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Tag: Crop production

Effect of Climate Change on Crop Yields in the 2040s under the Medium Impact Scenario, no adaptation and no irrigation water constraints
Water constraints are perceived as the most severe impact of climate change on the agricultural sector. Climate change will inevitably increase the number of areas needing irrigation, the water demand for crops, and ...
27 Jun 2015 - by GRID-Arendal/Manana Kurtubadze
Effect of Climate Change on Crop Yields in the 2040s in the South Caucasus
The changes in crop yields, however, vary between locations. For certain crops in the mountain regionsthe changes may, in some cases, be beneficial. When assessing the impact of changes in temperature and precipitation, ...
27 Jun 2015 - by GRID-Arendal/Manana Kurtubadze
Effects on Agriculture - SLCPs, a Threat to Agricultural Productivity
SLCPs, especially tropospheric O3, detrimentally impact ecosystems including crop yields, and are affecting food security. Present day global relative yield losses due to tropospheric O3 exposure has been estimated for f...
19 Jun 2014 - by GRID-Arendal
Soy Expansion in the Brazilian Amazon frontier
Often, small-scale farmers settle the areas along logging roads in order to burn secondary or cleared forest for crop production. These farmers are eventually pushed or bought-out by large-scale cattle ranchers or soy p...
27 Sep 2012 - by GRID-Arendal
Suitability by crop type in Uganda
Recently Uganda has outlined its national strategy for bioenergy to contribute to increasing the renewable energy mix from 4 to 16 percent by 2017. Several biofuel crops have been identified, including sugarcane, m...
01 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Biofuels crops and biodiversity
Biofuels pose several environmental and social risks. Therefore, to be truly a part of the green economy, biofuels need to comply with a set of safeguards along the entire production chain. Any bioenergy development ...
08 Mar 2012 - by Riccardo Pravettoni, UNEP/GRID-Arendal
Differentiation between crops, land-use and end-use efficiency
The energy gain from biofuels is often expressed as a ratio of biofuel energy output to fossil energy input. However, when considering which biofuels are the most efficient using this metric, allowance must also be m...
01 Mar 2012 - by Nieves Lopez Izquierdo
Changes in agricultural land (pasture and cropland)
For all developing countries over the period 1961–99, expansion of harvested land contributed only 29% to growth in crop production versus the contribution of increases in yields, which amounted to 71%; in sub-Saharan Af...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Major genetically modified crop production countries, 2006
Some regions report increases in some crops and positive financial returns have been reported for genetically modified cotton in studies including South Africa, Argentina, China, India and Mexico. In contrast, the US and...
03 Jan 2008 - by IAASTD/Ketill Berger, UNEP/GRID-Arendal
Food consumption – trends and projections
Increase in crop production has mainly been a function of increases in yield due to increased irrigation and fertilizer use. However, this may change in the future towards more reliance on cropland expansion, at the co...
02 Feb 2009 - by Hugo Ahlenius, UNEP/GRID-Arendal
Freshwater use by sector at the beginning of the 2000s
The agricultural sector is by far the biggest user of freshwater. Analysis indicates that: - In the United States, agriculture accounts for some 49% of total freshwater use, with 80% of this volume being used for irriga...
26 Jan 2009 - by Philippe Rekacewicz (Le Monde diplomatique)