Thomas Döring

Thomas Döring
  • PhD
  • Professor at University of Bonn

About

277
Publications
92,971
Reads
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5,272
Citations
Introduction
I studied Landscape Ecology at Münster University and received a PhD in organic agriculture from Kassel University. After postdocs in insect visual physiology and behaviour at Queen Mary University London and Imperial College London, I led the Crops Programme at the Organic Research Centre (UK). From 2013 to 2017 I was lecturer of agronomy at Humboldt University Berlin. I am now leading the Agroecology and Organic Farming group at University of Bonn.
Current institution
University of Bonn
Current position
  • Professor
Additional affiliations
October 2017 - present
University of Bonn
Position
  • Professor (Full)
April 2013 - May 2016
Humboldt-Universität zu Berlin
Position
  • Lecturer
December 2005 - March 2006
Queen Mary University of London
Position
  • PostDoc Position
Description
  • Electrophysiological experiments for determining spectral sensitivity of the Colorado Potato Beetle (Leptinotarsa decemlineata). Live beetles were imported from Germany to the UK with license obtained from the Plant Health Directorate of DEFRA.
Education
April 2000 - December 2004
University of Kassel
Field of study
  • Organic Agriculture
October 1996 - March 2000
University of Münster
Field of study
  • Landscape ecology

Publications

Publications (277)
Article
Full-text available
To promote and maintain health in agricultural and food systems, appropriate criteria are needed for the description and assessment of the health of soils, plants, animals, humans and ecosystems. Here we identify the concept of resilience as a universally applicable and fundamentally important criterion of health in all relevant areas of agricultur...
Article
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In the face of increasingly frequent droughts threatening crop performance, ecological theory suggests that higher species diversity may help buffering productivity by making systems more resistant through resource complementarity and more resilient through higher response diversity. However, empirical evidence for these diversity effects under dro...
Article
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Soil-borne plant diseases are a major source of crop losses. Biologically active soils have the ability to suppress pathogenic infections of plants, but little is known how this essential soil function might be affected by abiotic stresses. Using a model system with pea and its fungal pathogen Pythium ultimum we studied how the sup-pressiveness of...
Article
Full-text available
High stability of crop yields is a key objective in crop production and breeding, especially under the conditions of a changing climate. Reliable indices are therefore needed for quantifying yield stability. Recently it was shown that some frequently used indices of yield stability, such as the coefficient of variation (CV) may be wrongly interpret...
Article
Full-text available
Understanding how to optimize water and nutrient management is crucial for improving crop productivity in organic farming systems. In this study, we examined the effects of irrigation and fertilization on yield and nitrogen fixation in organically managed faba bean crops in temperate climates in six field trials covering three sites and two years....
Article
Full-text available
Yellow sticky traps are commonly used in horticultural production to monitor the insect pests Frankliniella occidentalis and Trialeurodes vaporariorum . As there are no binding specifications for their characteristics, we asked if different trap designs have comparable trapping properties. In greenhouse trials, we compared the trapping properties o...
Article
Accurately monitoring insect pest populations is essential for optimizing crop production in greenhouses. This study tested whether modification of yellow sticky traps with either (1) a black frame, (2) a fluorescent yellow frame, or the addition of either (3) a yellow or (4) a fluorescent yellow ground surface could increase catches of Trialeurode...
Article
Full-text available
Biodynamic farming is a growing branch of organic farming which uses various so-called bio-dynamic preparations with the aim to enhance plant growth and soil quality. These preparations comprise plant parts fermented in animal sheaths (e.g., cow intestines or deer bladders) which are then applied to manures and composts before applying to the field...
Poster
Full-text available
https://www.gfoe-conference.de/WEBS/GFOe2024.pages.download/Book_of_Abstracts.pdf
Article
Full-text available
There is growing interest in intercropping as a practice to increase productivity per unit area and ecosystem functioning in agricultural systems. Relay intercropping with soy and winter wheat may benefit soil health due to increased diversity and longer undisturbed soil cover, yet this remains largely unstudied. Using a field experiment in Eastern...
Article
Full-text available
While intensive control of weed populations plays a central role in current agriculture, numerous studies highlight the multifaceted contribution of weeds to the functionality and resilience of agroecosystems. Recent research indicates that increased evenness within weed communities may mitigate yield losses in contrast to communities characterized...
