Relevant bibliographies by topics / Calcareous soils Testing

Academic literature on the topic 'Calcareous soils Testing'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Calcareous soils Testing"

1

Rogers, Christopher W., Biswanath Dari, and April Leytem. "Soil phosphorus testing on alkaline calcareous soils." Crops & Soils 52, no. 5 (September 2019): 36–38. http://dx.doi.org/10.2134/cs2019.52.0510.

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2

YEE, A. R., and K. BROERSMA. "THE BRAY, MEHLICH AND KELOWNA SOIL P TESTS AS AFFECTED BY SOIL CARBONATES." Canadian Journal of Soil Science 67, no. 2 (May 1, 1987): 399–404. http://dx.doi.org/10.4141/cjss87-035.

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A study was conducted with five soil P tests (Bray P1 (1:10), Bray P1 (1:50), Mehlich II, Kelowna I and Kelowna II) to determine the effect of soil carbonates on postextraction pH and on the correlation between soil and plant P concentration. Alfalfa (Medicago sativa L.) was grown on five calcareous and six noncalcareous soils fertilized at 0 and 90 μg P mL−1 in a growth room experiment. The ability of the extradants to maintain a low pH with calcareous soils was poorest for the Bray P1 (1:10) followed by the Mehlich II, Kelowna I, Kelowna II and Bray P1 (1:50). The Bray P1 (1:10) did not give a statistically significant correlation coefficient between soil and plant P concentration with the calcareous soils, while the other methods did. Key words: Soil testing, calcareous soils, Bray P1, Mehlich II, Kelowna I, Kelowna II
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3

Ismael, Nabil F., A. M. Jeragh, O. A. Khalidi, and M. A. Mollah. "Correlation between standard penetration test values and overburden pressure for desert sands." Canadian Geotechnical Journal 25, no. 3 (August 1, 1988): 590–94. http://dx.doi.org/10.1139/t88-064.

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The influence of the effective overburden pressure on the standard penetration test (SPT) values in calcareous desert sands is examined by field tests. A simple field testing procedure is proposed and employed in Kuwait at five sites having different relative densities for the surface soils. The correction factors for the SPT are determined from test results and compared with the most reliable correlations for clean silica sand. Key words: field tests, plate bearing tests, overburden pressure, standard penetration test, correction factors, relative density, calcareous soils, shear strength, compressibility.
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4

Lamberts, Mary, Stephen K. O'Hair, Edward Hanlon, and George Hochmuth. "Findings from a Three-year Crop Nutrient Study with Four Vegetable Crops in Dade Country, Florida." HortScience 33, no. 3 (June 1998): 535a—535. http://dx.doi.org/10.21273/hortsci.33.3.535a.

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A 3-year replicated fertility trial with four vegetable crops was begun in the 1993–94 season to: a) determine crop nutrient requirements for four vegetable crops (bush bean, malanga (Xanthosoma caracu), potato, and sweet corn, and b) to develop and calibrate a soil testing procedure for the local calcareous soils. Soils were found to test medium to high for both phosphorus and potassium. Responses to nitrogen varied by crop. Specific results and follow up trials with growers will be discussed.
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5

Najafi-Ghiri, Mahdi, Marzieh Mokarram, and Hamid Reza Owliaie. "Prediction of soil clay minerals from some soil properties with use of feature selection algorithm and ANFIS methods." Soil Research 57, no. 7 (2019): 788. http://dx.doi.org/10.1071/sr18352.

