Nutrition-sensitive agriculture – a South African perspective

As environmental and social sustainability becomes more urgent, and the resilience of the industrial food system is under threat, addressing nutrition through food systems must go hand in hand with restructuring these systems for greater resilience. South Africa is a middle-income country with a highly dualistic agro-food system, dealing with the burden of undernutrition, diet-related chronic diseases and widespread micronutrient malnutrition. In South Africa, agriculture must maintain national food security while contributing to improving household food security through employment and production for own consumption; and providing access to a more diverse range of safe and quality foods at affordable prices. Agricultural activities can contribute to improved nutrition, if implemented in conjunction with direct nutrition interventions. This study gives an overview of the nutritional status of the South African population, and the history and current operations of the agro-food system. It identifies entry points for nutrition-sensitive agriculture (NSA) to begin to address food and nutrition security challenges. Case studies were identified using grey literature. With few exceptions, these cases were not NSA initiatives per se, yet demonstrated efforts that could inform actions to strengthen the nutrition-sensitivity of the South African food system. NSA is not an all-encompassing solution to food and nutrition insecurity in South Africa, but offers a way of strengthening the nutrition-sensitivity of agricultural initiatives. Viable entry points include linking small scale production and nutrition education; combining low external input farming and nutrition education; strengthening alternative marketing channels and local food economies; monitoring food prices; and developing appropriate governance and institutional arrangements.     

Coupling of soil regeneration,food security,and nutrition outcomes in Andean subsistence agroecosystems

To sustain the livelihoods of smallholder farmers globally, improved human nutrition must not sacrifice future agroecosystem productivity. We gathered environmental, agricultural management, food security (FS), and normalized child height for age (HAZ; children age < 2y) data from 297 farming households to test whether enhanced FS and nutrition goals can be aligned with agroecosystem maintenance in Andean farming systems that rely heavily on the local environment. Our results demonstrate many expected relationships between environment, agriculture, and nutrition in these communities’ households, for example between ecosystem biomass production and manuring rates, between total household crop production and FS, and between HAZ and child diet diversity. However, increased FS status evaluated by households was unrelated to HAZ as an indicator of nutrition status. By contrast, better child nutrition and feeding practices in some households were associated not with total production but with farming practices that sustain soils and secure higher per-hectare crop yields: longer fallows, greater crop diversity, and smaller cropped areas. These results may be explained by the tendency for agricultural practices correlated with household food insecurity (e.g. reduced manure inputs, greater cropped area) to increase labor and impede appropriate feeding and child nutrition while they accelerate environmental degradation. Crop production imperatives for food supply can thus degrade soils without delivering improved nutrition. Meanwhile, more sustainable practices in households with better child nutrition (e.g. smaller, better-manured crop areas) may address time barriers to effective care and feeding. We discuss challenges and opportunities based on these results for meeting both nutrition and environmental goals.     

Crops that feed the world 10. Past successes and future challenges to the role played by wheat in global food security

Wheat is fundamental to human civilization and has played an outstanding role in feeding a hungry world and improving global food security. The crop contributes about 20 % of the total dietary calories and proteins worldwide. Food demand in the developing regions is growing by 1 % annually and varies from 170 kg in Central Asia to 27 kg in East and South Africa. The developing regions (including China and Central Asia) account for roughly 53 % of the total harvested area and 50 % of the production. Unprecedented productivity growth from the Green Revolution (GR) since the 1960s dramatically transformed world wheat production, benefitting both producers and consumers through low production costs and low food prices. Modern wheat varieties were adopted more rapidly than any other technological innovation in the history of agriculture, recently reaching about 90 % of the area in developing regions. One of the key challenges today is to replace these varieties with new ones for better sustainability. While the GR “spared” essential ecosystems from conversion to agriculture, it also generated its own environmental problems. Also productivity increase is now slow or static. Achieving the productivity gains needed to ensure food security will therefore require more than a repeat performance of the GR of the past. Future demand will need to be achieved through sustainable intensification that combines better crop resistance to diseases and pests, adaptation to warmer climates, and reduced use of water, fertilizer, labor and fuel. Meeting these challenges will require concerted efforts in research and innovation to develop and deploy viable solutions. Substantive investment will be required to realize sustainable productivity growth through better technologies and policy and institutional innovations that facilitate farmer adoption and adaptation. The enduring lessons from the GR and the recent efforts for sustainable intensification of cereal systems in South Asia and other regions provide useful insights for the future.     

