Skip to main content

Approaches to Reinforce Crop Productivity under Water-Limited Conditions in Sub-Humid Environments in Sub-Saharan Africa

Date of Publication
Oct 01, 2015
Description/Abstract

Smallholder farming in much of Sub-Saharan Africa is rain-fed and thus exposed to rainfall variability. Among the climate variables, rainfall is projected to decline and have an overriding effect on crop productivity. With little opportunity for supplementary irrigation for the majority of farmers, a plausible strategy to maintain crop production under water-limited conditions includes balanced nutrient management for enhancing efficiency of use of limited soil water. Co-application of judicious rates of organic and mineral nutrient resources, particularly including the use of phosphorus (P) on P-limited soils, will facilitate development of an extensive crop rooting system for efficient exploration and capture of soil water, especially at a depth > 0.8 m. This chapter explores case studies across Eastern and Southern Africa where various soil water conservation and nutrient management approaches have been used to gain ‘extra miles’ with limited available soil water. Firstly, an approach is described that varies nitrogen (N) fertilizer application across growing seasons, by adjusting N application rates to match current season rainfall trends. The approach offers opportunities for farmers to increase crop productivity to > 6 t ha-1 in high agro-potential areas, compared to a ceiling of 4.5 t ha-1 for the fixed fertilization model, while minimizing economic losses due to investments in N fertilizer during drought years. Secondly, we deal with the subject of fertilization across nutrient gradients, where a poor agronomic N use efficiency of < 18 kg grain kg-1 of applied N is demonstrated for soils with < 0.4% organic carbon, compared with > 35 kg grain kg-1 of N applied when soil organic carbon > 0.5%. Thirdly, the conservation agriculture (CA)-nutrient management nexus is examined, where maize yields in farmers’ fields with CA alone were barely 0.5 t ha-1 compared to an average of 2.5 t ha-1 for CA combined with fertilizers. Fourthly, a novel system that involves intercropping two legumes with contrasting phenology for enhanced cropping system functioning is described. Finally, an approach that can be used for co-learning with farmers on soil fertility management principles for risk management is presented. The data lead to the conclusion that the ‘doubled-up’ legumes system results in reduced fertilizer requirements for cereal crops grown in sequence, which benefits yield stability over time. Variable use of N fertilizer according to season quality and more tailored targeting of nutrients are vital for profitable investments in fertilizers in Africa. The Africa RISING project in Eastern and Southern Africa is currently harnessing some of these principles as vehicles for intensification of smallholder farming systems.

Author or Institution as Author
Messina J.
Co-authors

Nyamangara J. , Bekunda M. , R. Chikowo, Zingore S., Snapp S.

Language
Category
Resource Type
Citation

Chikowo, R & Zingore, Shamie & Nyamangara, Justice & Bekunda, Mateete & Messina, Joseph & Snapp, Sieglinde. (2015). Approaches to reinforce crop productivity under water-limited conditions in sub-humid environments in Africa. In Sustainable Intensification to advance Food Security and Enhance Climate Resilience in Africa. 239-253. 10.1007/978-3-319-09360-4_12

Disease Surveillance on some farms in Mkushi District of the Central Province of Zambia

Date of Publication
May 01, 2016
Description/Abstract

Plant Quarantine and Phytosanitary Service (PQPS-ZARI)

Disease Surveillance on some farms in Mkushi District of the Central Province of Zambia

Author or Institution as Author
ZARI Plant Quarantine & Phytosanitary Service (PQPS)
Institution
Ministry of Agriculture
Language
Resource Type
Citation

ZARI Plant Quarantine & Phytosanitary Service (PQPS). (2016). Disease Surveillance on some farms in Mkushi District of the Central Province of Zambia.

Development of A Smart Sprayer for Smallholder Farmers

Date of Publication
Aug 01, 2016
Description/Abstract

The presentation focused on developing  a smart sprayer for smallholder farmers in conservation agriculture. Its Future application in crop production will reduce herbicide and pesticide and overall support of smallholder farmers who are passionate about CA in other countries to address climate change.

