of the world, stacked along fence lines or dotting pastures.

The modern round baler traces back to the mid-20th century. While early versions of hay-rolling machines appeared in Europe in the 1940s and 1950s, it was a man from Iowa who brought the design into practical use in America. In 1971, Vermeer Corporation, led by Gary Vermeer, introduced the first large round baler that could be mass-produced and widely adopted. His design gathered hay into a chamber, rolled it into a tight cylindrical package, and then wrapped it with twine before ejecting it onto the ground.

This solved a long-standing bottleneck. Small square bales required enormous labor — lifting, stacking, hauling, and feeding by hand. One person with a tractor and round baler could do in hours what once took a crew all day. The new bales were weather-resistant, stored easily outdoors, and reduced spoilage. They also fit well with the larger scale of modern cattle operations.

By the 1980s, other manufacturers such as John Deere, New Holland, and Case IH offered their own models. Improvements included variable chamber sizes, better pickup systems, and stronger tying methods. Round balers quickly became the standard for beef and dairy producers in Oklahoma, Texas, and beyond.

Though models vary, the principle remains the same. The baler picks up cut hay from the windrow and feeds it into a chamber with belts, rollers, or chains. As the hay circulates, it rolls into a tight cylinder. Once the bale reaches the set size — often 4×5 or 5×6 feet, weighing between 800 and 1,200 pounds — the machine stops feeding, and the bale is wrapped for storage.

The result is a dense, weather-resistant package that can be moved with a tractor spear or loader. Unlike small square bales that require dry storage, round bales can be stacked outdoors, especially when wrapped correctly.

The biggest evolution in round baling since its invention has been the way bales are bound. Early machines used only twine, usually sisal or synthetic. Twine is inexpensive and reliable, but it has drawbacks. Wrapping a bale with twine can take up to two minutes, slowing production. Twine also leaves more exposed surface area, allowing moisture to penetrate and spoil hay.

Net wrap was introduced in the 1990s as a solution. Made of high-strength polyethylene, it wraps the bale quickly — usually in 10 to 20 seconds — and covers more surface area. This tighter, more uniform wrap sheds water better and reduces spoilage, especially for bales stored outside. Net-wrapped bales also hold their shape better, making them easier to stack and transport.

Producers must weigh cost against efficiency. Net wrap is more expensive than twine, both in material and in required equipment, but many ranchers find the savings in time and hay quality worth the investment. Twine remains common for operations feeding hay quickly or storing it under cover, while net wrap dominates in large-scale or commercial setups.

In recent years, bale film wrap has also entered the market. Similar to plastic used in silage, film wrap can seal bales almost completely, reducing spoilage even further. While more expensive, it is gaining ground in wet climates and dairies where feed quality is critical.

The round baler is more than a machine — it changed the rhythm of haymaking. Producers can now harvest, bale, and store hundreds of tons of hay with a fraction of the labor once required. In regions like Oklahoma and North Texas, where cattle herds are large and hay is often stored outdoors, round balers became indispensable.

The machine also influenced land use. With the ability to bale quickly and efficiently, ranchers could harvest larger fields and manage forage with precision. It also reduced dependence on hired labor during peak hay season, a major benefit as rural populations declined.

While square balers still have their place — especially for horse hay and small-scale operations — round bales remain the workhorse of modern cattle ranching.

From its introduction in the 1970s to its widespread adoption today, the round baler has proven to be one of the most influential farm inventions of the last century. It solved the labor bottleneck of haymaking, improved storage and feed efficiency, and fit seamlessly into the mechanization of modern agriculture.

Whether wrapped in twine, net, or film, those big round bales are more than just scenery on a country road. They are symbols of an innovation that continues to save time, labor, and feed across ranch country. Like the steel plow, barbed wire, and windmill, the round baler is an invention that permanently changed the way we work the land.

References

Vermeer Corporation. History of the Round Baler. https://www.vermeer.com

John Deere Equipment. Hay and Forage History. https://www.deere.com

Oklahoma State University Extension. Hay Storage and Preservation.

Texas A&M AgriLife Extension. Net Wrap vs. Twine for Round Bales.

Farm Progress. “Round Balers: The Machine That Changed Haymaking.”

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