Gypsum in soil - CaCO 3, gypsum and biochar amendments decreased water soluble Na +. • Biochar amendment significantly reduced DON loss in extremely low fertility soil. • Gypsum and biochar amendments improved soil organic matter stability. • Water-logging caused carbon-nitrogen decoupling in saline-alkaline paddy soils.

 
Feb 10, 2024 · The application of gypsum offers several advantages for soil health and plant growth: Soil Structure Improvement: Gypsum helps break up compacted soil, enhancing …. Lash extensions austin

AB - Barite pseudomorphs after lenticular gypsum in a buried soil from central Australia are composed of loosely arranged platy crystals. These features were most probably formed by direct alteration with barium-rich solutions. The possible sources of the barium-rich solutions are briefly discussed. KW - Barite. KW - Lenticular gypsumGypsum is neutral in pH and will not affect soil acidity. In the absence of a soil analysis, use the recommended rates below. Lawns: In spring, apply 5-20 lbs ...Gypsum can help loosen clay soils and improve soil structure by transforming fine, tightly packed particles into larger clumps that make the soil more porous, allowing air, water and nutrients to penetrate the soil more easily. This also helps to encourage better root development, resulting in stronger, healthier plants.Riding a 50cc (cubic centimeter) dirt bike can be exhilarating, convenient and efficient. These bikes are the most powerful you can ride without a special license, and they are gas...Gypsum encourages soil structure improvements with better retention of organic matter as well as aiding the movement of water through the soil profile. Gypsum also helps to reduce wind and water erosion that can be a problem in freshly prepared and exposed soils during the early years of vineyard and orchard establishment. Gypsum can also help ... Gypsum is widely found in soils under arid and semi-arid climates due to its semi-soluble nature. In spite of that, they are less known than other soils, and this has generated some misunderstandings in some initial pedological concepts and in soil classification systems. In addition, the quantification of gypsum, and in particular of its secondary accumulations is affected by the sampling ... When gypsum provides any one of the above benefits higher yields can be realized. The National Soil Erosion Laboratory at Purdue University in West Lafayette, IN has performed many research projects (Dr. Darrell Norton, et.al.) showing the benefits of gypsum on increasing water infiltration and improving soil structure.This paper describes a laboratory trial to test the effectiveness of a waste-based binder as a cement replacement for deep in situ soil stabilisation. The binder is composed of red gypsum, a co-product of the production of white pigment titanium dioxide, and ground granulated blast furnace slag (GGBS), with a small addition of lime to increase soil pH …We supply and deliver bulk natural screened Gypsum and other products to address your hard, heavy or sticky soil issues. We also have equipment and staff to spread, incorporate and mix materials into the treatment areas. Drying and amelioration of soils can also be undertaken by our staff and equipment. Voight Contracting not only supply ...Sandy soil is exactly what its name suggests — a soil that has a high concentration of sand particles. Other types of soil may have a high clay or silt concentration but, in sandy ... Gypsum dissolves in water to release Ca²⁺ and SO₄²⁻, with no significant direct impact on soil pH. In contrast, limestone will neutralize acidity in low- pH soils. In regions with acid subsoils, growers sometimes use it as a relatively soluble source of Ca for alleviation of aluminum toxicity. Some soils benefit from application of ... Gypsum encourages soil structure improvements with better retention of organic matter as well as aiding the movement of water through the soil profile. Gypsum also helps to reduce wind and water erosion that can be a problem in freshly prepared and exposed soils during the early years of vineyard and orchard establishment. Gypsum can also help ...Gypsum, or calcium sulfate (CaSO4), is a naturally occurring, neutral salt (pH ~6.7). It contains approximately 20% calcium and 16% sulphur and thus can be used to improve soil calcium and sulphur levels. Gypsum is about 200 times more soluble than agricultural lime, allowing it to move readily down the soil profile where it can help to ...Gypsum is a calcium sulfate containing product that provides both calcium and sulfate to the soil system. No change in pH can be expected from a gypsum application. The calcium in gypsum can replace sodium in sodic soils or aluminum where aluminum toxicity might be a concern. Neither of these situations are common in Ohio.May 30, 2023 · Primarily, gypsum is used for helping to break up heavily compacted clay soils making them more porous and able to absorb …Soil gypsum content had a significant effect on water retention. Soils that had high gypsum content made WRC