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“It is used extensively in oil and gas exploration, and in so many other ways.” “Guar gum is a common ingredient in the food we eat every day,” he said. Guar has been grown in Texas for more than a century, but acreage of the crop in the state is relatively low. Thapa said guar is unfamiliar to most people, but it is a part of their lives nonetheless. “As a legume, Rhizobium bacteria in the soil will associate with guar roots and potentially develop nodules where the bacteria converts atmospheric nitrogen into fertilizer for the plant and soil,” he said, adding that “the plant is also drought tolerant and uses relatively little water.” Guar is grown in semi-arid regions and produces a seed containing galactomannan gum, which is a product used in a variety of food and industrial applications as a lubricant, binder, thickener or hardener, he said. The team conducted a controlled environment study to compare the impact of environmental and management factors on guar nodulation and crop nitrogen uptake, Adams said. Curtis Adams, Texas A&M AgriLife Research crop physiologist, Vernon, tested the effects of contrasting soils, a sandy loam and a clay loam, and Rhizobium inoculants on nodulation and plant growth in two guar varieties in the greenhouse. Nodules are root structures that legumes make to house bacteria capable of using nitrogen gas from the air to form fertilizer that the plant can use to grow.ĭr. Nodulation is the process of forming nodules on the roots of legume plants.
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Santanu Thapa, AgriLife Research postdoctoral research associate in Vernon. Calvin Trostle, Texas A&M AgriLife Extension Service agronomist in Lubbock, along with Dr. Lack of nodulation on guar roots is one of the producer concerns addressed in a recent AgriLife Research study by Adams and Dr. Curtis Adams, Texas A&M AgriLife Research crop physiologist in Vernon, Guar has been grown in Texas for more than a century, but acreage of the crop in the state is relatively low, said Dr. Curtis Adams, 94, – Texas A&M AgriLife scientists are conducting several research projects to improve producers’ understanding of guar and the legume’s value to their operations in the Rolling Plains and South Plains.
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