scholarly journals Determination of Hydraulic Conductivity Based on (Soil) - Moisture Content of Fine Grained Soils

10.5772/20369 ◽  
2011 ◽  
Author(s):  
Rainer Schuhmann ◽  
Franz Koniger ◽  
Katja Emmerich ◽  
Eduard Stefanescu ◽  
Markus Stacheder
Keyword(s):  
Soil Moisture ◽  
Hydraulic Conductivity ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Fine Grained

scholarly journals Predicting rut depth induced by an 8-wheeled forwarder in fine-grained boreal forest soils

2020 ◽  
Vol 77 (2) ◽  
Author(s):  
Jori Uusitalo ◽  
Jari Ala-Ilomäki ◽  
Harri Lindeman ◽  
Jenny Toivio ◽  
Matti Siren
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Bulk Density ◽  
Soil Moisture Content ◽  
Mineral Soil ◽  
Coarse Grained ◽  
Forest Operations ◽  
Fine Grained ◽  
Humus Layer ◽  
Cumulative Mass

Abstract Key message Rut depth in fine-grained boreal soils induced by an 8-wheeled forwarder is best predicted with soil moisture content, cumulative mass of machine passes, bulk density and thickness of the humus layer. Context Forest machines are today very heavy and will cause serious damage to soil and prevent future growth if forest operations are carried out at the wrong time of the year. Forest operations performed during the wettest season should therefore be directed at coarse-grained soils that are not as prone to soil damage. Aims The study aimed at investigating the significance of the most important soil characteristics on rutting and developing models that can be utilized in predicting rutting prior to forest operations. Methods A set of wheeling tests on two fine-grained mineral soil stands in Southern Finland were performed. The wheeling experiments were conducted in three different periods of autumn in order to get the largest possible variation in moisture content. The test drives were carried out with an 8-wheeled forwarder. Results Soil moisture content is the most important factor affecting rut depth. Rut depth of an 8-wheeled forwarder in fine-grained boreal soil is best predicted with soil moisture content, cumulative mass of machine passes, bulk density and thickness of the humus layer. Conclusion The results emphasize the importance of moisture content on the risk of rutting in fine-grained mineral soils, especially with high moisture content values when soil saturation reaches 80%. The results indicate that it is of high importance that soil type and soil wetness can be predicted prior to forest operations.

scholarly journals Determination of Soil Moisture Content using Laboratory Experimental and Field Electrical Resistivity Values

2018 ◽  
Vol 995 ◽  
pp. 012074
Author(s):  
Z A M Hazreek ◽  
S Rosli ◽  
A Fauziah ◽  
D C Wijeyesekera ◽  
M I M Ashraf ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content

scholarly journals Characterization of Biochars and Their Application Rates on Soil Moisture Retention in Light Textured Soil of Assam

2019 ◽  
pp. 1-9
Author(s):  
K. Deka ◽  
P. P. Hazarika ◽  
B. K. Medhi ◽  
Rupjyoti Borah ◽  
G. G. Kandali ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Chemical Properties ◽  
Field Capacity ◽  
Fine Grained ◽  
Application Rates ◽  
Bamboo Leaves ◽  
The One

“Biochar” is a relatively new term, yet it is not a new substance. Biochar, product of thermal decomposition or incomplete combustion of biomass or bio-wastes under limited oxygen supply, are fine-grained highly porous charcoal substances that are distinguished from other charcoals in its intended use as soil amendments. The state of Assam produces surplus quantities of biowastes and leaves behind bulk quantity of wastes soon after harvest of the main crop(s) remain unutilized annually and these farm wastes have the potential of further reutilization through production of biochar, which may effectively be used in sustainable production system. Characterization of biochar with respect to physico-chemical properties determines the suitability of biochar to conserve soil moisture, which is again regulated by kind and source of feed stock materials. Keeping these aspects in view, a study on characterization of biochars prepared from four different feed stocks, namely rice straw, rice husk, toria stover, and bamboo leaves was conducted at Assam Agricultural University during 2014-15 and 2015-16 to validate its efficiency to conserve soil moisture for longer time. After determining the physicochemical properties of the four biochars, a set of pot culture experiment in poly house taking toria as test crop was conducted with four biochars. Four hundred gram of soil (preferably light textured) in 500 g capacity of plastic pot replicated thrice was designed statistically (factorial CRD) with four doses of biochars (0, 0.5, 1.0, and 1.5% wt/wt). Initially, a moisture level at field capacity was maintained and periodical volumetric soil moisture content (upto 70 days) was monitored to evaluate their efficiency. Gravimetric soil moisture content decreased significantly with the progress in days of experimentation irrespective of types of biochar used. However, increase in biochar doses increased the soil moisture content significantly over the one where no biochar was applied. Highest efficiency to conserve soil moisture over the days of study period was due to the application of bamboo leaves biochar.

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