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Researchers use different methods to investigate and quantify clay minerals. X-ray diffraction is a common and widespread approach for clay mineralogy investigation, but is time-consuming and expensive, especially in highly calcareous soils. The aim of this research was prediction of clay minerals in calcareous soils of southern Iran using a feature selection algorithm and adaptive neuro-fuzzy inference system (ANFIS) methods. Fifty soil samples from different climatic regions of southern Iran were collected and different climatic, soil properties and clay minerals were determined using X-ray diffraction. Feature selection algorithms were used for selection of the best feature subset for prediction of clay mineral types along with two sets of training and testing data. Results indicated that the best feature subset by Best-First for prediction of illite was cation exchange capacity (CEC), sand, total potassium, silt and agroclimatic index (correlation coefficient (R) = 0.99 for training and testing data); for smectite was precipitation, temperature, evapotranspiration and CEC (R = 0.89 and 0.87 for training and testing data respectively); and for palygorskite was precipitation, temperature, evapotranspiration and calcium carbonate equivalent (CCE) (R = 0.98 for training and testing data). An attempt was made to predict clay minerals type by ANFIS using selected data from the feature selection algorithm. The evaluation of method by calculating root mean square error (RMSE), mean absolute error (MAE) and R indicated that the ANFIS method may be suitable for illite, chlorite, smectite and palygorskite prediction (RMSE, MAE and R of 0.001–0.028, 0.004–0.012 and 0.67–0.89 respectively for training and testing data). Comparison of data for all clay minerals showed that ANFIS method did not predict illite and chlorite as well as other minerals in the studied soils.
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6

Mylavarapu, R. S. "Diagnostic Nutrient Testing." HortTechnology 20, no. 1 (February 2010): 19–22. http://dx.doi.org/10.21273/horttech.20.1.19.

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Recommendations made for nutrient applications have traditionally focused on economic yield and quality. However, present-day testing procedures and recommendations are required to simultaneously ensure economical and environmental sustainability of agricultural production systems. A soil test is a calibrated index relating crop response to applied nutrients. Any application rate devoid of an economical response in yield or quality is deemed unnecessary. Therefore, a soil test becomes the first step in any nutrient best management practice (BMP) development, implementation, and monitoring activity. Certain significant areas in Florida, such as calcareous soils, require development of calibrated soil tests rather urgently. Nutrient sufficiency of perennial crops and deficiency diagnostics can be gauged through in-season plant tissue testing. Nutrient delivery for correcting the deficiency through foliar sprays is not always effective, and may require multiple applications. Spectral reflectance methods show significant promise as an alternative to traditional wet chemistry analyses with regard to ease, costs, and speed with wider range of applications, including natural resources. Additional research is needed to develop this technology for field-scale applications. Current research is focusing on environmental nutrient management to include nutrient sources, application rates and timing, nutrient uptake efficiency, retention capacity of soils, estimating and minimizing nutrient losses to the environment, etc. Nutrient loss assessments tools such as the Florida phosphorus (P) index and bahia (Paspalum notatum) and citrus (Citrus spp.) tests for P are now being made possible in Florida through integration of soil and tissue testing methods. Development and improvements of such analytical methods and tools specific to Florida to include other nutrients, heavy metals, soil capacity, and ecosensitive regions, is vital to ensure sustainability to the state's tourism, agriculture, and urban-rural balance.
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7

Hawkins, A. B., and G. M. Pinches. "Timing and Correct Chemical Testing of Soils/Weak Rocks." Geological Society, London, Engineering Geology Special Publications 2, no. 1 (1986): 273–77. http://dx.doi.org/10.1144/gsl.1986.002.01.49.

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AbstractExperiments to explain the rise in the floor of a hospital built on calcareous black pyritic shales have substantiated the reported chemical changes which bring about the formation of selenite (gypsum) along bedding planes. The experiments have also indicated that the sulphate content of a weak rock is not constant and depends on the weathering state.If the long-term importance of sulphates is to be determined there is strong evidence that it is the maximum potential S03 or total sulphur that should be assessed as this would be more beneficial than simply acquiring the S03% as is currently done in most site investigations.Although BS5930 recommends that sulphate and pH testing is carried out as soon as possible after the sample has been taken, it does not give any cautionary note to indicate that the soil chemistry is likely to change with exposure. Experiments are described to show the effect of this change with time.
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8

Zhu, Qiang, Yuncong C. Li, Rao S. Mylavarapu, Kelly Morgan, and Mingjian Geng. "Comparison of Extractants for Calibrating Phosphorus Application Rates in a Calcareous Soil." HortScience 54, no. 8 (August 2019): 1391–96. http://dx.doi.org/10.21273/hortsci13784-18.

