Total carbon and total nitrogen
Comparison between random forests, artificial neural networks and gradient boosted machines methods of on-line vis-NIR spectroscopy measurements of soil total nitrogen and total carbon
... Soil total nitrogen (TN) and total carbon (TC) are important fertility parameters that can be measured with on-line (mobile) visible and near infrared (vis-NIR) ...
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Organic carbon and total nitrogen stocks in soils of the Lena River Delta
... Soil Carbon Database (see Hugelius et ...the total carbon storage in per- mafrost and the seasonally thawed layer of Arctic river deltas is probably lower than previously estimated, though still of ...
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The extent of soil organic carbon and total nitrogen in forest fragments of the central highlands of Ethiopia
... 2010; Gamfeldt et al. 2013; Berenguer et al. 2014; Gelaw et al. 2014; Gurmessa et al. 2016; Tesfaye et al. 2016). It has been found that forests and their soils store about 45% of the terrestrial carbon and act as ...
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Stand heterogeneity of total carbon and nitrogen, and C/N ratio in soil of mountain meadows
... of total carbon, total nitrogen and C/N ratio in Ah-Ae-Btg-Bt horizons of Gleyic Luvisol on one mountain meadow divided into two study plots: one moderately (once a season) mown (plant ...
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Stocks and stoichiometry of soil organic carbon, total nitrogen, and total
... Distributed under a Creative Commons CC BY license.. Distributed under a Creative Commons CC BY license..[r] ...
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Spatial Distribution of Soil Organic Carbon and Total Nitrogen in a Grid Sampled Landscape
... difference resulting from soil variability. Significant soil trends can also be taken care of by using geostatistical techniques like semi- variogram and kriging, which are more suited to regular and predictable ...
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Using satellite hyperspectral imagery to map soil organic matter, total nitrogen and total phosphorus
... PLS model achieves the optimal prediction model more rapidly than PCR, and is computationally more efficient (Haaland and Thomas, 1988a; Li, 2006). Recently, several new statistical tools have been utilized for soil ...
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Assessment of soil quality using soil organic carbon and total nitrogen and microbial properties in tropical agroecosystems
... Received 12 December 2010; revised 6 February 2011; accepted 15 February 2011 ABSTRACT Assessment of soil quality is an invaluable tool in determining the sustainability and environ- mental impact of agricultural ...
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How To Choose A Total Organic Carbon Analyzer
... of nitrogen, sulfur, and carbon is shown in Figure ...5, nitrogen chemical species in the sample and their individual oxidation product interfere negatively with the membrane conductivity TOC ...
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Mass balance estimation of nitrogen, carbon, phosphorus and total suspended solids in the urban eutrophic, Pampulha reservoir, Brazil.
... of nitrogen, carbon, phosphorus and total suspended solids in the urban eutrophic, Pampulha reservoir, ...(carbon, nitrogen and phosphorus) and total suspended solids and to ...
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Novel Methods for Nitrogen-Containing Heterocycles and Applications to Total Synthesis.
... 102 (R 2 −R 4 , highlighted in green, Scheme 3.28). Thioimidate 3-59 provided thiazoline 3-80 in 60% yield. We began to notice the 5-exo/6-exo competition when examining substrates 3-60 and 3-61. Thiazoline 3-81 was ...
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Machine learning based prediction of soil total nitrogen, organic carbon and moisture content by using VIS-NIR spectroscopy
... 3 The soil mapping and classification has been historically performed through various methods, including statistical techniques such as principal components regression (PCR) (Chang, Laird, Mausbach and Hurburgh , 2001; ...
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Land-use change effects on soil organic carbon, total soil nitrogen, and soil erosion in a temperate forest and grassland
... ii Thesis abstract There are several factors that influence the retention of soil organic carbon (SOC) and total soil nitrogen (TSN) including soil texture, climate, slope length and gradient, and ...
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Measuring the biosphere-atmosphere exchange of total reactive nitrogen by eddy covariance
... Kristensen, L., Mann, J., Oncley, S. P., and Wyngaard, J. C.: How close is close enough when measuring scalar fluxes with dis- placed sensors?, J. Atmos. Ocean. Technol., 14, 814–821, 1997. Lamarque, J. F., Kiehl, J. T., ...
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EZ7621 Total Nitrogen and Total Phosphorus analyser
... The total nitrogen concentration is determined in the ‘TN’ ...The total phosphorus concentration is determined in the ‘TP ...for total nitrogen is determined in the ‘TN’ ...for ...
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DETERMINATION OF TOTAL CARBON, TOTAL ORGANIC CARBON AND INORGANIC CARBON IN SEDIMENTS
... any carbon present is converted to CO 2 ...percent carbon based on the dry sample weight. The total organic carbon content is subtracted from the total carbon content to ...
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CiteSeerX — Total body nitrogen, Total body potassium,
... question. Total body nitrogen may be a good index of nitrogen stores but within the body it probably exists in two different pools: a) intracellular nitrogen in ...
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Modeling of the Total Alkalinity and the Total Inorganic Carbon in the Mediterranean Sea
... using all the available data in the DYFAMED site in the North-Western basin of the Mediterranean Sea from 1998 to 2005. The reason for the slightly less steep slope and the less negative intercept in our correlation ...
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Environmental Kuznets Curve Using Total Nitrogen
... The total nitrogen of a country is calculated by taking the country’s total consumption of nitrogen fertilizer and dividing it by the total area of arable land and permanent crops ...
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The Determination of Total Carbon Dioxide in Water
... For the range of total carbon dioxide concentration usually required (0-50 mg./l.), the most convenient absorbent was found to be 0-005 N (approx.) sodium hydroxide solution. This was [r] ...
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