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Response of Soil Aggregate Stability to Manure Amendments in the Ultuna Long‐Term Soil Organic Matter Experiment
Author(s) -
Gerzabek Martin H.,
Kirchmann Holger,
Pichlmayer Friedrich
Publication year - 1995
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19951580308
Subject(s) - humus , peat , manure , organic matter , soil organic matter , agronomy , environmental science , biomass (ecology) , aggregate (composite) , long term experiment , soil structure , chemistry , soil science , soil water , ecology , biology , organic chemistry , materials science , composite material
The present paper deals with the long‐term effects of bare fallow and organic treatments on soil aggregate stability. Soil samples were collected from plots of the long‐term soil organic matter experiment in Ultuna/Sweden, which is already running for 38 years. Soil aggregate stability (SAS) showed a clear response to soil management. SAS increased in following order: bare fallow < no‐N < green manure < peat ≤ farmyard manure. Humus contents of the plots had a significant impact on SAS. Increasing C org − contents generally enhanced aggregation. However, the unfavourably high C/Nratio of peat treatments and the resulting small size of microbial biomass led to a distinctly lower positive influence of accumulated soil organic matter in case of peat additions.