Long-term release of carbon from grassland soil amended with different slurry particle size fractions: a laboratory incubation study

2011 ◽  
Vol 25 (11) ◽  
pp. 1514-1520 ◽  
Author(s):  
João Grilo ◽  
Roland Bol ◽  
Elizabeth R. Dixon ◽  
David Chadwick ◽  
David Fangueiro
Keyword(s):  
Particle Size ◽  
Grassland Soil ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Laboratory Incubation ◽  
Incubation Study

scholarly journals Redistribution of particle-size fractions in ordinary chernozem affected by long-term irrigation and chemical melioration with phosphogypsum

2020 ◽  
pp. 95-101
Author(s):  
T. K. Makarova ◽  
N. N. Maksуmova ◽  
G. V. Нapich ◽  
I. V. Chushkina
Keyword(s):  
Particle Size ◽  
Size Composition ◽  
Ordinary Chernozem ◽  
Physical Clay ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Particle Size Composition ◽  
Leached Chernozem ◽  
Application Rates

The article reveals the issue of redistribution of particle-size fractions in ordinary low-humus leached chernozem on loamy loess in the condition of Northern Steppe of Ukraine affected by the irrigation with II class water and chemical melioration with phosphogypsum. Rather long use of water for irrigation from the reservoir on the Samara River in the Dniprovskyi district of the Dnipropetrovsk region deteriorated the soil properties due to salinization development in it, which led to the use of phosphogypsum. The calculated application rates of phosphogypsum 1,4 t/ha, 3 t/ha and 6 t/ha were applied along with irrigation and without it. The effect of chemical melioration and irrigation on the ecological and ameliorative condition of soil that resulted in the change of its particle-size composition, bulk density and structure was studied. It is established that irrigation of the soil with an average irrigation rate of 1500 m3/ha reduces the content of physical clay by 0,12-0,06% compared to the options without irrigation. When applying phosphogypsum along with irrigation there are minor changes in the redistribution of particle-size fractions: an increase in the fractions of physical sand and a decrease in the fractions of physical clay. It was determined that the particle-size composition of soil is more resistant to the effect of phosphogypsum rather than to the effect of irrigation. In non-irrigated variants when applying chemical melioration with phosphogypsum, the content of physical sand increases by 0,54-0,91% compared to the reference variant and the content of physical clay decreases by 0,87-1,13%. With increasing the rate of phosphogypsum, the content of physical sand also increases. The effect of improving the structure and loosening of the soil is observed in the variants where phosphogypsum at the rate of 6 t/ha was applied under the main tillage and at the rate of 3 t/ha under spring cultivation.

scholarly journals 14C-labeled organic amendments: Characterization in different particle size fractions and humic acids in a long-term field experiment

Geoderma ◽  
2012 ◽  
Vol 177-178 ◽  
pp. 39-48 ◽  
Author(s):  
Michael Tatzber ◽  
Michael Stemmer ◽  
Heide Spiegel ◽  
Christian Katzlberger ◽  
Claudia Landstetter ◽  
...  
Keyword(s):  
Particle Size ◽  
Field Experiment ◽  
Humic Acids ◽  
Organic Amendments ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
Term Field
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