Article
Full-text available
Different diversification practices have the potential to reduce pests and therefore pesticide use. Yet, their integration at the agroecosystem level and the evaluation of their multifunctional effects remain limited. Through a two-year field experiment conducted in Germany, we tested whether associating intercropping (faba bean-wheat, followed by...
Conference Paper
Full-text available
Ground beetles are important bioindicators in agricultural landscapes. In the project Dü-NaMed, the effect of different organic fertilizers (cattle manure and slurry, straw, biogas digestate, compost) and a mineral fertilizer on soil arthropods including ground beetles was tested in field trials on two sites. Pitfall trap samples were taken over tw...
Article
Full-text available
Background Image-based crop growth modeling can substantially contribute to precision agriculture by revealing spatial crop development over time, which allows an early and location-specific estimation of relevant future plant traits, such as leaf area or biomass. A prerequisite for realistic and sharp crop image generation is the integration of mu...
Article
Full-text available
Background and aims Intercrops offer multiple advantages over sole crops. The aim of our study was to characterize root growth and interactions in spring wheat/faba bean intercrops to better understand belowground interactions that govern resource capture. Materials and methods A field experiment was conducted with one faba bean cultivar and two s...
Article
Agriculture faces several challenges including climate change and biodiversity loss while, at the same time, the demand for food, feed, biofuels, and fiber is increasing. Sustainable intensification aims to increase productivity and input-use efficiency while enhancing the resilience of agricultural systems to adverse environmental conditions throu...
Article
Full-text available
Cultivar mixtures have been proposed as a way to increase diversity and thereby improve plant production, but our understanding of the effects of mixing cultivars on crop diseases and resource-use efficiency remains fragmentary. We performed a meta-analysis to assess the effects of cultivar mixtures on crop yield, yield stability, resource-use effi...
Article
Full-text available
The application of lime and mineral fertiliser is known to mitigate soil acidification and improve soil quality in improved grasslands. However, the long-term effect of simultaneous lime and fertiliser amendments on soil carbon (C) and sulphur (S) cycling is still poorly understood. To examine if soil pH or nutrient availability are the dominant fa...
Conference Paper
Full-text available
Due to negative impacts of pesticides on ecosystems and human health, it is widely agreed that pesticide usage needs to be reduced. While various alternative ways to control and manage pests are already well known, these measures need to be further developed for higher effectiveness and reliability and for stronger adoption among farmers. Several e...
Article
Full-text available
While many pesticides are detrimental to human health and the environment, drastically reducing their use and risks in agriculture has been set as a key target for global environmental policies. To this end, redesigning agroecosystems by increasing plant diversity at the cropping system and landscape levels is increasingly seen as imperative. Posit...
Article
Full-text available
Purpose The current knowledge of belowground interactions in intercropping systems is limited due to methodological constraints. The current study aimed to investigate cereal-brassica and cereal-legume-brassica cover crop mixtures regarding mixture effects on root and shoot biomass as well as root traits, vertical root niche differentiation, and co...
Preprint
Full-text available
Background and Aims: Intercrops offer multiple advantages over sole crops. However, little is known about the mechanisms that govern the belowground interactions between mixed species. The aim of our study was to characterize root growth and interactions in spring wheat-faba bean intercrops for different sowing densities and spring wheat cultivars,...
Article
Full-text available
A winter wheat composite cross population (CCP), created in the UK in 2001, has been grown in Germany, Hungary, and the UK since 2005 (F5 generation). In 2008/09 (F8), a cycling pattern for the populations was developed between partners to test the effects of rapidly changing environments on agronomic performance and morphological characteristics....
Article
Full-text available
Aims Intercropping cereals and grain legumes has the potential to increase grain yield in comparison to the respective sole crops, but little is known about mixture effects at the early crop developmental stage. In cereal legume mixtures, the cereal is usually the dominating partner. We aimed to find out when domination starts, which factors may en...
Article
Full-text available
Behavioral manipulation (BM) is a multimodal control approach based on the interference with the stimuli mediating insect perception and interaction with the surroundings. BM could represent a win–win strategy for the management of vector-borne plant pathogens as the bacterium Xylella fastidiosa, since it could reduce the number of vectors alightin...
