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"Agricultural conservation"
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Conservation Agriculture as a Sustainable System for Soil Health: A Review
Soil health is a term used to describe the general state or quality of soil, and in an agroecosystem, soil health can be defined as the ability of the soil to respond to agricultural practices in a way that sustainably supports both agricultural production and the provision of other ecosystem services. Conventional agricultural practices cause deterioration in soil quality, increasing its compaction, water erosion, and salinization and decreasing soil organic matter, nutrient content, and soil biodiversity, which negatively influences the productivity and long-term sustainability of the soil. Currently, there are many evidences throughout the world that demonstrate the capability of conservation agriculture (CA) as a sustainable system to overcome these adverse effects on soil health, to avoid soil degradation and to ensure food security. CA has multiple beneficial effects on the physical, chemical, and biological properties of soil. In addition, CA can reduce the negative impacts of conventional agricultural practices on soil health while conserving the production and provision of soil ecosystem services. Today, agricultural development is facing unprecedented challenges, and CA plays a significant role in the sustainability of intensive agriculture. This review will discuss the impact of conservation agricultural practices on soil health and their role in agricultural sustainability.
Journal Article
Impact, adaptation, and mitigation of climate change in Indian agriculture
Climate change poses serious risks to Indian agriculture as half of the agricultural land of the country is rainfed. Climate change affects crop yield, soil processes, water availability, and pest dynamics. Several adaptation strategies such as heat- and water stress-tolerant crop varieties, stress-tolerant new crops, improved agronomic management practices, improved water use efficiency, conservation agriculture practices and improved pest management, improved weather forecasts, and other climate services are in place to minimize the climatic risks. The agriculture sector contributes 14% of the greenhouse gas (GHG) from the country. Mitigation of GHG emission from agriculture can be achieved by changing land-use management practices and enhancing input-use efficiency. Experiments in India showed that methane emission from lowland rice fields can be reduced by 40–50% with alternate wetting and drying (AWD), growing shorter duration varieties, and using neem-coated urea according to soil health card (SHC) and leaf color chart (LCC). Dry direct-seeding of rice, which does not require continuous soil submergence, can reduce methane emission by 70–75%. Sequestration of carbon (C) in agricultural soil can be promoted with the application of organic manure, crop residues, and balanced nutrients. India has taken several proactive steps for addressing the issues of climate change in agriculture. Recently, it has also committed for reducing GHG emission intensity by 45% by 2030 and achieving net zero emission by 2070. The paper discusses the major impacts of climate change, potential adaptation, and mitigation options and the initiatives of Govt. of India in making Indian agriculture climate-smart.
Journal Article
Conservation Agriculture and Soil Organic Carbon: Principles, Processes, Practices and Policy Options
Intensive agriculture causes land degradation and other environmental problems, such as pollution, soil erosion, fertility loss, biodiversity decline, and greenhouse gas (GHG) emissions, which exacerbate climate change. Sustainable agricultural practices, such as reduced tillage, growing cover crops, and implementing crop residue retention measures, have been proposed as cost-effective solutions that can address land degradation, food security, and climate change mitigation and adaptation by enhancing soil organic carbon (SOC) sequestration in soils and its associated co-benefits. In this regard, extensive research has demonstrated that conservation agriculture (CA) improves soil physical, chemical, and biological properties that are crucial for maintaining soil health and increasing agroecosystem resilience to global change. However, despite the research that has been undertaken to implement the three principles of CA (minimum mechanical soil disturbance, permanent soil organic cover with crop residues and/or cover crops, and crop diversification) worldwide, there are still many technical and socio-economic barriers that restrict their adoption. In this review, we gather current knowledge on the potential agronomic, environmental, and socio-economic benefits and drawbacks of implementing CA principles and present the current agro-environmental policy frameworks. Research needs are identified, and more stringent policy measures are urgently encouraged to achieve climate change mitigation targets.
