Back to Search
Start Over
Characterizing mass–volume–density–porosity relationships in a sandy loam soil amended with compost
- Source :
- Canadian Journal of Soil Science. 100:289-301
- Publication Year :
- 2020
- Publisher :
- Canadian Science Publishing, 2020.
-
Abstract
- Although compost is widely used as an organic soil amendment or conditioner, little is known of how it affects the characteristics or interactions among soil constituents. To address this, mixture theory was used to describe the mass–volume–density–porosity attributes and interactions among bulk soil, the mineral constituent, and the organic matter constituent of a sandy loam soil in a no-till corn field that had received one-time additions of yard waste compost at rates of 0 (control), 64, 154, and 380 dry t ha−1. Bulk density (BD, 0–10 cm depth) decreased consistently and near-linearly with increasing soil organic matter (SOM) mass fraction (FOM) for all six growing seasons (2012–2017) after compost addition. Fitting mixture theory expressions to BD vs. FOMdata and to soil particle density vs. FOMdata for 2013–2017 yielded constant mineral and SOM self-packing densities of DM = 1.673 Mg m−3and DO = 0.335 Mg m−3, respectively, and constant mineral and SOM particle densities of ρM = 2.760 Mg m−3and ρO = 1.409 Mg m−3, respectively. On a self-packing basis, soil mineral and SOM domain porosities were constants at nM = 0.39 and nO = 0.76, respectively. On a bulk soil volume basis, soil mineral and SOM porosities and volume ratios were linear functions of FOM. The porosity and volume characteristics of the SOM domain differed substantially from those of bulk soil and the mineral domain, and may therefore control the agri-environmental performance of soil, given that organic matter influences soil functioning more than mineral matter.
- Subjects :
- Compost
Soil organic matter
Amendment
Soil Science
04 agricultural and veterinary sciences
010501 environmental sciences
engineering.material
01 natural sciences
Volume density
Agronomy
Loam
040103 agronomy & agriculture
engineering
0401 agriculture, forestry, and fisheries
Environmental science
Porosity
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 19181841 and 00084271
- Volume :
- 100
- Database :
- OpenAIRE
- Journal :
- Canadian Journal of Soil Science
- Accession number :
- edsair.doi...........4b7baeb8f0a515f59eaed959c5d0cf00