Article
Full-text available
Soil organic matter (SOM) is indispensable for soil health and, in the context of climate change, is considered a significant CO 2 sink. Improving agricultural management to increase long-term soil organic carbon (SOC) stocks for mitigating climate change requires tools that estimate short and long-cycling SOM pools. In this study, we analyzed chan...
Article
Full-text available
Inoculating crops with specifically designed microbial consortia (MC) is increasingly discussed as an instrument for sustainably promoting arable crop growth. While some promising results were achieved in laboratory, climate chamber, and greenhouse experiments, field applications of microbial inoculants under temperate climate conditions have been...
Article
Full-text available
Weed management in organic farming needs to integrate a wide range of preventive tools. Here we tested the stale seed bed technique in field experiments with organic lemon balm. In a two‐factorial trial, four intensities of stale seedbed after either autumn or spring ploughing were tested in 2019/2020 and 2020/2021 on alluvial loams of the research...
Preprint
Full-text available
Aims. Intercropping cereals and grain legumes has the potential to increase grain yield in comparison to the respective sole crops, but little is known about mixture effects at the early crop developmental stage. In cereal legume mixtures, the cereal is usually the dominating partner. We aimed to find out when domination starts, which factors may e...
Presentation
Full-text available
This presentation gives an overview of some basic aspects to consider in planning and implementing field trials in agronomy.
Article
Full-text available
Aphids are economically and ecologically important herbivorous insects. A critical step in their life cycle is the visually guided host finding behaviour. To elucidate the role of colour in host finding of aphid spring migrants we conducted large colour trap experiments in the field and analysed aphid catch data, using trap spectral reflectance dat...
Article
Full-text available
Ground beetles (carabids) constitute an important functional component of biodiversity in agroecosystems, mainly because of their role as predators of pests, but also as consumers of weed seeds and as prey to other organisms. Over the past few decades, there has been a marked and continuous decline of ground beetles in Europe, and many species of t...
Article
Full-text available
Purpose Mixtures of cover crops are gaining importance in farming systems. While complementarity between species is a potentially important mechanism underlying mixture benefits, there is little quantitative evidence about complementarity of root growth. Therefore, we aimed to gain detailed knowledge about mixture effects of specific root traits....
Article
Full-text available
The use of microbial consortia (MC) with complementing features is considered to be a promising method of sustainable crop intensification, potentially trumping the limited performance of single-strain applications. We assessed the effect of two novel MC on early wheat growth and litterbag microbial activity in heated and unheated soil. Pot experim...
Article
Full-text available
Cropping system diversification through annual intercropping provides a pathway for agricultural production with reduced inputs of fertilizer and pesticides. While several studies have shown that intercrop performance depends on the genotypes used, the available evidence has not been synthesized in an overarching analysis. Here, we review the effec...
Article
Compensation can be defined as a process by which a system is able to regain its normal state in response to losing a part of its structure. From genes to individuals to communities, compensatory processes ensure functionality, stability and resilience. While there is a rich literature on compensation in natural and semi-natural communities, as wel...
Article
Full-text available
Different methods have been proposed for in situ root-length density (RLD) measurement. One widely employed is the time-consuming sampling of soil cores or monoliths (MO). The profile wall (PW) method is a less precise, but faster and less laborious alternative. However, depth-differentiated functions to convert PW RLD estimates to MO RLD measureme...
Article
Full-text available
For several decades, farmers have been mixing rock powders with livestock slurry to reduce its NH3 emissions and increase its nutrient content. However, mixing rock powders with slurry is controversial, and there is currently no scientific evidence for its effects on NH3 and greenhouse gas (GHG) emissions or on changes in its nutrient content due t...
Presentation
Full-text available
Exploring potential to use new technologies in agriculture for diversification
Article
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Soil nutrient depletion threatens global food security and has been seriously underestimated for potassium (K) and several micronutrients. This is particularly the case for highly weathered soils in tropical countries, where classical soluble fertilizers are often not affordable or not accessible. One way to replenish macro- and micronutrients are...
Conference Paper
Full-text available
In the face of a changing climate, yield stability is becoming increasingly important for farmers and breeders. Long-term field experiments (LTEs) generate data sets that allow the quantification of stability for different agronomic treatments. However, there are no commonly accepted guidelines for assessing yield stability in LTEs. The large diver...
