Murukestävyys maan kasvukunnon mittarina

Translated title of the contribution: Aggregate stability as an indicator of soil health

Jaana Ravander, Tuomas J Mattila, Jukka Rajala

Research output: Book/ReportCommissioned report

Abstract

Aggregates or crumbs are the basic building blocks of soil structure. Their stability against dispersion from water is a key indicator for healthy soil. If the crumbs are stable, the soil structure is stable and porosity can be maintained.

Soil aggregate stability is measured by submerging aggregates to water and observing the fraction of particles that maintain their stability. In addition as aggregate stability depends on the same factors as overall soil health, it can be used as a monitoring indicator. It will provide a measurement of the total effect of liming, fertilization, tillage, crop roots, addition of organic matter, microbial effect and soil water balance on the soil system. Changes in aggregate stability can then be used to monitor the effect of changes in farming practices.

This report looks at soil aggregate stability through a literature review and through experimental measurements. The review focuses on the factors that contribute to aggregate stability and the effect of aggregate stability to soil functioning. In addition monitoring results from 24 test fields over three years are used to compare different ways of measuring aggregate stability and to link aggregate stability with other components of soil health.
Translated title of the contributionAggregate stability as an indicator of soil health
Original languageFinnish
PublisherHelsingin yliopisto Ruralia-instituutti
Number of pages43
ISBN (Electronic)978-951-51-3771-5
Publication statusPublished - 2019
MoE publication typeD4 Published development or research report or study

Publication series

NameRaportteja / Helsingin yliopisto Ruralia-instituutti
PublisherHelsingin yliopisto Ruralia-instituutti
No.191
ISSN (Electronic)1796-0630

Fields of Science

  • 415 Other agricultural sciences

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