with higher water retention at near saturation conditions, and steeper WRC slopes. The EG threshold at which gypsum content had an effect on WRC was about 40%, and EG was positively and negatively correlated with the …When gypsum provides any one of the above benefits higher yields can be realized. The National Soil Erosion Laboratory at Purdue University in West Lafayette, IN has performed many research projects (Dr. Darrell Norton, et.al.) showing the benefits of gypsum on increasing water infiltration and improving soil structure. Success in reclaiming non-irrigated sodic or saline-sodic soils with gypsum application may be possible on coarse textured soils that receive precipitation in excess of soil water holding capacity. Remember: Adding sulfur products only makes sense when: a) a soil is sodic and has free lime present or, when; b) a soil is basic (high pH). A brief note on the concept of Alkaline Soil and how Gypsum helps in the treatment of Alkaline Soil which is very useful for the preparation of competitive examinations like UPSC-prelims, SSC ...Aug 11, 2022 · Gypsum mining spoil (GS) is a waste material highly produced in gypsum mining industry, which has never been used in soil remediation despite its high potential …Sep 1, 2015 · Gypsum is one of the soluble salts that can have a detrimental effect on subgrade soils, buildings and earth structures if it is presented in high quantities in the soil (Subhi, 1987, Obika et al., 1989, Razouki et al., 1994, Razouki and Kuttah, 2004, Razouki and Kuttah, 2006). According to Klein and Hurlbut (1985), gypsum (CaSO 4 ·2H 2 O ... An application of gypsum (calcium sulphate) to the soil will increase calcium levels in the soils and therefore flocculates the soil, which improves soil ...Jun 1, 2011 · This paper describes a laboratory trial to test the effectiveness of a waste-based binder as a cement replacement for deep in situ soil stabilisation. The binder is composed of red gypsum, a co ...Salinity impedes soil and crop productivity in over 900 million ha of arable lands worldwide due to the excessive accumulation of salt (NaCl). To utilize saline soils in agriculture, halophytes (salt-tolerant plants) are commonly cultivated. However, most food crops are glycophytes (salt-sensitive). Thus, to enhance the productivity of saline soils, …GYPSOIL brand gypsum supplies calcium and sulfur in a single product. GYPSOIL brand gypsum is a soil amendment used by corn, soybean, alfalfa, cotton and other crop growers to increase crop productivity through improved soil structure and valuable added nutrients. GYPSOIL brand gypsum (calcium sulfate dihydrate [CaSO4 - 2H2O]) is an excellent … The sulfate in gypsum binds with excess Mg in the soil to form soluble Epsom salt, which moves lower into the soil profile. This Mg is replaced by Ca, improving water holding capacity, root development and soil quality. 2. Key Terms. Soil pH: A measure of acidity or alkalinity of soil, relative to the amount of hydrogen atoms presents. On a ... 29 Apr 2023 ... No. The only way to quickly change the mineral composition of your soil (sand, silt, clay) is through adding one of those to your soil. This ...When the gypsum content exceeds 5%, it can have a detrimental effect on the soil quality. However, the specific threshold varies depending on factors such as soil type, particle size distribution ...Those white beads you see in potting soil are made of a volcanic glass called perlite. And that's not the only place you'll see this versatile material. Advertisement Tear open a b...Dec 31, 2015 · Gypsum soils only occur in drylands in arid, temperate and continental climates (Eswaran and Zi-Tong 1991;Herrero et al. 2009; Casby-Horton et al. 2015), where low precipitation prevents gypsum ...Gypsum (calcium sulphate dihydrate) causes the small particles found in clay soil to flocculate to create larger particles. In doing so, this enables better ...The Determination of Gypsum in Soils. J. Herrero O. Artieda D. Weindorf. Environmental Science, Agricultural and Food Sciences. 2018. We present the Chapter about the Soil Gypsum Determination that appeared in the Methods of Soil Analysis, published in an electronic format (available as a pdf or html version) by the Soil …Soil acidity is one of the most limiting factors in crop yield. We evaluated the effect of soil acidity correction with magnesium limestone and calcium (Ca) and magnesium (Mg) silicate associated gypsum application, on the growth of a forage grass. The experiment was conducted in a greenhouse with a soil sample from B horizon of a …An application of gypsum (calcium sulphate) to the soil will increase calcium levels in the soils and therefore flocculates the soil, which improves soil ...6 days ago · So, what is gypsum used for in soil? Gypsum is added to soil to supplement calcium and sulfur without changing soil pH. Gypsum can also remove excess sodium …Soil erosion is a major problem for many homeowners. It can lead to costly repairs and damage to your property. Fortunately, there are steps you can take to