Presentation
Full-text available
Societies’ calls for addressing the urgent problems of climate change, biodiversity loss and other environmental crises are becoming ever louder. Responding to this, and to the growing severity of global threats to agricultural and food systems, national and international research funders are increasingly demanding that funded projects achieve real...
Article
Full-text available
While intercropping is known to have positive effects on crop productivity, it is unclear whether the effects of mixing species start at the early plant stage, that is, during germination. We tested whether the germination of two legume species, alsike clover and black medic, characterized by a contrasting response to water availability and tempera...
Article
Full-text available
Current use of mineral nitrogen (N) fertilizers is unsustainable because of its high fossil energy requirements and a considerable enrichment of the biosphere with reactive N. Biological nitrogen fixation (BNF) from leguminous crops is the most important renewable primary N source, especially in organic farming. However, it remains unclear to which...
Article
Full-text available
Poppy seed production is susceptible to abiotic and biotic stress and weed infestation, which introduces the risk of total crop failure. For the purpose of risk minimization, poppy was grown in additive intercropping systems with early and late sown white clover and spring barley sown at three different densities in a three year field trial to asse...
Article
Full-text available
In the face of a changing climate, yield stability is becoming increasingly important for farmers and breeders. Long-term field experiments (LTEs) generate data sets that allow the quantification of stability for different agronomic treatments. However, there are no commonly accepted guidelines for assessing yield stability in LTEs. The large diver...
Article
Full-text available
While intercropping is known to have positive effects on crop productivity, it is unclear whether the effects of mixing species start at the early plant stage, that is, during germination. We tested whether the germination of two legume species, alsike clover and black medic, characterized by a contrasting response to water availability and tempera...
Presentation
Full-text available
Ecological management of insect pests in agricultural crops through manipulation of host finding behaviour - Lecture at Federal University of Santa Catarina - Florianópolis-SC - Brazil
Article
Full-text available
Yield stability is important for food security and a sustainable crop production, especially under changing climatic conditions. It is well known that the variability of yields is linked to changes in meteorological conditions. However, little is known about the long-term effects of agronomic management strategies, such as the supply of important n...
Article
Full-text available
Many benefits of cover crops such as prevention of nitrate leaching, erosion reduction, soil organic carbon enhancement and improvement of soil structure are associated with roots. However, including root characteristics as a criterion for cover crop selection requires more knowledge on their root growth dynamics. Seven cover crop species (crimson...
Article
Full-text available
Many benefits of cover crops such as prevention of nitrate leaching, erosion reduction, soil organic carbon enhancement and improvement of soil structure are associated with roots. However, including root characteristics as a criterion for cover crop selection requires more knowledge on their root growth dynamics. Seven cover crop species (crimson...
Conference Paper
Full-text available
Diversifying rotations with grain legumes could contribute to the resilience of agricultural systems for adapting to climate change. Yield stability is an important goal in agricultural production and is particularly relevant in Europe-grown grain legumes. Their yields tend to be more variable than yields of some other crops and there is some evide...
Article
Full-text available
Organic amendments can reportedly sustain and increase lowland rice productivity in smallholder systems. Few studies have assessed locally-available substrates in hydrologically variable floodplain environments. We investigated the effects of green and farmyard manures on rice yields, and total soil C and N in the Kilombero floodplain, Tanzania. At...
Article
Full-text available
To meet the growing rice demand in Africa, gaps between actual and attainable yields have to be reduced. In Tanzania, this particularly concerns smallholder rain-fed production systems in the floodplains. After quantifying the existing yield gaps, key contributing factors need to be analyzed to improve site-specific management. Field experiments we...
Research
Full-text available
Elsalahy et al., 2020_Supplementary materials_Crop Resilience to Drought With and Without Response Diversity
Article
Full-text available
Most of our crops are grown in monoculture with single genotypes grown over wide acreage. An alternative approach, where segregating populations are used as crops, is an exciting possibility, but outcomes of natural selection upon this type of crop are not well understood. We tracked allelic frequency changes in evolving composite cross populations...
Article
Full-text available
Weed suppression is a potential benefit of cover crop mixtures, as species diversity may allow for combining early and late-season competition with weeds. Here, we studied if this is possible for only-legume mixtures containing species with different growth rates, by testing two legumes, alsike clover (AC; Trifolium hybridum L.) and black medic (BM...
