Use of organic manures for amendment of compacted clay soils II. Effect of carbon to nitrogen ratio

1989 ◽  
Vol 20 (15-16) ◽  
pp. 1635-1644 ◽  
Author(s):  
Yoram Avnimelech ◽  
Avraham Cohen
Keyword(s):  
Clay Soils ◽  
Compacted Clay ◽  
Organic Manures ◽  
Carbon To Nitrogen Ratio ◽  
Nitrogen Ratio

scholarly journals Hydraulic and Swell–Shrink Characteristics of Clay and Recycled Zeolite Mixtures for Liner Construction in Sustainable Waste Landfill

2021 ◽  
Vol 13 (13) ◽  
pp. 7301
Author(s):  
Marcin K. Widomski ◽  
Anna Musz-Pomorska ◽  
Wojciech Franus
Keyword(s):  
Hydraulic Conductivity ◽  
Exchange Capacity ◽  
Saturated Hydraulic Conductivity ◽  
Clay Soils ◽  
Compacted Clay ◽  
Clay Liner ◽  
Compacted Clay Liner ◽  
Drying And Rewetting ◽  
Swelling Characteristics ◽  
Shrinkage And Swelling

This paper presents research considering hydraulic as well as swelling and shrinkage characteristics of potential recycled fine particle materials for compacted clay liner for sustainable landfills. Five locally available clay soils mixed with 10% (by mass) of NaP1 recycled zeolite were tested. The performed analysis was based on determined plasticity, cation exchange capacity, coefficient of saturated hydraulic conductivity after compaction, several shrinkage and swelling characteristics as well as, finally, saturated hydraulic conductivity after three cycles of drying and rewetting of tested specimens and the reference samples. The obtained results showed that addition of zeolite to clay soils allowed reduction in their saturated hydraulic conductivity to meet the required threshold (≤1 × 10−9 m/s) of sealing capabilities for compacted clay liner. On the other hand, an increase in plasticity, swelling, and in several cases in shrinkage, of the clay–zeolite mixture was observed. Finally, none of the tested mixtures was able to sustain its sealing capabilities after three cycles of drying and rewetting. Thus, the studied clayey soils mixed with sustainable recycled zeolite were assessed as promising materials for compacted liner construction. However, the liner should be operated carefully to avoid extensive dissication and cracking.

scholarly journals Association of ectomycorrhizal trees with high carbon-to-nitrogen ratio soils across temperate forests is driven by smaller nitrogen not larger carbon stocks

2018 ◽  
Vol 106 (2) ◽  
pp. 524-535 ◽  
Author(s):  
Kai Zhu ◽  
M. Luke McCormack ◽  
Richard A. Lankau ◽  
J. Franklin Egan ◽  
Nina Wurzburger
Keyword(s):  
Temperate Forests ◽  
Carbon Stocks ◽  
High Carbon ◽  
Carbon To Nitrogen Ratio ◽  
Nitrogen Ratio

scholarly journals Factors controlling nitrous oxide emissions from managed northern peat soils with low carbon to nitrogen ratio

2018 ◽  
Vol 122 ◽  
pp. 186-195 ◽  
Author(s):  
Maarit Liimatainen ◽  
Carolina Voigt ◽  
Pertti J. Martikainen ◽  
Jyrki Hytönen ◽  
Kristiina Regina ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrous Oxide Emissions ◽  
Low Carbon ◽  
Peat Soils ◽  
Carbon To Nitrogen Ratio ◽  
Nitrogen Ratio
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