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Preplant soil testing is essential for optimizing phosphorus (P) fertilization and minimizing the potential for soil P losses. Currently, there is no effective soil P extractant for calcareous soils in Florida. This study was conducted to compare Mehlich-3, ammonium bicarbonate–diethylenetriaminepentaacetic acid (AB-DTPA), and Olsen for evaluating P availability, estimating soil-test P (STP) critical levels, and calibrating P application rates for fresh-market tomato (Solanum lycopersicum L.) production in a calcareous soil. Tomatoes were grown during Winter 2014 and 2015 with P application rates of 0, 29, 49, 78, 98, and 118 kg·ha‒1 P. Water-extractable P (water-P) and dissolved reactive P (DRP) in leachate were used to determine the STP change point of leaching potential. Results showed the greatest correlation occurred between Mehlich-3 and Olsen of the three STP extractants. For Mehlich-3-P, the medium STP level (producing 75% to 90% relative yield) was predicted from 76 to 89 mg·kg‒1 and the change point was predicted at 88 or 104 mg·kg‒1 by split-line models. The P requirement was calculated from 52 to 112 kg·ha‒1 when Mehlich-3-P was rated as low level (producing 50% to 75% relative yield), which was from 42 to 76 mg·kg‒1. The multiple regression models using AB-DTPA-P and Olsen-P could not predict either the medium STP level or the practical P application rates for the low level. Consequently, based on 2 years of data, Mehlich-3 was the most effective extractant for estimating soil P availability and calibrating P rates in calcareous soils with an extremely high calcium carbonate (CaCO3) content.
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9

McBeath, T. M., M. J. McLaughlin, R. D. Armstrong, M. Bell, M. D. A. Bolland, M. K. Conyers, R. E. Holloway, and S. D. Mason. "Predicting the response of wheat (Triticum aestivum L.) to liquid and granular phosphorus fertilisers in Australian soils." Soil Research 45, no. 6 (2007): 448. http://dx.doi.org/10.1071/sr07044.

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Liquid forms of phosphorus (P) have been shown to be more effective than granular P for promoting cereal growth in alkaline soils with high levels of free calcium carbonate on Eyre Peninsula, South Australia. However, the advantage of liquid over granular P forms of fertiliser has not been fully investigated across the wide range of soils used for grain production in Australia. A glasshouse pot experiment tested if liquid P fertilisers were more effective for growing spring wheat (Triticum aestivum L.) than granular P (monoammonium phosphate) in 28 soils from all over Australia with soil pH (H2O) ranging from 5.2 to 8.9. Application of liquid P resulted in greater shoot biomass, as measured after 4 weeks’ growth (mid to late tillering, Feeks growth stage 2–3), than granular P in 3 of the acidic to neutral soils and in 3 alkaline soils. Shoot dry matter responses of spring wheat to applied liquid or granular P were related to soil properties to determine if any of the properties predicted superior yield responses to liquid P. The calcium carbonate content of soil was the only soil property that significantly contributed to predicting when liquid P was more effective than granular P. Five soil P test procedures (Bray, Colwell, resin, isotopically exchangeable P, and diffusive gradients in thin films (DGT)) were assessed to determine their ability to measure soil test P on subsamples of soil collected before the experiment started. These soil test values were then related to the dry matter shoot yields to assess their ability to predict wheat yield responses to P applied as liquid or granular P. All 5 soil test procedures provided a reasonable prediction of dry matter responses to applied P as either liquid or granular P, with the resin P test having a slightly greater predictive capacity on the range of soils tested. The findings of this investigation suggest that liquid P fertilisers do have some potential applications in non-calcareous soils and confirm current recommendations for use of liquid P fertiliser to grow cereal crops in highly calcareous soils. Soil P testing procedures require local calibration for response to the P source that is going to be used to amend P deficiency.
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10

Journal, Baghdad Science. "The Effect of Organic Matter Application on Phosphorus Status in the Calcareous Soil." Baghdad Science Journal 14, no. 1 (March 5, 2017): 107–16. http://dx.doi.org/10.21123/bsj.14.1.107-116.

