Aug 8, 2023 · Improves acid soils and treats aluminum toxicity. 3. Improves soil structure. 4. Improves water infiltration. 5. Helps reduce runoff and erosion. The latest information on gypsum has been covered in detail at past Midwest Soil Improvement Symposiums. The event — which has been held in conjunction with The Ohio State University’s ... 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. Calcium sulfate, more commonly known as gypsum, is used on heavy clay soils throughout the Wimmera to help break down the clay and enhance the calcium component of soils. A soil is said to be sodic when there is an abundance of sodium cations bound to clay particles. This causes dispersion when wet, leading to the degradation of …Sep 9, 2023 · Gypsum can also improve soil structure by displacing sodium ions in sodic soils. Chemical Impurities: While the chemical formula for gypsum is relatively simple (CaSO4·2H2O), natural gypsum deposits may contain impurities, including small amounts of other minerals or elements. Gypsum movement into the soil profile is also influenced by soil texture, amount of organic matter, surface soil structure, residue, compaction, soil moisture condition, and the timing and volume of rainfall. Crop nutrient needs vary depending on the type of plant but most agricultural crops require between 30 to 70 pounds per acre of applied ... Nov 1, 2009 · The possibility of water release from gypsum has to be considered when soil water content is recorded using EC measures in soils containing gypsum. THERMOGRAVIMETRY. The transformation of gypsum by releasing constitutional water is well known , and has been proposed by 63, 9, and others as a method for gypsum determination. Thermo-gravimetric ...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 …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 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...Mar 8, 2018 · A common flaw in the analysis of soils containing gypsum involves drying samples at temperatures > 40°C. Under such temperatures, gypsum can release its …Sodium salts in an sodic soil are so diluted by this treatment that nearly complete displacement of exchangeable sodium by calcium from the gypsum solution occurs. The decrease in calcium from the solution when expressed on the basis of tons of CaSO 4.2H 2 O per 30 cm of soil is the gypsum requirement of the soil.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.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.Nov 9, 2021 · Gypsum Applications: Proper Use of Gypsum for Soil. Written by MasterClass. Last updated: Nov 9, 2021 • 3 min read. Gypsum is a calcium sulfate dihydrate which has many applications as a plaster and concrete additive, as well as a soil fertilizer and conditioner. Gypsum is a calcium sulfate dihydrate which has many applications as a plaster ... 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 ...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 gypsumLiquid "Gypsum" remedies sodium and/or salt problems, clay and compacted soils, soggy soils, and water drainage problems.It also addresses soil erosion and issues associated with poor or reclaimed irrigation water. Liquid "Gypsum" is a liquid formulation of calcium chloride, surfactants, penetrants, humectants, and a water soluble polyacrylamide, also …Mar 18, 2022 · If your soil is on the sandy side, you can leach large amounts of salt in a season, but more clayish soils will take longer to leach salt. Apply garden gypsum to sandy loam soils at a rate of about 40 pounds per 1,000 square feet of soil. For …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 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 … 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). Gypsum assists in creating more suitable environments for root development and nutrient absorption so plants can grow better and more easily. Gypsum is ...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 ... 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. 25kg Horticultural Gypsum / Soil Improver 25kg Bag of Horticultural Gypsum Suitable as a fertiliser and soil improver Easy to use! Used.18 171. Therefore, gypsum has a role as a source of sulfur for crop production in Midwest agriculture. However. soils that require S in a fertilizer program do not dominate the crop production systems in the Midwest. Consequently the …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 …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.Feb 22, 2011 · Gypsum has been shown to be effective at treating aluminum toxicity on soils with a pH lower than 4.5. At pH lower than 4.5, aluminum in soil overpowers the ability of …Gypsum is a mineral used in agriculture to enhance crop production and soil health. This article highlights the top five benefits of using gypsum in farming. Gypsum is a mineral used in agriculture to enhance crop production and soil health.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 ...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.May 1, 2006 · Soils with gypsum were frequently less than 25 cm deep, and had negligible concentrations of Olsen phosphorus. Values of SI40, with a maximum of 15.5 m, were primarily determined, in all types of ...