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This report by the Food and Agriculture Organisation of the United Nations (FAO) aims to inform decision-making that focuses on reducing impacts on natural capital.
A new paper published in Global Change Biology looks into the effects of increasing CO2 levels on protein in crops. The study finds that not only can increased CO2 be a problem for food security through climate change, but it can also directly impact the nutritional value of crops.
A new paper produced by a global group of agrosystem modellers, argues that if no action is taken to adapt, the future global wheat harvest is likely to be reduced by 6 % per each degree Celsius of local temperature increase. This would correspond to 42 million tonnes of yield reduction worldwide, which equals a quarter of current global wheat trade.
The authors behind this study say that climate change has substantially increased the prospect that crop production will fail to keep up with rising demand in the next 20 years.
This is the first global study to quantify the extent to which global crop diversity has narrowed over time and how and where those changes have occurred.
This paper investigates whether current yield trajectories are adequate to achieve the production increases that many forecasts suggest are needed on existing farmland. The results indicate that the majority of global cereal crops such as rice, wheat and corn may have reached their maximum possible yields. Six statistical models were analysed to identifying the most appropriate shape of historical yield trend and the analysis makes it possible to estimate in which countries and regions yields are flat, rising, declining or plateauing.
This IFPRI (International Food Policy Research Institute) policy note summarises the results of a study that compares the effects that different technologies have on crop yields and resource use, in particular arable land, water and nutrient inputs. It models technology-induced changes in crop yields and considers how the mix of technology uptake can influence the global food market through changes in food prices and trade flows, as well as calorie availability, in particular for developing countries.
This paper contributes to the ongoing discussion on sustainable intensiﬁcation in agriculture, focusing on the question of whether further yield increases are still possible. The researchers looked at trends in productivity increases achieved through the introduction of new varieties in the Netherlands between 1980 and 2010. A statistical technique allowed them to separate the influence of weather, CO2 levels and crop management from the effect of the new varieties themselves.
Yet another paper adding to the growing body of evidence that productionist approaches to addressing food security challenges are unlikely to be sufficient (at least not without unacceptable environmental cost). Shifts towards more plant based diets and measures to address food waste are also needed.
Researchers at the University of Gothenburg, Sweden, have published a study in the journal Global Change Biology claiming that rising levels of atmospheric carbon dioxide have a negative impact on the protein content of wheat grain and thus its nutritional quality.
The Bioenergy Strategy commits the UK Government to further work to investigate the merits of temporarily flexing or otherwise relaxing biofuels mandates at times of agricultural price pressures. The current paper presents work by Defra analysts to explore some of the potential implications of this idea.