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occurance of gypsum in brazil :

SciELO - Brasil - High rates of agricultural gypsum affect ...

INTRODUCTION. The soils of the Cerrado biome extend over about 22% of the Brazilian territory (more than 2 million km 2).In their natural condition, they are characterized by high acidity, low fertility, high P adsorption and seasonal water deficit (Lopes and Cox 1977 Lopes, A. S., and Cox, F. R. (1977).A survey of the fertility status of surface soils under “Cerrado” vegetation in Brazil.

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Crop Response to Gypsum Application to Subtropical

2018-1-12  gypsum in tropical soils must be different from those observed in subtropical soils under no-till system, and these soil critical limits may vary according to the crop and the occurrence of water deficit. This paper reports a systematic review of studies on the effect of gypsum on crop yield in South of Brazil. The study aimed to analyze the

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Crop Response to Gypsum Application to Subtropical Soils ...

2021-11-23  ABSTRACT The use of gypsum to improve the root environment in tropical soils in the southeastern and central-western regions of Brazil is a widespread practice with well-established recommendation criteria. However, only recently gypsum began to be used on subtropical soils in South of Brazil, so available knowledge of its effect on crop yield is incipient and mainly for soils under no-till ...

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(PDF) Crop Response to Gypsum Application to

However, only recently gypsum began to be used on subtropical soils in South of Brazil, so available knowledge of its effect on crop yield is incipient and mainly for soils under no-till (NT) systems.

Read More
Residual Effect of Gypsum and Nitrogen Rates on Black

2021-7-21  The experiment was set up in 2009, in Guarapuava, Paraná, Brazil (25º23′ S, 51º30′ W, altitude 1026 m), where the climate is humid subtropical mesothermic (Cfb—Köppen) (Alvares et al., 2013).The field was cultivated under the continuous no-till system for more than 11 years prior to the growing seasons of 2015 and 2016, which is the period considered for the present study.

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Syngenetic and diagenetic features of evaporite-lutite ...

2016-12-1  The Ipubi Formation in the Araripe Basin (Northeast Brazil) has evaporite-lutite successions rich in gypsum, a mineral of great regional economic relevance, a highlighted stratigraphic mark, and also a natural boundary for underlying successions potentially analogous to “Pre-Salt” hydrocarbon reservoirs of the Brazilian coastal basins.

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Diversity of arbuscular mycorrhizal fungi in a gypsum ...

2011-2-10  impact of gypsum mining on the occurrence and diversity of AMF in “caatinga” areas of the Brazilian semiarid region. Material and methods Native and mining impacted caatinga areas located at Araripina, Pernam-buco state (7 o29’00” S, 40 36’00” W) in Brazil were selected. The region is

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Physical and Mechanical Properties of Gypsum-Like Rock ...

In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse, and other disasters, bringing serious challenges to the safe construction of the tunnel. Therefore, in this paper, four groups of samples under different moisture content are tested by ...

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Origin and diagenesis of gypsum and anhydrite Journal

This primary gypsum is replaced, with burial, by anhydrite at a temperature of 42 degrees C and theoretical depth of 2,000 feet. Anhydrite (metagypsum) occurs as beds and pore-fillings. Uplift and removal of overburden cause anhydrite to be replaced by gypsum. Variations in texture distinguish bedded, void-filling, and replacement anhydrite.

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Occurrence of uranium in Chinese coals and its emissions ...

2016-2-15  The uranium content of gypsum is slightly higher than that of limestone, and they are about 1/3 of uranium content in coal. The difference of gypsum and limestone may due to that trace amounts of uranium oxide in flue gas dissolved in the FGD slurry and formed soluble uranium containing substances, and then these substances were absorbed by gypsum.

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SciELO - Brasil - High rates of agricultural gypsum affect ...

INTRODUCTION. The soils of the Cerrado biome extend over about 22% of the Brazilian territory (more than 2 million km 2).In their natural condition, they are characterized by high acidity, low fertility, high P adsorption and seasonal water deficit (Lopes and Cox 1977 Lopes, A. S., and Cox, F. R. (1977).A survey of the fertility status of surface soils under “Cerrado” vegetation in Brazil.

Read More
Crop Response to Gypsum Application to Subtropical Soils ...

2021-11-23  ABSTRACT The use of gypsum to improve the root environment in tropical soils in the southeastern and central-western regions of Brazil is a widespread practice with well-established recommendation criteria. However, only recently gypsum began to be used on subtropical soils in South of Brazil, so available knowledge of its effect on crop yield is incipient and mainly for soils under no-till ...

Read More
Residual Effect of Gypsum and Nitrogen Rates on Black

2021-7-21  The experiment was set up in 2009, in Guarapuava, Paraná, Brazil (25º23′ S, 51º30′ W, altitude 1026 m), where the climate is humid subtropical mesothermic (Cfb—Köppen) (Alvares et al., 2013).The field was cultivated under the continuous no-till system for more than 11 years prior to the growing seasons of 2015 and 2016, which is the period considered for the present study.

Read More
SciELO - Brasil - Crop Response to Gypsum Application to ...

Gypsum for agricultural use is a byproduct of the phosphate fertilizer industry and broadly available in Brazil (Caires et al., 2011a Caires EF, Joris HAW, Churka S. Long-term effects of lime and gypsum additions on no-till corn and soybean yield and soil chemical properties in southern Brazil. Soil Use Manage. 2011a;27:45-53. https://doi.org ...

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Crop Response to Gypsum Application to Subtropical Soils ...

However, only recently gypsum began to be used on subtropical soils in South of Brazil, so available knowledge of its effect on crop yield is incipient and mainly for soils under no-till (NT) systems. Avaiable studies span a wide range of responses, from a substantial increase to a slight reduction in crop yield.