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 ...Introduction. Soil salinization refers to the process of salt accumulation in terrestrial landscapes. It occurs naturally where evaporation is high relative to precipitation (there is a seasonal water deficit) and leaching is insufficient to move salts out of the soil profile (Duchaufour, 1982; Schofield & Kirkby, 2003), often in landscapes that do not drain into …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 The methods for gypsum content determination in soils are summarized and their applicability discussed.25kg Horticultural Gypsum / Soil Improver 25kg Bag of Horticultural Gypsum Suitable as a fertiliser and soil improver Easy to use! Used.6 days ago · To use gypsum, mix a kilo or 2.2 pounds of gypsum powder into 10 square feet of soil. What Does Gypsum Do? Adding gypsum changes the structure of the soil and lets the soil absorb more water, which reduces the amount of water that becomes runoff. Needless to say, this is a godsend for thick clay soils that refuse to drain. Gypsum changes the soil composition through a process called flocculation. The gypsum enables the small and dense clay particles to join together to form bigger particles, more closely resembling loose sand2. Another occasion when gypsum is often introduced in a garden setting is if the soil in your garden lacks calcium. gypsum plays a key role in soil behavior [e.g., for irrigation (Moret-Fernández and Herrero, 2015; Herrero, 2017), or civil engineering (Jha and Sivapullaiah, 2017)]. Gypsum has confounded certain lab determinations in soils, but can be easily determined. A common flaw in the analysis of soils containing gypsum involvesIn India, out of 329 million hectares of total geographical area, the arid and semi-arid occupy more than one third of the area (127.4 m ha). The salt affected soils occurring in these zones occupy 12 m ha spread over 15 states of the country. These salt affected soil zones comprise of 4.12 m ha of alkali soil, 3.26 m ha of saline soil and 4.62 m ha of saline alkali soils. Among these salt ...Dec 31, 2015 · Soils with a high enough gypsum content that their structure and function is altered (gypsum soils) have high water retention, low organic matter, and hard physical crust, which are thought to be ... 1 day ago · Gypsum is a fertilizer product and supplies the crop-available form of calcium (Ca 2 +) and sulfur (SO 4 2-). If these forms are deficient in soil, then crop productivity will benefit if gypsum is applied. This is a big "if" for Iowa soils. Research has not shown deficiency of Ca and normally any potential problem with low Ca levels is taken ...Gypsum is the most common sodic soil amendment tools due to its high solubility, lower cost, higher availability, and secure handling. Even in non-sodic soils; gypsum improves soil structure by increasing flocculation, aggregate stability, and water infiltration (Malik et al., 1991). Table1: Potential impact of gypsum application on soil Pure Gypsum 1 Ton of Soil Sulfur Gypsum CaSO4 ٠ 2H2O 1.00 5.38 Soil sulfur S 0.19 1.00 Sulfuric acid (conc.) H2SO4 0.61 3.20 Ferric sulfate Fe2(SO4)3 ٠ 9H2O 1.09 5.85 Lime sulfur (22% S) CaS 0.68 3.65 Calcium chloride CaC12 ٠ H2O 0.86 --Aluminum sulfate A12(SO4)3-- 6.34 * The percent purity is given on the bag or identification tag Sep 1, 2020 · Soil gypsum determination. Soil Science Society of America Journal 84 (5):1477-1484. Authors: J. Herrero. Octavio Artieda. Universidad de Extremadura. D.C. …Feb 9, 2021 · 1.3 Forms of Gypsum in Soils. Gypsum is a soluble salt, hydrous calcium sulphate CaSO 4. 2H 2 O. Its solubility is 2.6 g dm-3 of pure water at 25°C and a pressure 1 atmosphere. Segalen and Brion (1981) note that the solubility of gypsum is influenced by the presence of other salts in the solution. The maximum solubility occurs at 35-50°C.An application of gypsum (calcium sulphate) to the soil will increase calcium levels in the soils and therefore flocculates the soil, which improves soil ...Soil is an essential component of any garden, flower bed, or landscaping project. If you’re looking to buy soil by the truckload, there are a few options available to you. Here’s w...Mar 1, 2018 · 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 solubility, gypsum dissolves when ...Step 4: Prepare your soil for the next season. After harvest, and to protect your soil for the next season, remove the stalks and roots of harvested cannabis plants. You can compost and re-apply ...1 day ago · Gypsum is a fertilizer product and supplies the crop-available form of calcium (Ca 2 +) and sulfur (SO 4 2-). If these forms are deficient in soil, then crop productivity will benefit if gypsum is applied. This is a big "if" for Iowa soils. Research has not shown deficiency of Ca and normally any potential problem with low Ca levels is taken ...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 ...Changing pH in Soil. Soil pH directly affects the life and growth of plants because it affects the availability of all plant nutrients. Between pH 6.0 and 6.5, most plant nutrients are in their most available state. A nutrient must be soluble and remain soluble long enough to successfully travel through the soil solution into the roots.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. Gypsum is a slow-release source of sulphur and calcium which play a key role in improving soil structure, aeration and water retention. So you can grow better, healthier crops.When Gypsum dissolves, it releases equal proportions of calcium and sulphate. Calcium sulphate improves the structure and consistency in soil and most other growing media allowing better water penetration and retention ... The secondary gypsum deposits, present as gypcrete or gypsiferous soil, are developed in the upper few meters of the soil cover by different processes leading to enrichment of calcium sulfate in ... 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). 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.Jan 1, 1989 · 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 soil conditioner ... Gypsum is an important source of calcium and sulfur that nourishes the crop and the soil around it. Gypsum also counters soil acidity and treats the toxicity of aluminum. It improves the structure of your soil which helps reduce erosion. Fertpro has specialist knowledge in formulating gypsum based soil conditioners to rebuild tired and worn soils.Dec 31, 2015 · Soils with a high enough gypsum content that their structure and function is altered (gypsum soils) have high water retention, low organic matter, and hard physical crust, which are thought to be ... Traditionally, gypsum is recommended for the reclamation of sodic soils but ability to reclaim the soil depends on the quality (fineness and solubility) and quantity of gypsum used. With an idea to explore the possibilities of nanotechnology in soil