Expanding the boundaries of agricultural development

The challenges of reducing global hunger and poverty are different today than they were 30 years ago. Current challenges include price volatility associated with increased integration of food, energy, and finance markets; the steady progression of climate change; poorly defined land institutions; and a failure to break vicious cycles of malnutrition and infectious disease. Farmland speculation is occurring globally—often at odds with rural poverty alleviation—and food insecurity remains a pressing issue with the estimated number of chronically malnourished people hovering around one billion. Given these patterns, food and agriculture are becoming increasingly ingrained in international security and policy discussions. This paper explores several ways in which the traditional field of agricultural development needs to expand to address the broader issues of international security and human welfare. It focuses on five key interrelated issues: the macroeconomic and energy contexts of agricultural development; climate change; deforestation, land access, and land markets; farming systems and technology for the ultra-poor; and food-health linkages with a specific focus on infectious disease. Recommendations for investments in capacity building, revised curricula, and development projects are made on the basis of evidence presented for each issue. It is clear that academic programs, government agencies, development and aid organizations, and foundations need to dismantle the walls between disciplinary and programmatic fields, and to find new, innovative ways to reach real-world solutions.     

Global Hunger: A Challenge to Agricultural,Food, and Nutritional Sciences

Hunger has been a concern for generations and has continued to plague hundreds of millions of people around the world. Although many efforts have been devoted to reduce hunger, challenges such as growing competitions for natural resources, emerging climate changes and natural disasters, poverty, illiteracy, and diseases are posing threats to food security and intensifying the hunger crisis. Concerted efforts of scientists to improve agricultural and food productivity, technology, nutrition, and education are imperative to facilitate appropriate strategies for defeating hunger and malnutrition. This paper provides some aspects of world hunger issues and summarizes the efforts and measures aimed to alleviate food problems from the food and nutritional sciences perspectives. The prospects and constraints of some implemented strategies for alleviating hunger and achieving sustainable food security are also discussed. This comprehensive information source could provide insights into the development of a complementary framework for dealing with the global hunger issue.     

Implications of sustainable agriculture for the world food situation

Abstract

World population growth rate has slowed since the early 1970s, but growth in world grain production has slowed further. As a result, per capita grain production has declined since 1983. Conventional farming practices that use heavy chemical applications and high‐yielding varieties have resulted in soil erosion, depletion of natural resources, contamination of the environment, and reduced biodiversity; and threaten to diminish the world's ability to sustain life of all kinds. If these trends persist, the earth may not sustain an adequate level of food production. Transition to sustainable agricultural practices could presumably prevent most of this degradation but may not produce adequate supplies of food to meet the growing demand. Although yields from sustainable agricultural farms can be as high as those from conventional farms, food production per acre of rotation generally declines because sustainable farms need to incorporate green manure crops and forage legumes into their rotations. Therefore, food production must be increased, which can be done in two ways: either bring more land into cultivation or increase yields. Although there are large tracts of land still available, their fragile ecosystems make it costly to bring them into production. Future grain production must come from higher yields. However, several studies indicate that the growth of major crop yields is leveling off, and that it has become increasingly difficult to increase crop yields. Therefore, to meet future world food demand, we need to continue to invest in research to develop new technologies that are directed toward sustainable agriculture. Adoption of new technologies could break through the yield ceiling characterized by previous technologies and enable the yield growth rate to outpace the population growth rate.     