prevent soil erosion an...Agricultural Gypsum Uses Agricultural Gypsum (Calcium Sulfate - CaSO4) is one of those rare materials that performs in all three categories of soil treatment: an amendment, conditioner, and fertilizer. Soil conditioners, such as gypsum, are seriously undervalued compared to fertilizer usage. Dr. Arthur Wallace (Ph.D. SGypsum (calcium sulphate dihydrate) causes the small particles found in clay soil to flocculate to create larger particles. In doing so, this enables better ...Download the national Amending Soil Properties with Gypsum Products (Ac.) (333) conservation practice standard and supporting documents. National Standard Document NOTICE - National conservation practice standards should not be used to plan, design or install a conservation practice.The application of gypsum amends soil aggregation which, in return, promotes seed sprouting, root penetration, and aeration. In addition, gypsum’s solubility promotes soil porosity which enhances water infiltration. Also, the application of gypsum enables fibrous root crops such as wheat and corn to root deeper and better absorb nutrients.The Determination of Gypsum in Soils. J. Herrero O. Artieda D. Weindorf. Environmental Science, Agricultural and Food Sciences. 2018. We present the Chapter about the Soil Gypsum Determination that appeared in the Methods of Soil Analysis, published in an electronic format (available as a pdf or html version) by the Soil …Inorganic carbonate either accumulates in soils by pedogenic formation or is inherited from calcareous parent material. Gypsum is precipitated near the soil surface as a loose earthy powder on ped faces and in pores by evaporation of calcium sulfate-rich waters drawn to or near the surface by capillary action. Gypsum Adds Calcium and Sulfur to Soil. You can add gypsum to your soil to provide calcium and sulfur. Both of these nutrients are necessary for proper plant growth. These nutrients will remain available to plants for weeks or even months after the addition of gypsum to your soil. Gypsum contains both calcium and sulfur. Feb 6, 2019 · Gypsum can’t solve every agricultural problem, but it is a proven resource to add nutrients and improve soil structure. “It’s a great example of recycling a waste product and using it in a beneficial way,” Dick says. Dick, Professor Emeritus at The Ohio State University, presented “Crop and Environmental Benefits of Gypsum as a Soil ... Jan 1, 2015 · The adjective “gypsiferous” will refer to soils in which gypsum is not the primary constituent. The dominant components of gypsiferous soils are parent sediments, such …Please Note - This is a natural mined product and is not the "chemical" gypsum that you find in larger chain stores. The mineral gypsum is the source of the ...Using agricultural gypsum promotes nutrient descent and generates a less aggressive environment for roots, favoring their development and better use of water and nutrients. However, studies on apple trees are scarce, and there is no official recommendation for gypsum application in the soils of southern Brazil. This work aimed …Samples of soil gypsum with cyanobacteria: (a) Soil gypsic crust sample AT326b from the Atacama Desert; (b) soil gypsic crust sample DG from the Mojave Desert; (c) fibrous gypsum sample JB1 from a secondary vein exposed by erosion at the surface from Al-Jafr Basin, Jordan; (d) light micrograph of cyanobacterium Chroococcidiopsis in …Recycled Gypsum not only supplies a valuable source of Sulphur and Magnesium but also has major soil conditioning benefits. Our recycled Gypsum Powder is produced from Countrystyle’s bespoke state of the art recycling facility that recycles plasterboard back into powder to be re-used in the construction industry or diverted to be used in agriculture.Gypsum: If your soil is local clay (i.e. not introduced top soil) it can be useful to apply some gypsum, then water it in. The gypsum reacts with the clay and encourages the tiny clay molecules to ...When PG/gypsum are used with lime, cement and FA in stabilized soil, although the gypsum can further improve soil strength, there is an optimal ratio of cement, lime to gypsum when a maximum UCS is obtained for the stabilized soil (Ahmed, 2015; Aldaood et al., 2014, 2015; James and Pandian, 2014).Discovering the inventor of things is often not that easy. For instance, Thomas Edison did not invent the movie camera, even though that invention is attributed to him. William Dic...Differences in Mg 2+ level between treatments without and with gypsum were small in all studied soil layers, without statistical significance, in agreement with the results of Correia et al. (2017).Gypsum: If your soil is local clay (i.e. not introduced top soil) it can be useful to apply some gypsum, then water it in. The gypsum reacts with the clay and encourages the tiny clay molecules to ...Kordlaghari and Rowell [56] showed that, in a soil, the presence of gypsum can increase the absorption of the phosphate ions, added as KH 2 PO 4 . The microstructural analyses, SEM and XRD ...Oct 27, 2016 · The proposed method for gypsum determination determines the water loss of a soil sample by heating at 70 °C and 135–150 °C, which allows an accurate estimate of the gypsum content of a soil using a recovery factor of 19.66%. In a laboratory, the gypsum content of 120 soil samples can be determined in 60 min work. Using agricultural gypsum promotes nutrient descent and generates a less aggressive environment for roots, favoring their development and better use of water and nutrients. However, studies on apple trees are scarce, and there is no official recommendation for gypsum application in the soils of southern Brazil. This work aimed …1. Improved soil structure. The first major benefit of gypsum in soil is that it has the ability to enhance the soil structure. That’s because gypsum is a soil conditioner that promotes aggregation, which prevents the compaction of soil particles. As a result, the soil is not only well-structured but also porous - making it great for water ...Dec 23, 2016 · Gypsum effectively changes the structure and fertility of heavy clay soils, especially those that are heavily weathered or subject to intensive crop production. Gypsum also improves sodic (saline) soils by removing sodium from the soil and replacing it with calcium. Therefore, one can see improvement in clay soil structure and fertility, and ... Applying gypsum helps improve the structure of clay soils. To determine if your soil can benefit from gypsum, test saline amounts or simply observe if you are working with soil that is heavy with clay or hard to break up. Tip: Lower soil acidity can help increase vegetable production in the garden and enhance the appearance of your lawn. Gypsum is known to improve the plant productivity (Scott et al., 1993), enhances nutrient availability to plants (Vyshpolsky et al., 2010), improves soil moisture content by altering water holding capacity (Al-Oudat et al., 1998), improves soil structure, infiltration rate and enhances water movements in soil (Chi et al., 2012) and also promotes the root system …May 30, 2023 · Primarily, gypsum is used for helping to break up heavily compacted clay soils making them more porous and able to absorb …Gypsum is a relatively common mineral that is widely available in agricultural areas and has a number of specialized agronomic uses, principally as a Ca source on legumes and as a … Call 717-335-0379 for current pricing. USA Gypsum agricultural products provide sulfur and calcium for a more healthy soil for your crops. Calcium improves soil structure, aeration and drainage, resulting in increased water infiltration and reduced soil surface crusting and improved seedling emergence. Gypsum also helps break up compacted soil ... Gypsum in soil can be uniformly distributed, isolated in the soil matrix, or concentrated in special pedofeatures in some horizons. When uniformly distributed, it will be only possible to detect gypsum by identifying SO 4 2− ions through a qualitative chemical test for sulphates.25kg Horticultural Gypsum / Soil Improver 25kg Bag of Horticultural Gypsum Suitable as a fertiliser and soil improver Easy to use! Used.May 22, 2023 · Grab a jar with some clean water in it. Put some of your soil into the jar and shake it until the water goes milky. Let the jar rest for about 5 to 10 minutes. If the water is still milky and not clear, then your soil will benefit from an addition of gypsum. Soil is an essential part of any garden or landscaping project. Whether you’re looking to start a vegetable garden, create a flower bed, or just fill in some holes in your yard, yo... Gypsum can help loosen clay soils and improve soil structure by transforming fine, tightly packed particles into larger clumps that make the soil more porous, allowing air, water and nutrients to penetrate the soil more easily. This also helps to encourage better root development, resulting in stronger, healthier plants. Large amounts of gypsum are used as fertilizer or as a conditioner for soil, displacing sodium in the soil and allowing the soil to hold more moisture. Gypsum in the Upper Midwest: Few concentrated gypsum deposits occur in the Upper Midwest, but gypsum crystals, precipitated from groundwater, are disseminated through some local carbonate …Gypsum is neutral in pH and will not affect soil acidity. In the absence of a soil analysis, use the recommended rates below. Lawns: In spring, apply 5-20 lbs ...Oct 23, 2019 · Adding gypsum to lawns is not straightforward. A common recommendation is to apply 40-50 pounds per 1,000 square feet of soil. Established Lawn: Use about 10 pounds of gypsum per 150 square feet of soil. New Lawns: Use 10 pounds of gypsum per 100 square feet of soil. You should add gypsum in the spring and the fall. May 3, 2023 · By adding gypsum to the soil, we can improve soil pH levels, which in turn can increase crop yield and quality. Additionally, gypsum can help treat aluminum toxicity, which can be a common problem in acidic soils. Calcium is an essential nutrient for plant growth, and gypsum is an excellent source of calcium for plants. Gypsum can improve soil ...Nov 14, 2023 · Abstract. Gypsum is a sulfate mineral that exists at variable contents of top soils, particularly those in arid and semiarid areas of the world. Despite its relatively low …15 Sept 2021 ... Processing Gypsum into a Soil Amendment. When applying gypsum to soil, a pelletized form is ideal. Pelletized gypsum is easy to apply, mixes ...Gypsum (CaSO4.2H2O) is the most commonly used amendment for reclamation. Elemental S and pyrite are also used. Gypsum requirement (GR): The amount of gypsum needed for removal of exchangeable sodium from alkali soil and also to decrease the soil pH to a desired level is called gypsum requirement. 