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A field experiment is conducted to study the effect of different levels of peat (0, 25, 50, 75, and 100 Mg ha-1 to uncropped and cropped soil to wheat. Soil samples are taken in different period of time (0, 3, 30, 60, 90, 120, and 180 days after cultivation to determine (NaHCO3-Exteractable P at 3 different depths (0-10, 10-20, and 20-30 cm). Field Experiment is conducted in a randomized complete block design (RCBD) with four replicates. Wheat, Al-Rasheed variety, is cultivated as a testing crop. The entire field is equally dived in two divisions. One of the two divisions is cultivated to wheat and the second is left uncropped. The effect of five levels of peat namely 0, 25, 50, 75, 100 Mg ha-1 is investigated. Soils are fully analyzed to determine its physical and chemical characteristics. The soil samples are collected after 3, 30, 60, 90, 120, and 180 days for determining essential parameters and indicators that reflect the effect of the level of peat applications. Sodium bicarbonate - extractable P in uncropped and cropped soils at all depths, markedly decreases with time after peat application which has been attributed to plant uptake and rapid reaction of P with soil constituents. Sodium bicarbonate - extractable P with time in soil receiving 50 Mg ha-1 in both uncropped and cropped soil linearly decreases with the time of cultivation
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Books on the topic "Calcareous soils Testing"

1

Ross, Michael S. Liquefaction potential and cyclic loading response of calcareous soils. [Honolulu]: University of Hawaii, College of Engineering, Dept. of Civil Engineering, 1995.

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2

Morioka, Brennon T. Evaluation of the static and cyclic properties of calcareous sand in a calibration chamber study. Honolulu: Hawaii Dept. of Transportation Highways Division, 1999.

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Book chapters on the topic "Calcareous soils Testing"

1

Liang, Xiaocong, Xiaobing Guo, Xin Wang, Sheng Chen, and Deyong Wang. "Correlation Analysis of CPT Test Results and the Compaction Index for Calcareous Sand." In Proceedings of GeoShanghai 2018 International Conference: Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing, 516–24. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0095-0_58.

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Conference papers on the topic "Calcareous soils Testing"

1

Hossain, Muhammad Shazzad, and Youngho Kim. "Fish Anchor Testing in the Swan River." In Offshore Technology Conference Asia. OTC, 2022. http://dx.doi.org/10.4043/31423-ms.

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Abstract OTC-28901-MS proposed the novel dynamically installed "fish" anchor in 2018, adopting a geometry taken from nature, for potential economic and safer tethering of floating facilities in deep water. Every cross section of the fish anchor shaft is elliptical, leading to very low drag resistance during free fall through the water column, and also low resistance in penetrating the seabed sediments. The padeye is fitted on the widest part of the shaft to mobilise the maximum resistance area under operational loading. The fish anchor embedment depth during dynamic installation, and capacity under both monotonic and cyclic operational loading in calcareous silt were assessed through centrifuge model tests and large deformation finite element analyses. During dynamic installation, the normalised tip embedment depth of the fish anchor was typically three times that for the torpedo anchors and 50% greater than that for the OMNI-Max anchors. Under operational loading, the fish anchor dove deeper, reaching penetrations 20 to 60% greater than achieved during installation. By contrast the torpedo anchors (for all mooring mudline inclinations) and the OMNI-Max anchors (apart from a single test with mooring mudline inclination of 0°) pulled out directly without diving, reflecting insufficient free-fall penetration in calcareous soil. This paper provides a follow up reporting the performance of the fish anchor through field tests in the Swan River, Perth. A 1/15th scale model fish anchor was fabricated with dry weight being 0.304 kN. The anchor was tested at five different locations. At two shallow water locations (water depths 1.1 and 1.9 m, respectively), the tests were performed from the Burswood and Maylands jetty. At relatively deeper water depths of 2.91∼4.73 m, the tests were performed from a barge. The riverbed soils consisted of clay, silty clay, silt and sandy silt. The impact velocities were 5.9∼11.7 m/s. The normalised tip embedment depths were even greater compared to those achieved from centrifuge tests in calcareous silt. Under operational monotonic loadings, the fish anchor dove, as opposed to pull out of the riverbed, for mooring angles ≤ 37∼47°. Interestingly, in contrast to non-diving torpedo and suction caisson anchors, the diving fish anchor resulted non-elliptical failure envelopes, which have been expressed mathematically. The ultimate capacity was 3.5∼15 times the weight of the anchor submerged in water for taught and catenary moorings.
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