Agriculture and food security in selected countries in Sub-Saharan Africa: diversity in trends and opportunities

The World Food Summit in 1996 set the goal of reducing by half the numbers of malnourished people in the world by 2015. It is unlikely that this will be reached, and particularly not in Sub-Saharan Africa (SSA). Food imports in SSA have increased in the past 40 years, since domestic production could not keep up with population growth. Several studies have reported about this stagnating food production in SSA. However, this region encompasses a large number of countries, with a great variety of agroecological zones and large differences in land, labour and other resources. The objectives of this paper are to analyse agricultural production and food security in eight countries in Sub-Saharan Africa over the past 40 years, and to investigate to what extent these countries have followed different agricultural development pathways and are faced with different constraints. The analysis is largely based on statistical data, mainly from FAO, and on other information from various national and international sources. It shows that some of these countries have struggled to achieve and maintain overall national food security, while others have been able to achieve more than that and increased production at a faster rate than population growth. It subsequently analyzes major development constraints, with regard to labour, land and water, and institutions, pinpoints certain positive developments that have taken place in some of the countries and looks at opportunities for the respective countries to improve their food situation. One of its conclusions is that more attention should be paid to country specific constraints and opportunities.     

Potential of indigenous fruit-bearing trees to curb malnutrition,improve household food security,income and community health in Sub-Saharan Africa: A review

Sub-Saharan Africa (SSA) has an estimated annual population growth rate of 2.7% making it the highest globally. More than two thirds of the over 800 million people in the region stay in rural areas where they depend on subsistence agriculture. Socio-economic instability, poor soil fertility and unreliable rainfall result in poor crop yields. This exposes the vulnerable to food insecurity and inadequate nutrient intake. Malnutrition is not restricted to undernutrition as in the urban areas the adoption of diets rich in carbohydrates and fats also poses health problems associated with obesity. Malnutrition causes derangements in the immune system, thereby increasing susceptibility to and severity of infections among the affected population. In SSA, indigenous fruit bearing trees (IFBTs) are treasured sources of macro- and micro-nutrients, and health promoting phytochemicals. The phytochemicals have biological and pharmacological activities that mitigate some of the physiological effects of malnutrition. In this paper, the contribution of IFBTs such as Uapaca kirkiana and Adansonia digitata to household food security, rural economy and community health are highlighted. Examples of community-based projects dependent on fruit from IFBTs are given. Using this evidence the need for unlocking the seemingly hidden potential contribution of the genetically diverse IFBTs to food security is highlighted. In this regard, research should focus on how to tap into health benefits of oils from IFBTs seeds. Residual cakes from oil extraction could be developed into biofuels, bio-fertilisers and animal feed ingredients. Fruit pulp could be exploited to produce more health-promoting natural sweeteners and pectins for industrial use. This beneficiation and value addition of products from IFBTs over and above contributing to the enhancement of household food security and the rural economy would translate into increased community-based sustainable utilisation and conservation of IFBTs.     

The importance of plant health to food security

Rapid food price rises have highlighted serious concerns about food security globally and have had a huge impact on achieving Millennium Development Goal 1. Since 2007, an estimated 100 million more people have fallen into absolute poverty. Most live in developing countries where low incomes (less than $1 per day) make it difficult to access food. Access to sufficient food for dietary needs and food preferences defines food security. However, whilst price rises have brought food security into sharp focus, underlying problems need to be addressed. Over the last three to four decades, there has been chronic under-investment in agriculture at all levels. Development aid to agriculture has declined and often in-country policies do not support the sector. Low crop yields are common in many developing countries and improved productivity is vital to reducing rural poverty and increasing food security. Whilst the causes of low productivity are complex, one major contributory factor is crop losses due to plant health problems. Often accurate information on the extent of these losses is missing but estimates of 30–40% loss annually from “field to fork” are common. Any future solution regarding improved global food security must address these losses and that means improving plant health. Two trans-boundary diseases, wheat stem rust race Ug99 and Coffee Wilt Disease of Coffea are highlighted. CABI has a number of plant health initiatives and one radical approach (Global Plant Clinic) involves partnership with in-country services to deliver plant health advice to farmers at the point of demand. Such innovations are entirely consistent with a proposed new “Green Revolution” which would need to be “knowledge intensive”.     