reclamation and to improve the efficiency and economise the gypsum requirement, a maiden attempt was made to …Adding gypsum and/or straw is a common practice for ameliorating saline-alkali soils. However, the effect of amendment on soil CO2 is poorly known. An incubation experiment was conducted for over ...When determining the amount of leaching water to apply, the findings of Tozsin et al. (2014) were taken into consideration, as they compare the effects of waste pyrite and gypsum in soil samples ...18 171. Therefore, gypsum has a role as a source of sulfur for crop production in Midwest agriculture. However. soils that require S in a fertilizer program do not dominate the crop production systems in the Midwest. Consequently the …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 ...Gypsum is a cost effective soil conditioner and very effective in correcting high soil sodium (Na) and is also used to raise the calcium content of soils ...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.Sep 9, 2023 · Gypsum can also improve soil structure by displacing sodium ions in sodic soils. Chemical Impurities: While the chemical formula for gypsum is relatively simple (CaSO4·2H2O), natural gypsum deposits may contain impurities, including small amounts of other minerals or elements. 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).Nov 17, 2023 · Conducting a soil test is the best way to accurately determine the amount of gypsum needed. Soil testing kits are readily available in gardening stores or you can send a sample to a laboratory for a more detailed analysis. Prepare the Soil for Gypsum Application. Before applying gypsum to your clay soil, it is important to prepare the soil ... 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 ...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 …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. SDownload 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.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 ...Step 4: Prepare your soil for the next season. After harvest, and to protect your soil for the next season, remove the stalks and roots of harvested cannabis plants. You can compost and re-apply ...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 ... Agricultural rainfed areas of Pakistan have been facing several issues in recent years, e.g., soil erosion, nutrient runoff, and soil dependency on rainfall for crop growth. Wheat is considered a major staple crop in Pakistan. The main concern in these regions is to conserve soil moisture as the crop depends on the moisture obtained by rainfall. …The effective and safe use of FGD gypsum in agricultural land is still debated in some countries even though its effectiveness in soil management has been reported in many studies. Thus, the changes in the levels of soil salinity, alkalinity, crop yield, and other physicochemical properties in different soil types and crops after …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, …
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 …. Tamanawas falls
It all starts with healthy soil. Gypsum is a ‘clean green’ soil conditioner and fertiliser. As a naturally occurring mineral, derived from ancient sea deposits, gypsum supplies 23% calcium and 18% sulphate sulphur. Winstone Gypsum can be used in conventional, organic and regenerative agriculture systems. Gypsum is Bio Gro certified .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 movement into the soil profile is also influenced by soil texture, amount of organic matter, surface soil structure, residue, compaction, soil moisture condition, and the timing and volume of rainfall. Crop nutrient needs vary depending on the type of plant but most agricultural crops require between 30 to 70 pounds per acre of applied ... *For Clay Soil, INCREASE amounts by half (50%). For Sandy Soil DECREASE amounts by one-third (33%). Gypsum. Gypsum, or calcium sulphate (CaSO 4), is a naturally occurring mineral. It provides the essential nutrients calcium and sulphur but does not affect soil pH; it is neutral (pH is ~6.7). Gypsum is typically 20-22% calcium and 16-18% sulphur.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. Core Ideas We presented in Methods of Soil Analysis three easy methods for gypsum determination.May 1, 2006 · Soils with gypsum were frequently less than 25 cm deep, and had negligible concentrations of Olsen phosphorus. Values of SI40, with a maximum of 15.5 m, were primarily determined, in all types of ...Dec 15, 2006 · The composition of the sand + silt fraction of the soil (which contained all of the gypsum) before and after extraction was determined using XRD and the results are shown in Fig. 4.The gypsum peaks are reduced after extraction, the reductions by the 5 h equilibrations being more than by the 1 h extractions, showing that the gypsum content has been reduced but that …29 Jun 2017 ... BENEFITS OF GYPSUM · Replenishes calcium and sulfur which are essential macronutrients not typically applied during fertilization · Can be used ....Agricultural Gypsum (Calcium Sulfate - CaSO4) is one of those rare materials that performs in all three categories of soil treatment: an amendment, conditioner, ... 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. 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 ...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 …Nov 17, 2023 · Conducting a soil test is the best way to accurately determine the amount of gypsum needed. Soil testing kits are readily available in gardening stores or you can send a sample to a laboratory for a more detailed analysis. Prepare the Soil for Gypsum Application. Before applying gypsum to your clay soil, it is important to prepare the soil ...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. 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 …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 ...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...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 ... 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..