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Virtual Special Issue on Biochar

Compiled by: Richard Burns, The University of Queensland, Australia and Karl Ritz, Cranfield University, UK

 

Over the past few years, the impact of adding pyrolysed organic carbon (or biochar as we usually call it) to agricultural soils has received much attention from biologists because of the possible benefits arising to soil quality and crop yields. A further impetus has been the potential to gain carbon credits by carbon sequestration. There are many different forms of biochar, determined according to such factors as nature of source material and pyrolysis temperature. Some studies have shown that biochars can apparently improve a number of soil chemical and physical properties, including exchange capacity and nutrient retention, as well as structure, water relations and nutrient availability. Others have concentrated on the impacts of biochar on soil organisms and the attendant processes that they regulate.

 

The 29 papers presented in this Virtual Special Issue are a selection of those exploring this biochar theme and which have been published in Soil Biology & Biochemistry since 2009. They illustrate the diversity of such research as well as some of the warmly debated, but as yet equivocal, benefits. The subjects of these communications range from: impacts on community composition and C dynamics including the priming effect, nitrogen cycling processes, enzyme activities and the C cycle, to the impacts of biochar on earthworms and their activities, and, of course, effects on plant growth and yield.

 

We hope that collating these publications under one virtual roof will stimulate informed debate and accelerate the arrival at a consensus regarding whether biochar is an important addition to our much-needed agricultural armoury or a passing trend with no lasting value or consequences for environmental management.

 

Papers included in this virtual special issue:

 

Papers included in this virtual special issue:

 

 

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