Econutrition: implementation models from the Millennium Villages Project in Africa

Econutrition integrates environmental health and human health, with a particular focus on the interactions among the fields of agriculture, ecology, and human nutrition. Soil loss and degradation and human undernutrition are major barriers to economic development in Africa. A primary aim of the Millennium Villages Project in Africa is to meet the Millennium Development Goals by integrated multisectoral interventions in health and nutrition, agriculture, and environmental sustainability in hunger and poverty hot spots in Africa. Econutrition is only one example of how interdisciplinary approaches are not only critical to alleviating extreme poverty but also fundamental to linking basic science understanding in multiple areas. Human health and agricultural productivity gain, and the costs of the gains are lowered, when we take the opportunity to apply different disciplines through cross-sectoral, thematically linked interventions.     

The use of indigenous ecological resources for pest control in Africa

Reducing the losses from crop pests will help to increase food availability and boost economic growth in sub-Saharan Africa (SSA). However, the existing crop protection paradigm that relies on synthetic agrochemical pesticides has had only a marginal impact on the productivity of many poor smallholder farmers who constitute a major segment of agriculture in SSA. This is primarily because many of them are not able to afford or access these imported chemicals. A solution to this crop protection problem may be to harness biological resources that are locally available, such as endemic insect natural enemies and indigenous pesticidal plant materials. Two specific examples of this already under development in Africa are the use of the pesticidal plant, Tephrosia vogelii, and the harvesting of the endemic insect baculovirus, Spodoptera exempta nucleopolyhedrovirus (SpexNPV). Both of these can be produced locally and have shown promise in trials as inexpensive and effective tools for pest control in Africa and their use is currently being scaled up and evaluated by African networks of researchers. A focus on these systems illustrates the potential for using locally-available natural resources for improved crop protection in Africa. The consideration of these pesticidal plants and insect natural enemies in the wider context of natural capital that provide valuable ecosystem services (including pest control), will facilitate greater recognition of their true economic and societal worth. While both of these model systems show promise, there are also very significant challenges to be overcome in developing production, supply and marketing systems that are economically viable and sustainable. The regulatory environment must also evolve to accommodate and facilitate the registration of new products and the establishment of appropriate supply chains that share the benefits of these resources equitably with the local communities from which they are harvested.     

African nightshades (Solanum nigrum complex): The potential contribution to human nutrition and livelihoods in sub-Saharan Africa

Achieving zero hunger in sub-Saharan Africa (SSA) without minimizing postharvest losses of agricultural products is impossible. Therefore, a holistic approach is vital to end hunger, simultaneously improving food security, diversity, and livelihoods. This review focuses on the African nightshades (ANS) Solanum spp. contribution to improving food and nutrition security in SSA. Different parts of ANS are utilized as food and medicine; however, pests and diseases hinder ANS utilization. African nightshade is rich in micronutrients such as β-carotene, vitamins C and E, minerals (iron, calcium, and zinc), and dietary fiber. The leaves contain a high amount of nutrients than the berries. Proper utilization of ANS can contribute to ending hidden hunger, mainly in children and pregnant women. Literature shows that ANS contains antinutritional factors such as oxalate, phytate, nitrate, and alkaloids; however, their quantities are low to cause potential health effects. Several improved varieties with high yields, rich in nutrients, and low alkaloids have been developed in SSA. Various processing and preservation techniques such as cooking, drying, and fermentation are feasible techniques for value addition on ANS in SSA; moreover, most societies are yet to adopt them effectively. Furthermore, promoting value addition and commercialization of ANS is of importance and can create more jobs. Therefore, this review provides an overview of ANS production and challenges that hinder their utilization, possible solutions, and future research suggestions. This review concludes that ANS is an essential nutritious leafy vegetable for improving nutrition and livelihoods in SSA.     

