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Conservation agriculture and smallholder farming in Africa: The heretics' view
Conservation agriculture is claimed to be a panacea for the problems of poor agricultural productivity and soil degradation in sub-Saharan Africa (SSA). It is actively promoted by internationalExpand
Nitrogen Fixation in Tropical Cropping Systems
Tropical environments - climates, soils and cropping systems nitrogen fixing organisms in the tropics nitrogen fixation process and its role in the tropics tropical crops and cropping systems -Expand
Toxicity of heavy metals to microorganisms and microbial processes in agricultural soils: a review
Abstract An increasing body of evidence suggests that microorganisms are far more sensitive to heavy metal stress than soil animals or plants growing on the same soils. Not surprisingly, most studiesExpand
Organic inputs for soil fertility management in tropical agroecosystems: Application of an organic resource database
Organic resources play a critical role in both short-term nutrient availability and longer-term maintenance of soil organic matter in most smaller holder farming systems in the tropics. Despite thisExpand
When yield gaps are poverty traps: The paradigm of ecological intensification in African smallholder agriculture
Yield gaps are pervasive in African smallholder agriculture, and are large for almost all crops in all regions. There is consensus that poor soil fertility and nutrient availability are the majorExpand
The effect of long-term irrigation using wastewater on heavy metal contents of soils under vegetables in Harare, Zimbabwe
Abstract The magnitude of contamination, regulatory compliance and annual loadings of soils with copper (Cu), zinc (Zn), cadmium (Cd), nickel (Ni), chromium (Cr) and lead (Pb) were determined atExpand
Driven by Nature: Plant Litter Quality and Decomposition
Pathways and processes in decomposition foraging, feeding and feedback manipulation of plant litter quality synchrony and soil organic matter - theory into practice? building soil organic matterExpand
Atmospheric Nitrogen Deposition in World Biodiversity Hotspots: the Need for a Greater Global Perspective in Assessing N Deposition Impacts
Increased atmospheric nitrogen (N) deposition is known to reduce plant diversity in natural and semi-natural ecosystems, yet our understanding of these impacts comes almost entirely from studies inExpand
Residual soil phosphorus as the missing piece in the global phosphorus crisis puzzle
A two-pool soil P model is applied to reproduce historical continental crop P uptake as a function of P inputs from fertilizer and manure and to estimate P requirements for crop production in 2050, which is up to 50% less than other estimates in the literature that ignore the role of residual soil P. Expand