scholarly journals The Environmental Impacts of Achieving Global Food Security: From Agricultural Intensification to Large-Scale Land Acquisitions

2016 ◽  
Author(s):  
Kyle Davis
Keyword(s):  
Food Security ◽  
Environmental Impacts ◽  
Agricultural Intensification ◽  
Large Scale ◽  
Global Food Security ◽  
Land Acquisitions ◽  
Large Scale Land ◽  
Global Food

scholarly journals Agricultural intensification, dietary diversity, and markets in the global food security narrative

2019 ◽  
Vol 20 ◽  
pp. 9-16 ◽  
Author(s):  
A. Ickowitz ◽  
B. Powell ◽  
D. Rowland ◽  
A. Jones ◽  
T. Sunderland
Keyword(s):  
Food Security ◽  
Agricultural Intensification ◽  
Dietary Diversity ◽  
Global Food Security ◽  
Global Food

scholarly journals Global food insecurity. Treatment of major food crops with elevated carbon dioxide or ozone under large-scale fully open-air conditions suggests recent models may have overestimated future yields

2005 ◽  
Vol 360 (1463) ◽  
pp. 2011-2020 ◽  
Author(s):  
Stephen P Long ◽  
Elizabeth A Ainsworth ◽  
Andrew D.B Leakey ◽  
Patrick B Morgan
Keyword(s):  
Carbon Dioxide ◽  
Food Security ◽  
Large Scale ◽  
Extensive Study ◽  
Interactive Effects ◽  
Yield Losses ◽  
Air Concentration ◽  
Global Food Security ◽  
Large Yield ◽  
Global Food

Predictions of yield for the globe's major grain and legume arable crops suggest that, with a moderate temperature increase, production may increase in the temperate zone, but decline in the tropics. In total, global food supply may show little change. This security comes from inclusion of the direct effect of rising carbon dioxide (CO 2 ) concentration, [CO 2 ], which significantly stimulates yield by decreasing photorespiration in C 3 crops and transpiration in all crops. Evidence for a large response to [CO 2 ] is largely based on studies made within chambers at small scales, which would be considered unacceptable for standard agronomic trials of new cultivars or agrochemicals. Yet, predictions of the globe's future food security are based on such inadequate information. Free-Air Concentration Enrichment (FACE) technology now allows investigation of the effects of rising [CO 2 ] and ozone on field crops under fully open-air conditions at an agronomic scale. Experiments with rice, wheat, maize and soybean show smaller increases in yield than anticipated from studies in chambers. Experiments with increased ozone show large yield losses (20%), which are not accounted for in projections of global food security. These findings suggest that current projections of global food security are overoptimistic. The fertilization effect of CO 2 is less than that used in many models, while rising ozone will cause large yield losses in the Northern Hemisphere. Unfortunately, FACE studies have been limited in geographical extent and interactive effects of CO 2 , ozone and temperature have yet to be studied. Without more extensive study of the effects of these changes at an agronomic scale in the open air, our ever-more sophisticated models will continue to have feet of clay.

Large-Scale Land Acquisitions, Livelihoods, and Gender Configurations in Zimbabwe

2015 ◽  
pp. 130-144 ◽  
Author(s):  
Patience Mutopo ◽  
Manase Kudzai Chiweshe ◽  
Chipo Plaxedes Mubaya
Keyword(s):  
Food Security ◽  
Case Studies ◽  
Rural Women ◽  
Large Scale ◽  
Rural Livelihoods ◽  
Land Loss ◽  
Land Acquisitions ◽  
New Challenges ◽  
Large Scale Land ◽  
And Gender

The notion of large-scale land acquisitions has been topical in recent years in Zimbabwe; it has even created more nuanced debates, since 70% of rural women in Zimbabwe are the majority of food producers. Foreign and locally orchestrated land deals have presented new challenges and threats to the livelihoods of women in rural Zimbabwe, at a time of land redistributive programs that have been viewed nationally and internationally as chaotic, affecting the food security, economic prowess, and international relations of Zimbabwe. The main aim of this chapter is to examine how women are particularly affected by the investments, based on three case studies. An analysis of the Zimbabwean scenario is presented with regards to participatory methodologies that reflect women's rural livelihoods and land loss.

Toward large-scale crop production forecasts for global food security

2016 ◽  
Vol 60 (5/6) ◽  
pp. 5:1-5:11 ◽  
Author(s):  
G. Badr ◽  
L. J. Klein ◽  
M. Freitag ◽  
C. M. Albrecht ◽  
F. J. Marianno ◽  
...  
Keyword(s):  
Food Security ◽  
Crop Production ◽  
Large Scale ◽  
Global Food Security ◽  
Global Food

Disentangling the environmental impacts in increasing global food production

2021 ◽  
Author(s):  
Maria Cristina Rulli ◽  
Paolo D'Odorico
Keyword(s):  
Environmental Impacts ◽  
Crop Production ◽  
Agricultural Intensification ◽  
Large Scale ◽  
Crop Yields ◽  
Rural Livelihoods ◽  
Food Prices ◽  
Habitat Destruction ◽  
Agricultural System ◽  
Global Food

<p>The past few decades have seen unprecedented changes in the global agricultural system with a dramatic increase in the rates of crops production fueled by an escalating demand for food calories, as a result of demographic growth, dietary changes, and – more recently – new bioenergy policies. Food prices have become consistently higher and increasingly volatile with dramatic spikes in 2007-08 and 2010-11. The confluence of these factors has heightened demand for the natural resources needed for crop production, that is land and water so increasing the environmental burden. Solutions to feed the planet often point to agricultural intensification (i.e., increase in crop yields) as the approach that could meet the increasing human demand with the smaller environmental impacts. Indeed, intensification avoids the land use change (e.g., deforestation), habitat destruction, and increase in CO<sub>2</sub> emissions that would result from an expansion of cultivated land (or “extensification”). The impacts of intensification on freshwater resources, rural livelihoods, and equity, however, is often ignored. At the same time, agricultural expansion has important externalities that go beyond biodiversity losses or greenhouse gas emissions, with important ramifications to human and planetary health. We use a suite of model simulations and data analyses to evaluate the hydrological and nutritional impacts of agricultural intensification vs expansion and discuss their different suitability large scale farming vs smallholders.</p>

Global food security, biodiversity conservation and the future of agricultural intensification

2012 ◽  
Vol 151 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Teja Tscharntke ◽  
Yann Clough ◽  
Thomas C. Wanger ◽  
Louise Jackson ◽  
Iris Motzke ◽  
...  
Keyword(s):  
Food Security ◽  
Biodiversity Conservation ◽  
Agricultural Intensification ◽  
Global Food Security ◽  
The Future ◽  
Global Food
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