Exploring the impact of the 2008 global food crisis on food security among vulnerable households in rural South Africa

Recurring food crises endanger the livelihoods of millions of households in developing countries around the globe. Owing to the importance of this issue, we explored recent changes in food security between the years 2004 and 2010 in a rural district in Northeastern South Africa. Our study window spans the time of the 2008 global food crisis and allows the investigation of its impacts on rural South African populations. Grounded in the sustainable livelihood framework, we examined differences in food security trajectories among vulnerable sub populations. A unique panel data set of 8,147 households, provided by the Agincourt Health and Demographic Surveillance System (Agincourt HDSS), allowed us to employ a longitudinal multilevel modeling approach to estimate adjusted growth curves for the differential changes in food security across time. We observed an overall improvement in food security that leveled off after 2008, most likely resulting from the global food crisis. In addition, we discovered significant differences in food security trajectories for various sub populations. For example, female-headed households and those living in areas with better access to natural resources differentially improved their food security situation, compared to male-headed households and those households with lower levels of natural resource access. However, former Mozambican refugees witnessed a decline in food security. Therefore, poverty alleviation programs for the Agincourt region should work to improve the food security of vulnerable households, such as former Mozambican refugees.     

Food and cash: understanding the role of the retail sector in rural food security in South Africa

A decline in subsistence agriculture across sub-Saharan Africa has meant an increased role for the private sector in food security strategies, but this role remains a relatively blind spot in food policy. We address this gap by analyzing retailers and consumers in a rural region of South Africa. Our results show that purchasing food is an important food security strategy for the rural poor, but is constrained by a lack of access to income. Furthermore, a reliance on specific non-perishable foodstuffs impacts the micronutrients that the poorest can access if they are unable to grow their own fresh produce. Adaptive food policy thus requires a holistic appreciation of the food system - emphasizing production as well as building livelihoods outside of agriculture.     

Agrosecurity: The Role of the Agricultural Experiment Stations

ABSTRACT: In order to protect the nation's agriculture and food processing systems from the new threat of bioterror‐ism, agricultural and food technology research must be effectively harnessed and applied. The U.S. conducts the majority of its agricultural research through state‐based Agricultural Experiment Stations. To respond to the new challenges of biosecurity, and to facilitate communication between the federal research system and the state‐based agricultural research system, the Directors of the State Agricultural Experiment Stations (SAES) facilitated the creation of a National Institute for Agricultural Security (NIAS). The mission of NIAS is to help address national homeland security and biosecurity issues that affect the nation's farms and ranches, food production and distribution system, and rural communities by harnessing, coordinating, and targeting agricultural research and food science technology projects. NIAS was created to provide a “front door” and “one‐stop shopping” for federal agencies and the public. NIAS is currently developing projects to improve site security at SAES field stations and laboratories. The Institute is facilitating the development of prototype‐secured information technology networks. NIAS is serving as a liaison to federal agency offices to help identify high priority agricultural and food science research needs. The Institute is also exploring the possibility of collaborating in the development of regional pathogen outbreak simulations with the regional university coordinators of the Dept. of Agriculture's National Plant Diagnostics Network (NPDN). NIAS is collaborating with the Institute for Countermeasures Against Bioterrorism to host an international workshop on the managing of events when harmful pathogens are introduced into the food supply. And, NIAS is exploring the potential role of university Cooperative Extension Service as part of the “first responder network,” as “first detectors,” and as facilitators for helping rural community leaders plan to address homeland security concerns.     