1 milli equivalent of Ca2+ is required to …Feb 6, 2019 · Gypsum can’t solve every agricultural problem, but it is a proven resource to add nutrients and improve soil structure. “It’s a great example of recycling a waste product and using it in a beneficial way,” Dick says. Dick, Professor Emeritus at The Ohio State University, presented “Crop and Environmental Benefits of Gypsum as a Soil ... The official natural resources of Jamaica are bauxite, gypsum and limestone, according to Travels.com. Wikipedia points out that aluminum oxide is another vital resource of Jamaica...Feb 6, 2019 · Gypsum can’t solve every agricultural problem, but it is a proven resource to add nutrients and improve soil structure. “It’s a great example of recycling a waste product and using it in a beneficial way,” Dick says. Dick, Professor Emeritus at The Ohio State University, presented “Crop and Environmental Benefits of Gypsum as a Soil ... An application of gypsum (calcium sulphate) to the soil will increase calcium levels in the soils and therefore flocculates the soil, which improves soil ...Gypsum is a relatively common mineral that is widely available in agricultural areas and has a number of specialized agronomic uses, principally as a Ca source on legumes and as a …Sep 17, 2009 · Step 3: Mixing the Soil. Mix the soil well, using a potato rake or pitchfork. In order for gypsum to work properly, it must be well-distributed in the top 8 to 12 inches of the soil. If possible, water the soil after the first application, and then mix it well again. Allow several days for the gypsum to become active, and then test the soil.Gypsum (CaSO4.2H2O) is the most commonly used amendment for reclamation. Elemental S and pyrite are also used. Gypsum requirement (GR): The amount of gypsum needed for removal of exchangeable sodium from alkali soil and also to decrease the soil pH to a desired level is called gypsum requirement. 1 milli equivalent of Ca2+ is required to …May 1, 2006 · The Ghanimeh soil contained gypsum, but the other two soils did not. In order to study the effects of gypsum, the latter two soils were treated with ground AR gypsum, either 10% physically mixed with the soil, or 6% precipitated into the soil as follows. Five litres of 0.014 M CaSO 4 were added to 200 g air-dry soil and mixed. The suspension ...The change in appearance which gypsum undergoes on heating provides a useful means of detecting it and assessing its abundance when it is present as small grains in soils and sediments, providing the grains are visible to the naked eye. The test can be carried out in the field by simply heating small samples of the soil or sediment on a metal ...Sprinkle the gypsum powder into the mixing water evenly but quickly, i.e. within about 10 seconds. When the powder and water come into contact for the first time, the time interval begins. The powder should be soaked for 20 seconds before it starts to mix. Once the mixture has been thoroughly mixed, it is ready to be applied to the surface of ...Gypsum is neutral in pH and will not affect soil acidity. In the absence of a soil analysis, use the recommended rates below. Lawns: In spring, apply 5-20 lbs ...Quick Answer. For those of you eager for a quick answer, experts generally recommend applying gypsum at a rate of 1 to 2 pounds per tomato plant. However, this amount can vary depending on several factors, like soil type and the specific needs of your tomato variety. Keep reading to delve into the nuances and get a tailored plan for your …The change in appearance which gypsum undergoes on heating provides a useful means of detecting it and assessing its abundance when it is present as small grains in soils and sediments, providing the grains are visible to the naked eye. The test can be carried out in the field by simply heating small samples of the soil or sediment on a metal ...In the past and in many “Soils” books magnesium and calcium were put in the same category concerning effects on soil physical properties. The reasoning was that they both had two positive charges. In recent years, these ideas have changed. Magnesium has a greater attraction for water and thus has a larger hydrated radius than […]In the past and in many …Gypsum (calcium sulphate dihydrate) causes the small particles found in clay soil to flocculate to create larger particles. In doing so, this enables better ...

