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

Land Use Ecology of Major Ecosystems in Cold Deserts of Himachal Pradesh

2015 ◽  
Vol 38 (4) ◽  
pp. 295-301
Author(s):  
Poonam ◽  
Rajan Bawa ◽  
Hari Sankhyan ◽  
D. Nayak ◽  
S.S. Sharma
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Nutrient Status ◽  
Soil Physical Properties ◽  
Himachal Pradesh ◽  
Cropping Pattern ◽  
Land Use Pattern ◽  
Maximum Area ◽  
Farming Community ◽  
Use Pattern

The present study was conducted in Goshal, one of the largest villages of Lahaul valley of Himachal Pradesh during 2010 to 2013 to study the land use pattern of village Goshal by classifying the study area into three major ecosystems viz; Forest ecosystem, alpine pasture ecosystem and agro-ecosystem and to assess the soil physical properties of these ecosystems. Land use pattern in agro ecosystem revealed that of the total area of village Goshal, maximum area was occupied under second grade irrigated area and maximum area under non cultivable lands was reported under grasslands. Pea occupied maximum per cent area which showed the shifting of the farming community from traditional cropping pattern to cash crops. It was further observed that the villagers opted plantations of poplars and willows. The soil physical properties of all the three ecosystems were found medium in available nutrient status.

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.

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.

scholarly journals KAJIAN SIFAT FISIKA TANAH BEBERAPA PENGGUNAAN LAHAN DI BUKIT GAJABUIH KAWASAN HUTAN HUJAN TROPIK GUNUNG GADUT PADANG

Jurnal Solum ◽  
2007 ◽  
Vol 4 (2) ◽  
pp. 49
Author(s):  
Yulnafatmawita Yulnafatmawita ◽  
Utri Luki ◽  
Afri Yana
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Clay Content ◽  
Soil Physical Properties ◽  
Annual Rainfall ◽  
Perennial Plant ◽  
Mixed Land Use ◽  
Mixed Field ◽  
Clay Percentage ◽  
Permeability Rate

Study about soil physical properties of Bukik Gajabuih Padang, the area receiving high annual rainfall (>5000 mm), was conducted at different land uses in 2006.  The objective of this research was to measure the change of soil physical properties as forest was cut down and converted into mixed perennial plant field and into bush land.  The results showed that changing forest area into land use for mixed perennial trees for more than 50 years increased SOM content on the top 0-20 cm, but decreased on the 20-40 cm layer.  The highest SOM content was found under bush land.  Therefore, the bulk densisty of the soil decreased from forest to mixed land use and to bush land. The opposite trend was found for total pores and permeability rate.  While the plasticity index of the soil followed the clay percentage of the soil texture, it increased by increasing clay content of soil from forest into mixed field and bush land use.Key Words: Land Use Change, Soil Organic Carbon, Soil Physical Properties

scholarly journals Soil Physical Properties of Arable Land by Land Use Across the Country

2012 ◽  
Vol 45 (3) ◽  
pp. 344-352 ◽  
Author(s):  
H.R. Cho ◽  
Y.S. Zhang ◽  
K.H. Han ◽  
H.J. Cho ◽  
J.H. Ryu ◽  
...  
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Arable Land ◽  
Soil Physical Properties

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 Variation of soil organic carbon and physical properties in relation to land uses in the Yellow River Delta, China

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shuying Jiao ◽  
Junran Li ◽  
Yongqiang Li ◽  
Ziyun Xu ◽  
Baishu Kong ◽  
...  
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Soil Quality ◽  
Yellow River ◽  
Arable Land ◽  
Yellow River Delta ◽  
Soil Physical Properties ◽  
Land Uses ◽  
Forest Land ◽  
The Yellow River Delta

AbstractSoil physical properties and soil organic carbon (SOC) are considered as important factors of soil quality. Arable land, grassland, and forest land coexist in the saline-alkali reclamation area of the Yellow River Delta (YRD), China. Such different land uses strongly influence the services of ecosystem to induce soil degradation and carbon loss. The objective of this study is to evaluate the variation of soil texture, aggregates stability, and soil carbon affected by land uses. For each land use unit, we collected soil samples from five replicated plots from “S” shape soil profiles to the depth of 50 cm (0–5, 5–10, 10–20, 20–30, and 30–50 cm). The results showed that the grassland had the lowest overall sand content of 39.98–59.34% in the top 50 cm soil profile. The content of soil aggregates > 0.25 mm (R0.25), mean weight diameter and geometric mean diameter were significantly higher in grassland than those of the arable and forest land. R0.25, aggregate stability in arable land in the top 30 cm were higher than that of forest land, but lower in the soil profile below 20 cm, likely due to different root distribution and agricultural practices. The carbon management index (CMI) was considered as the most effective indicator of soil quality. The overall SOC content and CMI in arable land were almost the lowest among three land use types. In combination with SOC, CMI and soil physical properties, we argued that alfalfa grassland had the advantage to promote soil quality compared with arable land and forest land. This result shed light on the variations of soil properties influenced by land uses and the importance to conduct proper land use for the long-term sustainability of the saline-alkali reclamation region.

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