Article
Full-text available
Weed suppression is a potential benefit of cover crop mixtures, as species diversity may allow for combining early and late-season competition with weeds. Here, we studied if this is possible for only-legume mixtures containing species with different growth rates, by testing two legumes, alsike clover (AC; Trifolium hybridum L.) and black medic (BM...
Article
Full-text available
In East Africa, smallholder farmers produce rainfed lowland rice mainly in floodplains. Low nitrogen contents of the predominant Fluvisols and highly variable hydrological conditions result in low yields and large yield variations, and hence, result in high production risks for farmers. We investigated crop management strategies aimed at increasing...
Conference Paper
Full-text available
Allelopathic root exudates affect natural and managed grasslands in various contexts such as weed control, reseeding, overseeding and crop rotation by causing autotoxicity and/or heterotoxicity. In this study, we investigated the allelopathic effect of two species of legumes, Alsike clover (Trifolium hybridum; AC) and Black medic (Medicago lupulina...
Presentation
Full-text available
Allelopathic root exudates affect natural and managed grasslands in various contexts such as weed control, reseeding, overseeding and crop rotation by causing autotoxicity and/or heterotoxicity. In this study, we investigated the allelopathic effect of two species of legumes, Alsike clover (Trifolium hybridum; AC) and Black medic (Medicago lupulina...
Preprint
Full-text available
Most of our crops are grown in monoculture with single genotypes grown over wide acreage. An alternative approach, where segregating populations are used as crops is an exciting possibility, but outcomes of natural selection upon this type of crop are not well understood. We tracked allelic frequency changes in evolving composite cross populations...
Article
Electromagnetic induction (EMI) data are often used to investigate spatial and temporal patterns of soil texture, soil water content, and soil salinity. We hypothesized that the EMI methodology might thus also offer potential to detect agricultural legacy effects originating from fertilizer application and irrigation of different fields. Therefore,...
Article
Full-text available
Organic farming is often subject of heated scientific and public debates. This raises the question: How can scientists working in organic farming research achieve being impartial while simultaneously sharing enthusiasm about organic farming and promoting it as a solution to many of the problems of agricultural and food systems? Science needs to be...
Conference Paper
Full-text available
In the face of a changing climate and the need to improve global food security, temporal yield stability is gaining increasing attention, and is often considered as important as mean yield itself. Analysis of yield stability is particularly relevant in European-grown grain legumes which produce high quality protein for food and feed and provide a r...
Chapter
Plant breeding and genetics play an important role in organic agriculture. Well‐rehearsed examples include plant breeding for resistance against plant diseases and pests, genetic improvement in terms of nutrient use efficiency and the selection for a better ability of crops to compete with weeds. However, beyond this view of plant genetics as a way...
Article
Full-text available
Grain legumes produce high quality protein for food and feed, and potentially contribute to sustainable cropping systems, but they are grown on only 1.5% of European arable land. Low temporal yield stability is one of the reasons held responsible for the low proportion of grain legumes, without sufficient quantitative evidence. The objective of thi...
Conference Paper
Full-text available
Flaxseed is the economically most important medicinal plant in Germany. It is cultivated on an area of over 2500 ha. Its pollen and/or nectar are a potential foodresource for insects in intensively used agricultural landscapes. To test this hypothesis insects on flowering flaxseed plants and the flowering environment were collected and the species...
Chapter
Organic potato cultivation requires a whole system perspective, with particular focus on rotation design. Producing organic potatoes relies strongly on indirect, preventive and long-term strategic measures for both plant nutrition and plant protection. This chapter examines all aspects of the process of cultivating organic potatoes, including rotat...
Data
Here we propose a method to adjust the standard CV to account for the systematic dependence of σ² from μ. This adjusted CV can be used as a stability index that is expressed in units that are equivalent to the standard CV, as a percentage of the mean, and can therefore be used in agronomic studies that aim to provide guidance for farmers and adviso...
Article
The size of the arable land is constantly decreasing all over the world due to severe anthropogenic disorders. Plant production therefore has to be adapted to changing environmental conditions along with the proper selection of crop varieties and the application of sustainable environmental technologies which also consider economic aspects. The inv...
Article
Full-text available
This year, organic farmers, advisors and researchers in the West of Germany celebrate the 25th anniversary of the foundation of an organic research and demonstration network. Established to support and improve organic farming systems, the network is funded by the federal state of North Rhine-Westphalia and is organized around 30 participating pilot...