Mussel and oyster culture in Saldanha Bay, South Africa: potential for sustainable growth, development and employment creation

Worldwide declines in fish stocks have a significant impact on the livelihoods of coastal fishing communities as jobs are lost and alternative forms of employment are limited. Mariculture (marine aquaculture) is considered by governments to be a viable solution to address unemployment and poverty in such communities. In Saldanha Bay, South Africa, the growing mussel and oyster industry has considerable potential for poverty alleviation, hence food security enhancement. In the first part of this study, we examine the potential ecological carrying capacity of the Bay to produce bivalves, and estimate the impact of this on employment creation should the sector’s growth potential be fully realised. This growth potential could take the sector to 10 to 28 times its current size, providing direct employment for 940 to 2,500 people in the Saldanha area. Secondly, we assess five factors that affect the sustainable growth, development and employment creation potential of small-scale mariculture in South Africa and other countries. These are state support, markets, funding, the natural environment and the local community. Participants in the sector perceive its expansion potential to be hampered by regulatory issues such as incomplete implementation of a cohesive and accessible financial support policy, slow processing of mandatory samples required to monitor product safety, poor facilitation of access to international markets, price undercutting by imports subsidized in their countries of origin, and injuriously high lease fees for water levied by the parastatal harbour authority, coupled with lack of medium- and long-term lease tenure. The risk of environmental degradation from competing harbour use by large, fossil fuel and ore transport industries is of potential future concern.     

Shocks in economic growth = shocking effects for food security?

The recent economic and financial turmoil raises the question on how global economic growth affects agricultural commodity markets and, hence, food security. To address this question, this paper assesses the potential impacts of faster economic growth in developed and emerging economies on the one hand and a replication of the recent economic downturn on the other hand. The empirical analysis uses AGLINK-COSIMO, a recursive-dynamic, partial equilibrium, supply–demand model. Simulation results demonstrate that higher economic growth influences demand more than supply, resulting in higher world market prices for agricultural commodities. Emerging economies tend to import more and to stock less in order to cover their demand needs, while the rest of the world increases its exports. The modelled faster economic growth also helps developing countries to improve their trade balance, but does not necessarily give them the incentive to address domestic food security concerns by boosting domestic consumption. A replication of an economic downturn leads to lower world prices, and while the magnitude of the effects decreases over time, markets do not regain their baseline levels within a 5-year period. Due to the lower world market prices, developing countries import more and increase their per capita food calorie intake. However, as developing countries become more import dependent, this also implies that they become more vulnerable to disruptions in agricultural world markets.     

Symposium 2 Part 2: Food Production for a Growing World Population

ABSTRACT: Transition towards sustainable development is claimed as a common goal for the world society in many different documents. Within the agricultural sector, this transition is extremely urgent, since agricultural food production is fundamental to the survival of our civilization. Together with a rapidly growing world population, there are losses of arable land due to erosion and soil infertility caused by nonsustainable production methods. Along with such problems follow potential contamination of groundwater resources as well. Most of the nutrient and pesticide contamination of groundwater originates from agricultural soils. In this presentation, sound solutions to the major environmental issues of limiting contamination of soils and groundwater by modifying agricultural practices are discussed. The causes of pollution are briefly explained and existing measures for the reduction of agricultural non-point-source pollution of nutrients and pesticides are described, analyzed, and evaluated.     

Preface: Challenges and opportunities for enhancing food security in Kenya

Achieving sustainable food security in Sub-Saharan Africa is one of the main challenges facing African governments and the international community. The 2007?C2008 food crisis and ongoing chronic hunger problems clearly demonstrate that millions of people on the continent, including in relatively stable countries such as Kenya, are dangerously vulnerable to economic, political and climatic shocks that threaten food availability and accessibility. At the heart of the strategies to build resilience and tackle food insecurity is the need for effective institutional and policy frameworks that can support local innovations while taking into account the biophysical, social and economic constraints within which rural livelihoods operate. The papers included in this Special Issue of Food Security support the view that for food security initiatives in Kenya to be effective, they must embrace solutions that are equitable, generalizable and ecologically sound to ensure sustainability. Ultimately, to improve innovation and technology adoption, a systems approach that allows women and men, wealthy and poor farmers to engage with scientific and political elites in the design and implementation of food-related research and development initiatives must be embraced. There is also the need to develop tools and approaches that can assist smallholder farmers, researchers, policy makers and other stakeholders to share a better understanding of the multiple factors driving food insecurity and hindering the implementation of effective policies and institutions.