Changes in soil physical properties and organic carbon status at the topsoil horizon of a vertisol of central India after 28 years of continuous cropping, fertilization and manuring

2007 ◽  
Vol 119 (1-2) ◽  
pp. 127-134 ◽  
Author(s):  
Kuntal M. Hati ◽  
Anand Swarup ◽  
A.K. Dwivedi ◽  
A.K. Misra ◽  
K.K. Bandyopadhyay
Keyword(s):  
Organic Carbon ◽  
Physical Properties ◽  
Central India ◽  
Soil Physical Properties ◽  
Continuous Cropping

scholarly journals Surface-Applied Biosolids Enhance Soil Organic Carbon and Nitrogen Stocks but Have Contrasting Effects on Soil Physical Quality

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Virginia L. Jin ◽  
Kenneth N. Potter ◽  
Mari-Vaughn V. Johnson ◽  
R. Daren Harmel ◽  
Jeffrey G. Arnold
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Physical Properties ◽  
Application Rate ◽  
Soil Physical Properties ◽  
Site Specific ◽  
Long Term Treatment ◽  
C Stocks ◽  
Soc Stocks

Mid- to long-term impacts of land applying biosolids will depend on application rate, duration, and method; biosolids composition; and site-specific characteristics (e.g., climate, soils). This study evaluates the effects of surface-broadcast biosolids application rate and duration on soil organic carbon (SOC) stocks, soil aggregate stability, and selected soil hydraulic properties in a municipally operated, no-till forage production system. Total SOC stocks (0–45 cm soil) increased nonlinearly with application rate in perennial grass fields treated for 8 years with 0, 20, 40, or 60 Mg of Class B biosolids (DM) ha−1 yr−1(midterm treatments). Soil organic C stocks in long-term treatment fields receiving 20 years of 20 Mg ha−1 yr−1were 36% higher than those in midterm fields treated at the same rate. Surface-applying biosolids had contrasting effects on soil physical properties. Soil bulk density was little affected by biosolids applications, but applications were associated with decreased water-stable soil aggregates, increased soil water retention, and increased available water-holding capacity. This study contrasts the potential for C storage in soils treated with surface-applied biosolids with application effects on soil physical properties, underscoring the importance of site-specific management decisions for the beneficial reuse of biosolids in agricultural settings.

Soil physical properties and their relations to organic carbon pools as affected by land use in an alpine pastureland

Geoderma ◽  
2007 ◽  
Vol 139 (1-2) ◽  
pp. 98-105 ◽  
Author(s):  
Xiao-Gang Li ◽  
Feng-Min Li ◽  
Rengel Zed ◽  
Zheng-Yan Zhan ◽  
Bhupinderpal-Singh
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Physical Properties ◽  
Soil Physical Properties ◽  
Carbon Pools

scholarly journals Organic farming and cover crops as an alternative to mineral fertilizers to improve soil physical properties

2015 ◽  
Vol 29 (4) ◽  
pp. 405-412 ◽  
Author(s):  
Diego Sánchez de Cima ◽  
Anne Luik ◽  
Endla Reintam
Keyword(s):  
Organic Carbon ◽  
Physical Properties ◽  
Crop Rotation ◽  
Cover Crops ◽  
Red Clover ◽  
Soil Physical Properties ◽  
Cattle Manure ◽  
Mineral Fertilizers ◽  
Organic Systems ◽  
Tillage Operations

Abstract For testing how cover crops and different fertilization managements affect the soil physical properties in a plough based tillage system, a five-year crop rotation experiment (field pea, white potato, common barley undersown with red clover, red clover, and winter wheat) was set. The rotation was managed under four different farming systems: two conventional: with and without mineral fertilizers and two organic, both with winter cover crops (later ploughed and used as green manure) and one where cattle manure was added yearly. The measurements conducted were penetration resistance, soil water content, porosity, water permeability, and organic carbon. Yearly variations were linked to the number of tillage operations, and a cumulative effect of soil organic carbon in the soil as a result of the different fertilization amendments, organic or mineral. All the systems showed similar tendencies along the three years of study and differences were only found between the control and the other systems. Mineral fertilizers enhanced the overall physical soil conditions due to the higher yield in the system. In the organic systems, cover crops and cattle manure did not have a significant effect on soil physical properties in comparison with the conventional ones, which were kept bare during the winter period. The extra organic matter boosted the positive effect of crop rotation, but the higher number of tillage operations in both organic systems counteracted this effect to a greater or lesser extent.

Effect of management practice on properties of a Victorian red-brown earth .1. Soil physical-properties

Soil Research ◽  
1995 ◽  
Vol 33 (5) ◽  
pp. 851 ◽  
Author(s):  
MS Lorimer ◽  
LA Douglas
Keyword(s):  
Particle Size ◽  
Hydraulic Conductivity ◽  
Physical Properties ◽  
Bulk Density ◽  
Management Practices ◽  
Management Practice ◽  
Fine Sand ◽  
Soil Physical Properties ◽  
Native Forest ◽  
Continuous Cropping

The effects of five management practices (native forest, native pasture, Phalaris pasture, crop-pasture rotation, continuous cropping), that had been in place for 18 years, on some soil physical properties of a red-brown earth near Bendigo, Victoria, were studied. Particle size distribution, bulk density and hydraulic conductivity of soil in the A and B horizons at different, management sites were measured. Where cultivation had occurred, soil in the A horizon contained less silt and clay, and more fine sand and coarse sand. The bulk density of the A horizon of soil that had produced at least six wheat crops since 1969 was greater than that of soil used for pasture or forest, while the hydraulic conductivity of soil cropped every year since 1969 was much less than that of soil under native forest. Particle size distributions for soil from the B horizons at the five management sites were found to be similar. Where pastures and crops had been established, the hydraulic conductivity of the upper B horizon was lower, and the bulk density was higher, than that of soil in the native forest (Eucalyptus spp).