Journal Article
Farmland preservation : land for future generations
\"As land is lost to urban sprawl and other non-farm activity, our ability to produce food is diminished and options for future food production are limited. Farmland preservation speaks to the need to preserve the agricultural land base for future generations. The need for protection is driven by uncertainty caused by climate change, population growth, food security, energy availability, and other local and global factors. This uncertainty means that there is an ever-growing responsibility to ensure that the actions of today do not compromise the needs of future generations. This second edition of \"Farmland Preservation\" provides a range of views and case studies from across Canada, the United States, and beyond. Its fourteen essays are intended to help the reader understand the importance of the issue and the potential for applying new approaches to agricultural protection, policy tools, and initiatives.\"-- Provided by publisher.
Book
Conservation tillage and organic farming reduce soil erosion
AbstractThe impact of different arable farming practices on soil erosion is only partly resolved, and the effect of conservation tillage practices in organic agriculture on sediment loss has rarely been tested in the field. This study investigated rainfall-induced interrill sediment loss in a long-term replicated arable farming system and tillage experiment (the FAST trial) with four different cropping systems: (1) organic farming with intensive tillage, (2) organic farming with reduced tillage, (3) conventional farming with intensive tillage, and (4) conventional farming with no tillage. Measurements were carried out under simulated heavy rainfall events with runoff plots in 2014 (fallow land after winter wheat) and 2017 (during maize growth). Organic farming decreased mean sediment delivery compared to conventional farming by 30% (0.54 t ha−1 h−1). This study demonstrated that reduced tillage in organic farming decreased sediment delivery (0.73 t ha−1 h−1) compared to intensively tilled organic plots (1.87 t ha−1 h−1) by 61%. Nevertheless, the combination of conventional farming and no tillage showed the lowest sediment delivery (0.24 t ha−1 h−1), whereas intensively tilled conventional plots revealed the highest delivery (3.46 t ha−1 h−1). Erosion rates were much higher in June during maize growth (2.92 t ha−1 h−1) compared to those of fallow land after winter wheat (0.23 t ha−1 h−1). Soil surface cover and soil organic matter were the best predictors for reduced sediment delivery, and living plant cover from weeds in reduced organic treatments appeared to protect soil surfaces better than plant residues in conventional, no-tillage plots. Soil erosion rates were significantly lower when soil cover was above 30%. In conclusion, this study demonstrates that both organic farming and conservation agriculture reduce soil losses and showed for the first time that reduced tillage practices are a major improvement in organic farming when it comes to soil erosion control.
Journal Article
A genealogy of sustainable agriculture narratives: implications for the transformative potential of regenerative agriculture
The agri-food system is facing a range of social-ecological threats, many of which are caused and amplified by industrial agriculture. In response, numerous sustainable agriculture narratives have emerged, proposing solutions to the challenges facing the agri-food system. One such narrative that has recently risen to prominence is regenerative agriculture. However, the drivers for the rapid emergence of regenerative agriculture are not well understood. Furthermore, its transformative potential for supporting a more sustainable agri-food system is underexplored. Through a genealogical analysis of four prominent sustainable agriculture narratives; organic agriculture, conservation agriculture, sustainable intensification, and agroecology; we consider how regenerative agriculture’s growing momentum can be contextualised within existing narratives and explore the implications this might have for its transformative potential. This analysis reveals that the genealogies of these sustainable agriculture narratives have led to a number of contestations and complementarities which have coalesced to drive the emergence of regenerative agriculture. We also find that, in contrast to agroecology, regenerative agriculture shares with other Global North narratives a limited scope for offering transformative pathways for agricultural production. This is largely due to their inadequate consideration of power and equity issues in the agri-food system. We argue that regenerative agriculture therefore risks inhibiting deeper agri-food system transformations that address both social and ecological challenges and is not the unifying sustainable agriculture narrative it claims to be. Nonetheless, regenerative agriculture could contribute towards a broader plurality of sustainable agriculture narratives that collectively might enable a transformation to a more sustainable, diverse, and just agri-food system.
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