Improved method for removing siderite by in situ acidification before elemental and isotope analysis of soil organic carbon

2018 ◽  
Vol 182 (1) ◽  
pp. 82-91
Author(s):  
Olga Vindušková ◽  
Kateřina Jandová ◽  
Jan Frouz
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Isotope Analysis ◽  
Improved Method

scholarly journals Incorporation of globally available datasets into the roving cosmic-ray neutron probe method for estimating field-scale soil water content

2016 ◽  
Vol 20 (9) ◽  
pp. 3859-3872 ◽  
Author(s):  
William Alexander Avery ◽  
Catherine Finkenbiner ◽  
Trenton E. Franz ◽  
Tiejun Wang ◽  
Anthony L. Nguy-Robertson ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Water Content ◽  
Bulk Density ◽  
Soil Water Content ◽  
Cosmic Ray ◽  
Soil Bulk Density ◽  
Local Soil ◽  
Calibration Parameters

Abstract. The need for accurate, real-time, reliable, and multi-scale soil water content (SWC) monitoring is critical for a multitude of scientific disciplines trying to understand and predict the Earth's terrestrial energy, water, and nutrient cycles. One promising technique to help meet this demand is fixed and roving cosmic-ray neutron probes (CRNPs). However, the relationship between observed low-energy neutrons and SWC is affected by local soil and vegetation calibration parameters. This effect may be accounted for by a calibration equation based on local soil type and the amount of vegetation. However, determining the calibration parameters for this equation is labor- and time-intensive, thus limiting the full potential of the roving CRNP in large surveys and long transects, or its use in novel environments. In this work, our objective is to develop and test the accuracy of globally available datasets (clay weight percent, soil bulk density, and soil organic carbon) to support the operability of the roving CRNP. Here, we develop a 1 km product of soil lattice water over the continental United States (CONUS) using a database of in situ calibration samples and globally available soil taxonomy and soil texture data. We then test the accuracy of the global dataset in the CONUS using comparisons from 61 in situ samples of clay percent (RMSE  =  5.45 wt %, R2  =  0.68), soil bulk density (RMSE  =  0.173 g cm−3, R2  =  0.203), and soil organic carbon (RMSE  =  1.47 wt %, R2  =  0.175). Next, we conduct an uncertainty analysis of the global soil calibration parameters using a Monte Carlo error propagation analysis (maximum RMSE  ∼  0.035 cm3 cm−3 at a SWC  =  0.40 cm3 cm−3). In terms of vegetation, fast-growing crops (i.e., maize and soybeans), grasslands, and forests contribute to the CRNP signal primarily through the water within their biomass and this signal must be accounted for accurate estimation of SWC. We estimated the biomass water signal by using a vegetation index derived from MODIS imagery as a proxy for standing wet biomass (RMSE  <  1 kg m−2). Lastly, we make recommendations on the design and validation of future roving CRNP experiments.

In-situ trash management induced sustainability of soil health to produce the qualitative products

2020 ◽  
Vol 5 (02) ◽  
pp. 249-254
Author(s):  
Rajendra Bairwa ◽  
Mamta . ◽  
Devi Lal Dhaker ◽  
Neeraj Bagoria
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Crop Residues ◽  
Animal Health ◽  
Soil Health ◽  
Important Indicator ◽  
Environment Quality ◽  
Sugarcane Yield ◽  
Grazing Lands

In-situ trash management is necessary to cut the atmosphere pollution as well as replenishment of plant nutrient. Burning of crop residues leads to release of soot particles and smoke causing human and animal health problems. It also leads to emission of greenhouse gases namely carbon dioxide, methane and nitrous oxide, causing global warming and loss of plant nutrients like N, P, K and S. Soils of the world’s agro ecosystems (i.e., croplands, grazing lands, rangelands) are depleted of their soil organic carbon (SOC) stock by 25-75% depending on climate, soil type, historic management and the magnitude of this loss may be 10 to 50 Mg C ha-1. Integrated sugarcane trash management (ISTM), microbial enriched (Trichoderma viridae) and farm yard manure is effective in enhancing the soil health and sugarcane yield. Soil organic carbon is the most important attribute and chosen as the most important indicator of soil and environment quality and agricultural sustainability.

Sign in / Sign up

Export Citation Format

Share Document