This journal article investigates the significance of drought and other water-related constraints in South Asia compared with other limitations to the production of four major food crops — wheat, rice, sorghum and chickpea — in five South Asian farming systems.

The study was based on a survey of 330 'expert informants'. It indicates that water shortages and constraints such as high-cost irrigation or flooding of low-lying fields contribute to no more than 30 per cent of current yield gaps in major food crops. Other constraints contribute the most to yield losses, particularly soil infertility and poor management of fertiliser, weeds, pests and diseases. The respondents suggested interventions to address these constraints and improve food security, which include biotechnology and improvements in soil fertility.

This report details the proceedings of the 2nd World Seed Conference, held on 8–10 September 2009 at the Food and Agriculture Organization (FAO) Headquarters, to investigate the role of plant breeding in improving seed quality and crop varieties that are crucial for food security.

The proceedings contain the presentations, discussions and conclusions from a one-day policy forum and the five sessions of the two-day expert forum. Areas covered include the importance of genetic resources for plant breeding, access and benefit sharing; plant variety protection; and the importance of seed quality in agriculture.

The conclusions emphasised the importance of encouraging plant breeding to enable the production and distribution of high-quality seed. Participants highlighted the International Treaty on Plant and Genetic Resources for Food and Agriculture as an innovative instrument for achieving food security through conservation and access to genetic resources, and the importance of protecting intellectual property. They also recommended that countries develop the capabilities needed to determine seed quality and certify seed varieties.

The conference was organised by the FAO, the Organisation for Economic Co-operation and Development, the International Union for the Protection of New Varieties of Plants, the International Seed Federation and the International Seed Testing Association.

This paper aims to assess the suitability of using self-reported food security indicators to assess the welfare impact of the 2007–2008 global food crisis. It tests the usefulness of data from the Gallup World Poll (GWP) — a survey of self-reported food insecurity conducted before, during, and after the crisis — as an alternative to modelling estimates produced by the UN Food and Agriculture Organization, the US Department of Agriculture, and the World Bank.

The results suggest that although trends vary across countries, global self-reported food insecurity fell between 2005 and 2008, with the most reasonable estimate indicating 60–250 million fewer food-insecure people over that period. This trend contrasts with what was estimated by modelling-based methods. It is driven by rapid economic growth and limited food price inflation in China and India, among other heavily populated countries.

This article, written by scientists in Niger and the United States, assesses the suitability of solar-powered irrigation for improving food security in rural regions of West Africa. The authors describe an irrigation system that combines drip irrigation with a photovoltaic solar-powered water pump, and test its efficacy and impact through household surveys and field data. They find that solar-powered drip irrigation is cost-effective and significantly boosts household incomes and nutritional intake.

This paper explains how interdisciplinary collaboration in health, nutrition, and agriculture has helped the Millennium Villages Project in 12 African villages meet the Millennium Development Goals.

Global science is increasingly under pressure to become more interdisciplinary. Econutrition is a good example of a cross-sector concept that joins environmental and human health, focusing on crosscutting areas such as agriculture and ecology.

Soil erosion and decreasing biodiversity causes environmental damage that lowers food production. A lack of food results in malnutrition and illness that, in turn, lead to poorer labour productivity and poorer agricultural management.

The Millennium Villages Project emphasises community engagement and leadership, and the case study from the Nyanza Province near Lake Victoria in Kenya illustrates that this can work well in improving nutrition.

One-fifth of adults in the area have HIV and many have malaria and TB. People in the region go hungry for up to seven months a year and are malnourished. The villagers constructed a health clinic and organised teams of community healthcare workers trained in nutrition.

Farmers receive fertilisers and plants if they donate ten per cent of their harvest towards a school lunch programme that concentrates on providing missing nutrients. For example, by adding local crops such as sweet potatoes common vitamin A deficiencies are eliminated. The key to success, say the authors, is to ensure that farmers are supported, especially in producing a variety of crops.

This review article, published in the African Journal of Food Agriculture Nutrition and Development, considers how policy interventions can protect vulnerable African nations from the increasing nutrition insecurity caused by the global economic crisis.

The author, Suresh Babu from the International Food Policy Research Institute, argues that the global recession has reduced foreign investment in, and demand for exports from, developing countries.

This has resulted in unstable commodity prices, lower earnings and reduced access to food, forcing people to adopt cheaper and less balanced diets that lead to higher levels of malnutrition.

Babu reviews past crises, including Indonesia in the aftermath of El Niño in 1997, to build a framework of potential policy interventions.

In the short-term, this includes subsidising fertilisers, distributing nutrition supplements and providing income support. In the medium to long-term, social safety net programmes, investment in research, and institution building are needed, says Babu.

This article, written by Chris Funk of the US GS, outlines how the Famine Early Warning Systems Network (FEWS NET) uses satellite data and statistical forecasts to provide early warnings of potential droughts in sub-Saharan Africa.

Funk outlines the role of satellite data in FEWS NET at all stages of the crop-growing season — from scenario building before the season to calculating the water balance during it and assessing yields at the end. Focusing on food security outlooks for East Africa in late 2008, Funk describes how data from NASA's Aqua and QuikSCAT satellites can be used to track moisture and wind conditions over the Indian Ocean and Africa, and how these help anticipate hydrologic conditions in the future to predict shortfalls.

Funk emphasises the need to combine such data with socio-economic analyses of, for example, crop prices, grain stores, political conditions and agricultural inputs. This will help maximise the accuracy and effectiveness of early warnings of drought and food shortages.

In this research article, Victor Konde of the University of Zambia argues that industrial biotechnologies can improve food security in Africa through improved livestock feeds and vaccines, as well as biotechnological pesticides, fertilisers and herbicides. He adds that biotechnology can also help farmers process crop and livestock products for new markets.

But Africa must first overcome a number of key challenges, says Konde — including restrictions on agricultural exports, weaknesses in scientific capacity and investment, and a lack of diplomatic strength to effectively promote its interests in international negotiations.

The author proposes ways for African policymakers to encourage biotech enterprise and investment, collaborative and interdisciplinary research, strategic alliances and public–private partnerships.

This research article assesses the potential for biotechnological approaches to overcome major pests, diseases and weeds undermining food security in Africa. The eight authors review three major constraints — parasitic weeds and herbicide-resistant grasses, insect pests, including those carrying plant diseases, and mycotoxins that damage stored grains.

They note that biotechnological solutions to some of these are already being explored, such as insect resistance in maize, but they say that others, like the control of parasitic weeds, will require longer-term study. The authors argue that these should be prioritised in public research programmes and supported by the private sector through donations of useful genes and technologies.

Their methodical discussion helps identify key priority areas for crop biotech research in Africa. This article will be useful to policy analysts, decision makers and research managers working in the field.