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Study of the agricultural gypsum as an inhibitor of the ...

The practice of feeding poultry manure to ruminants during the last 25 years have intensified the occurrence of botulism in Brazil. The objective of this study was to analyse the effect of agricultural gypsum in the inhibition of botulinus toxin in experimentally inoculated poultry litter. The study was conducted in a completely randomized design with 5 treatments and 6 repetitions.

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Diversity of arbuscular mycorrhizal fungi in a gypsum ...

2011-2-10  impact of gypsum mining on the occurrence and diversity of AMF in “caatinga” areas of the Brazilian semiarid region. Material and methods Native and mining impacted caatinga areas located at Araripina, Pernam-buco state (7 o29’00” S, 40 36’00” W) in Brazil were selected. The region is

Read More
'High-gypsum Byproducts as Soil Amendments for ...

2014-5-14  Gypsum was compared to lime as a Ca source for blueberry (Vaccinium sp.) on upland mineral soils to separate out the pH effect of added lime; gypsum has little, if any, affect on soil pH (Korcak, 1992). Although the blueberry is consid-ered an acid-loving plant, the results indicate a short-term tolerance for increased soil Ca from gypsum.

Read More
Origin and diagenesis of gypsum and anhydrite Journal

This primary gypsum is replaced, with burial, by anhydrite at a temperature of 42 degrees C and theoretical depth of 2,000 feet. Anhydrite (metagypsum) occurs as beds and pore-fillings. Uplift and removal of overburden cause anhydrite to be replaced by gypsum. Variations in texture distinguish bedded, void-filling, and replacement anhydrite.

Read More
Probability of occurrence of the Brazilian spotted fever ...

Abstract. Brazilian spotted fever (BSF) is a fatal zoonosis because of the difficulties in its early diagnosis and treatment. Occurrences of BSF in the northeast of the state of Paraná prompted investigation of areas at risk of this rickettsiosis in the municipalities of Japira, Jaboti, Pinhalão and Tomazina.

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SciELO - Brasil - High rates of agricultural gypsum affect ...

INTRODUCTION. The soils of the Cerrado biome extend over about 22% of the Brazilian territory (more than 2 million km 2).In their natural condition, they are characterized by high acidity, low fertility, high P adsorption and seasonal water deficit (Lopes and Cox 1977 Lopes, A. S., and Cox, F. R. (1977).A survey of the fertility status of surface soils under “Cerrado” vegetation in Brazil.

Read More
Residual Effect of Gypsum and Nitrogen Rates on Black

2021-7-21  The experiment was set up in 2009, in Guarapuava, Paraná, Brazil (25º23′ S, 51º30′ W, altitude 1026 m), where the climate is humid subtropical mesothermic (Cfb—Köppen) (Alvares et al., 2013).The field was cultivated under the continuous no-till system for more than 11 years prior to the growing seasons of 2015 and 2016, which is the period considered for the present

Read More
(PDF) Crop Response to Gypsum Application to

However, only recently gypsum began to be used on subtropical soils in South of Brazil, so available knowledge of its effect on crop yield is incipient and

Read More
Syngenetic and diagenetic features of evaporite-lutite ...

2016-12-1  The Ipubi Formation in the Araripe Basin (Northeast Brazil) has evaporite-lutite successions rich in gypsum, a mineral of great regional economic relevance, a highlighted stratigraphic mark, and also a natural boundary for underlying successions potentially analogous to “Pre-Salt” hydrocarbon reservoirs of the Brazilian coastal basins.

Read More
Gypsum effects on eucalyptus nutrition in subtropical Brazil

Gypsum effects on eucaly ptus nutrition in subtr opical Brazil Efeitos da aplicação de ges so na nutrição de e ucalipto no Brasil s ubtropical DOI:10.34117/bj dv6n5-099

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SciELO - Brasil - GYPSUM AND PHOSPHORUS IN

The application of gypsum reduces Mg and K foliar contents and increases Ca, Z, and Mn contents in the two crops. Gypsum increases the SPAD index in soybean plants. The increase in the gypsum doses leads to a N - K ratio unbalance in corn leaves and reduces the crop leaf area. Doses of P and gypsum do not influence yields of soybean and corn crops.

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Radiochemical characterization of Brazilian

2015-3-30  Radiochemical characterization of Brazilian phosphogypsum B. Mazzilli*, V. Palmiro, C. Saueia, M.B. Nisti Instituto de Pesquisas Energeticas e Nucleares, Caixa Postal 11049, SaJo Paulo, Brazil Received 10 April 1999; accepted 2 September 1999 Abstract This work aims to determine the activity concentrations of the radionuclides in the natural

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'High-gypsum Byproducts as Soil Amendments for ...

2014-5-14  Gypsum was compared to lime as a Ca source for blueberry (Vaccinium sp.) on upland mineral soils to separate out the pH effect of added lime; gypsum has little, if any, affect on soil pH (Korcak, 1992). Although the blueberry is consid-ered an acid-loving plant, the results indicate a short-term tolerance for increased soil Ca from gypsum.

Read More
(PDF) Physical and Mechanical Properties of Gypsum-Like ...

2021-11-1  In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse ...

Read More
Physical and Mechanical Properties of Gypsum-Like Rock ...

In the process of tunnel construction, gypsum rock is often encountered, and the volume of gypsum rock expands when encountering water, which is easy to cause the occurrence of rock fall, collapse, and other disasters, bringing serious challenges to the safe construction of the tunnel. Therefore, in this paper, four groups of samples under different moisture content are

Read More
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