Article
Full-text available
Grain legumes produce high quality protein for food and feed, and provide ecosystem services contributing to sustainable cropping systems. Yet yield instability is perceived to be high, resulting in low adoption by farmers in Europe, where grain legumes were cultivated on only 1.5% of the arable land in 2014. The objective of this study was to asse...
Poster
Full-text available
Abstract Numerous studies have demonstrated that crop mixtures may be higher yielding than monocultures; in addition, mixtures may also have the potential to increase weed suppression. Legumes are considered as a key component in many mixtures because of their essential role in fixing nitrogen1. Optimizing mixtures of only-legume for a particular...

Questions

Questions (10)
Question
The wood of the endangered tree species Paubrasilia echinata (previously Caesalpinia echinata), has traditionally been used for making string instrument bows. Currently, there is a discussion about how best to conserve this species. In particular, there is an initiative to upgrade its international conservation status on CITES, which would lead restriction of Brazilwood trading . Bow makers and related industries are presently lobbying against the CITES upgrade. I find it difficult to obtain unbiased, objective information on how to best address this problem from a conservation perspective. Can anyone please comment? Many thanks,
Thomas
Question
In the past, agricultural field stations (AFS) have provided important insights into cropping systems, and research conducted there has greatly helped to optimize these systems. However, with increasingly variable weather, as already experienced in many locations in a changing climate, reliability of results obtained in field experiments may decline. The question is therefore how transferable the findings from AFS may be in the future, as extreme weather events increase, and "exceptional years" may become the rule. Further, in response to this situation, how can AFS, and the design of field experiments answer to these challenges? Thanks for your views - Thomas
Question
Although it is established that in many cases organic farming has benefits for farmland biodiversity, there is still room for improvement. So what are the biggest challenges to get nature conservation more integrated into organic farming?
Question
We set up a pot experiment using soil from the field (location: experimental station, Berlin-Dahlem, Germany) to test the growth of Alsike clover (Trifolium hybridum) and Black medic (Medicago lupulina). After plant emergence the pictured larva was found in a few pots where it devoured most of the young plants. Does anyone know this species? The larva appeared to have hidden in the soil. Many thanks, Thomas
Question
Recently we found the weed species Filago arvensis on a fallowed sandy field in Thyrow, East Germany; the field is part of a long-term trial on cropping systems, with the fallow being one of the three courses of the old "unimproved" three course rotation. No mineral fertilizer has been given to these plots for more than a decade. Because Filago arvensis is Red-Listed in Germany I would like to know more about its current distribution and population trend. Also it would be great to link up with other people working on this species.
Question
Attached is a pdf with three pictures of young lupin plants in the greenhouse. There are no spots or any discolorations on the leaves, but all leaves show peculiar curling downwards. This is not dependent on the level of water in the pots. Do you have any idea what this could be?
Question
Like in many other areas of science, the number of papers in biological research has increased dramatically over the last few years (e.g. Pautasso 2012, http://www.mdpi.com/2071-1050/4/12/3234/htm). So as there is so much more to read, how should we manage our time?
a) Do you adjust the number of papers you read, decreasing the proportion of time spent on other things (writing, teaching)?
b) Do you adjust the time spent per paper, decreasing the thoroughness of reading?
c) Do you specialise more, covering a smaller area of research?
Or are there any other solutions to this conundrum? Thanks for sharing your views.
Question
Scientific specialisation is costly in terms of time investment, but it is also risky. So what is the best strategy for a specialist who has picked an unpopular topic: Hope for a (re-)discovery by your peers of your subject? Or change course and move on to something that everyone is doing?
Question
In the competition for grants, jobs and other resources, what is the best strategy for researchers with wider interests (i.e. the generalists) to be able to compete with the 'experts' (i.e. the specialists)? Carry on, or pick a topic and start specialising?
Question
Soil organic carbon (SOC) is an essential component of soil fertility, but to maintain SOC levels, the soil depends on crop residue input. On the other hand, biofuel production, e.g. CH4 from maize, depends on harvesting basically the same carbon from the field and feeding it to an anaerobic digester. How can these two demands be reconciled in view of long-term maintenance of soil fertility?

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