Freeze-thaw dynamics in synthetic permafrost soil columns with variable organic carbon content

2020 ◽  
Author(s):  
Jelte de Bruin ◽  
Victor Bense ◽  
Martine van der Ploeg
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Physical Properties ◽  
Groundwater Flow ◽  
Soil Column ◽  
Soil Physical Properties ◽  
Soil Columns ◽  
Cold Regions ◽  
Warming Climate ◽  
Permafrost Thawing

<p>Cold-regions hold a pool of organic carbon that has accumulated over many thousands to millions of years and which is currently kept immobile by permafrost. However, in a warming climate, a deepening of the active layer results in the release of greenhouse gasses CO<sub>2</sub> and CH<sub>4</sub> into the atmosphere from this carbon pool. Additionally, due to the degradation of deeper permafost, soil hydraulic properties and associated groundwater flow paths are shifting rapidly as a result of which also organic carbon in deeper permafrost is being dissolved into groundwater, which can then reach the surface environment via groundwater flow.  This provides an additional mechanism by which permafrost carbon can be mobilized in  a warming climate, and one which is likely increasingly important for progressive surface warming.</p><p>Although the process of carbon leaching from thawing organic rich permafrost layers into the groundwater is an increasingly important part of the carbon cycle of cold-regions, it is notoriously difficult to measure in situ or incorporate into numerical model assessments due to the highly heterogeneous properties of the permafrost, and lack of process knowledge. In particular, the crucial understanding of the influence of different soil physical properties such as soil grain size and organic matter content on permafrost thawing processes is missing, as well the precise release mechanisms  of organic matter into pore waters in thawing soils.</p><p>This study employs lab soil column experiments to investigate the interplay between soil physical properties and thawing dynamics of permafrost. One meter high soil columns are frozen to create controlled permafrost conditions. A range of sand grain sizes (0.1 to 0.8mm) and organic matter contents (1 to 10 wt%) representative for sedimentary permafrost are used. The column is thermally insulated on the sides and top, exposing only one face to ambient temperature in the climate chamber. In this way one-dimensional heat flow conditions are created. So far, the columns are equipped with arrays of temperature sensors. Experiments consist of a cycle of freezing and thawing. Our initial data and analysis illustrate how a fast evolving thawing front develops through the frozen soil column  including the effects of latent heat at the thawing front. Numerical modeling allows to infer the soil thermal properties relevant to model the permafrost thawing process.</p>

scholarly journals Influence of Organic Manures on Soil Physical Properties, Organic Carbon and Crop Yield in Okra-Dhaincha-broccoli Cropping Sequence

2020 ◽  
pp. 47-59
Author(s):  
Vishaw Vikas ◽  
Jag Paul Sharma ◽  
A. K. Mondal ◽  
Vikas Sharma ◽  
Abhijit Samanta ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Physical Properties ◽  
Bulk Density ◽  
Infiltration Rate ◽  
Soil Physical Properties ◽  
Positive Change ◽  
Organic Manures ◽  
Cropping Sequence ◽  
Water Holding

A study was conducted at Organic Farming Research Centre of SKUAST -Jammu during 2016 to 2017 to find out the impact of organic manures on soil organic carbon, physical and crop growth parameters Okra-Dhaincha-Broccoli cropping sequence. The Soil Organic Carbon was analyzed by Chromic acid wet digestion method. However, in soil physical properties Bulk density was analyzed by Core method, water holding capacity by Keen Rackzowski Method and Infiltration rate by Double Ring Method. In the experiment, soil organic carbon was found non-significant in experiment. Bulk density was found to be significant in year 2016 and 2017 as very captivating change was observed as compared to control; T8 as the lowest value treatment with value 1.26 g cm-3 was recorded. Water holding capacity was found to be significant in year 2016 and 2017 as very positive change was observed as compared to control as WHC with highest value 43.68% was noted in T8 in 2017. Infiltration rate was also found to be significant in year 2016-17 as very positive change was observed as compared to control. Significant improvement in root volume, root length was observed in Okra and same was noted in size of curd in broccoli as compared to control. The significant impact of organic manures on soil quality parameters will provide a new way to improve the soil health and productivity in a sustainable way.

Changes of soil organic carbon and its fractions in relation to soil physical properties in a long-term fertilized paddy

2009 ◽  
Vol 104 (2) ◽  
pp. 227-232 ◽  
Author(s):  
Seul Bi Lee ◽  
Chang Hoon Lee ◽  
Ki Yuol Jung ◽  
Ki Do Park ◽  
Dokyoung Lee ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Physical Properties ◽  
Soil Physical Properties
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