Mar 8, 2018 · Under such temperatures, gypsum can release its constitutional water with a total or partial transformation into bassanite (CaSO 4 ·1/2H 2 O) and anhydrite (CaSO 4) in unknown proportions. These transformations imply a 16 and 21% loss of the initial gypsum mass, respectively, yet likely go unnoticed when analyzing soils low in gypsum. . What motivates you to do a great job at work

gypsum in soil

Mar 1, 2018 · The Determination of Gypsum in Soils. J. Herrero, O. Artieda, D. Weindorf. Published 1 March 2018. Environmental Science, Agricultural and Food Sciences. Soil Science Society of America Journal. We present the Chapter about the Soil Gypsum Determination that appeared in the Methods of Soil Analysis, published in an electronic format (available ...Soil processes, gypsum and calcite micromorphology, and soil classifications were different during the gradient that showed role of topography and climate in soil formation. View.19 Jan 2021 ... Fill a lawn spreader with the recommended amount of gypsum and walk back and forth across your lawn to spread the gypsum, advises Espoma. For ...Gypsum dissolves in water to release Ca²⁺ and SO₄²⁻, with no significant direct impact on soil pH. In contrast, limestone will neutralize acidity in low- pH soils. In regions with acid subsoils, growers sometimes use it as a relatively soluble source of Ca for alleviation of aluminum toxicity. Some soils benefit from application of ...Gypsum is known to improve the plant productivity (Scott et al., 1993), enhances nutrient availability to plants (Vyshpolsky et al., 2010), improves soil moisture content by altering water holding capacity (Al-Oudat et al., 1998), improves soil structure, infiltration rate and enhances water movements in soil (Chi et al., 2012) and also promotes the root system …In studies of soil genesis, micromorphology is a powerful tool for determining a pedogenic origin for gypsum, in spite of the difficulties pointed out in this chapter. In addition, micromorphology can also help to understand and predict the behaviour of soils containing gypsum for agricultural, environmental and civil engineering land uses.29 Jun 2017 ... BENEFITS OF GYPSUM · Replenishes calcium and sulfur which are essential macronutrients not typically applied during fertilization · Can be used ....Feb 10, 2024 · For Soil Conditioning: Apply gypsum at a rate of 20-50 pounds per 1,000 square feet to improve soil structure. It can be applied directly to the soil surface and watered in. For Saline Soils: To combat soil salinity, a heavier application may be required, followed by deep watering to leach away the salts. 3 Nov 2020 ... The correct answer is Soil with excessive clay content. The chemical formula of gypsum is CaSO4.2H2O. Gypsum is used for treating the soil ...The way it works is this: in acidic soils, gypsum will increase the pH levels. This can be a great way to provide better soil quality to a wide variety of crops ...Soil Science Society of America Journal publishes basic and applied soil research covering all areas of soil science in agricultural, forest, wetlands, and urban settings. Abstract A rapid, semiquantitative method (I) and a quantitative method (II) are proposed for the determination of gypsum in soils.Riding a 50cc (cubic centimeter) dirt bike can be exhilarating, convenient and efficient. These bikes are the most powerful you can ride without a special license, and they are gas...Jul 21, 2023 · Significant reduction in soil pH, EC, ESP and increased organic carbon content due to application of EMSWC composts in combination with reduced dose of gypsum (T 6) over rest of the treatments may ....

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