Organic Matter and Soil Productivity
نویسندگان
چکیده
منابع مشابه
Soil Organic Matter and Soil Productivity: Searching for the Missing Link
Soil-organic matter (SOM) is a complex array of components including soil fauna and flora at different stages of decomposition (Berg et al . , 1982). I ts concentration in soils can vary from 0.5% in mineral soils to almost 100% in peat soils (Brady, 1974). Organic matter (OM) in the surface mineral soil is considered a major determinant of forest ecosystem productivity because it affects water...
متن کاملAspen and white spruce responses to organic matter removal and soil compaction in the BWBS Long-Term Soil Productivity Study
Organic matter removal and soil compaction are two types of soil disturbance that occur during forest harvesting activities. Both of these types of disturbance have the potential to reduce the long-term productivity of all vegetation which grows on the site. Quantifying the effects of different levels or organic matter removal and soil compaction is one of the objectives of the LongTerm Soil Pr...
متن کاملSustainable Agriculture, Soil Health, and Soil Organic Matter
The latter two principles protect the soil resource on which all food and fibre production ultimately depends. However, agricultural production systems differ from ‘natural’ or undeveloped systems in that they can be considered to be ‘leaky’ with respect to nutrients. This is inevitable, due to nutrient removal in harvested product, but inappropriate fertiliser management can exacerbate the ‘le...
متن کاملSoil Organic Matter: Its Fractionation and Role in Soil Structure
An understanding of the form and function of SOM in soil is essential to sustainable crop production. Various methods of SOM fractionation are used to study SOM forms and to gain an understanding of interaction between SOM and aggregate formation. Physical SOM fractionation techniques are based on the concept that SOM associated with particles of various sizes. differs in structure and function...
متن کاملTranslocation of soil organic matter following reservoir impoundment in boreal systems: Implications for in situ productivity
To evaluate the effect of reservoir flooding on carbon cycling over time, we studied sedimentary environments in three natural lakes that existed prior to impoundment and that have been incorporated in the larger lentic system of a 70-yr-old boreal reservoir in Quebec. Elemental and biomarker analyses were determined in all core intervals and three soil profiles to characterize source inputs of...
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ژورنال
عنوان ژورنال: Nature
سال: 1963
ISSN: 0028-0836,1476-4687
DOI: 10.1038/200222a0