Author or Institution as Author
Tingmin Yu
Co-authors

Agricultural Research Council

Institution
CCARDESA
Language
Resource Type
Citation

Tingmin Yu and Agricultural Research Council –Institute for Agricultural Engineering (ARC-IAE), South Africa, 8/2016. Development of A Smart Sprayer for Smallholder Farmers.

A Call for Scaling-Up Response to the Worsening Drought

Date of Publication
Mar 01, 2016
Description/Abstract

A multi­stakeholders meeting, jointly hosted by the Office of the President and Cabinet and the UN System in Zimbabwe, held today called for scaling up of humanitarian assistance to address the immediate needs of 2.8 million (30% of the total population) drought-­affected people.

Addressing over 170 senior representatives from Government; Diplomatic Corps; Development and Humanitarian Partners; Civil Society Organizations; Non­Governmental Organizations; Private Sector; and the Media; the UN Resident and UNDP Resident Representative, Bishow Parajuli emphasized that “the drought conditions in many parts of the country have been unprecedented and have severely increased the vulnerability of the poor depriving them of their livelihoods including livestock and agricultural production as well as access to water, nutrition, health and education services”.

Like many parts of Southern Africa region, Zimbabwe has been hard­hit by the effects of El Nino, with harvests devastated. The current rainfall season has so far been the driest in the last 35 years rendering over 28 million people food­insecure in the region. The late onset of rains in Zimbabwe apparently reported to be below normal, coupled with higher than average temperatures, has severely affected the prospect of 2015/2016 crop production, livestock and rural livelihoods.

Author or Institution as Author
other
Co-authors

Office of the United Nations Resident coodinator

Language
Category
Resource Type

Seychelles National Agricultural Investment plan 2015-2020

Date of Publication
Jan 01, 2015
Description/Abstract

The Seychelles National Agricultural Investment Plan (SNAIP) is a framework that seeks toharmonize, consolidate and accelerate the implementation of the country’s agriculture and food security and nutrition related policies and strategies in the period 2015 to 2020. SNAIP sets thecountry’s agriculture and food security and nutrition development for the next five years within thecontext of the Medium Term Expenditure Framework (MTEF).

Author or Institution as Author
Ministry Fisheries and Agriculture Seychelles
Institution
Seychelles
Language
Resource Type
Citation

Ministry Fisheries and Agriculture, Seychelles, 1/2015. Seychelles National Agricultural Investment plan 2015-2020.

Rising Waters: working together on Cape Town’s flooding

Date of Publication
Oct 01, 2013
Description/Abstract

Flooding happens annually in Cape Town’s informal settlements. The impact on residents’ lives is enormous, yet people have few resources to cope. They are also society’s most vulnerable: often unemployed, living in shacks, and with nowhere else to settle but where the water gathers each year. These communities will also bear the brunt of the likely increase in flood events as climate change makes the Cape’s heavy rains more severe and frequent.

We cannot avoid the underlying reasons for why these communities find themselves in such vulnerable circumstances, or the fact that flooding-related humanitarian crises will continue to plague these communities and the city charged with assisting them.

It’s critical to find sustainable, workable flooding responses, now. This means involving communities in flood-prone informal settlements in decision-making processes. The City of Cape Town is responsible for coordinating this response, but has difficulty when it comes to involving local communities.

This book explores the challenges and opportunities of collaborative governance as a way to get a broader group of stakeholders involved in flooding responses, as part of our ongoing research through the Flooding in Cape Town under Climate Risk (FliCCR) project.

Author or Institution as Author
other
Co-authors

African Centre for Cities, University of Cape Town

Language
Category
Resource Type

La culture de l’arbre à pain

Date of Publication
Jun 01, 2012
Description/Abstract

L’arbre à pain appartient à la famille des Moracées et il est originaire des régions du Pacifique. La chair du fruit à pain est très riche en hydrate de carbone. Elle est aussi bien pourvue en fibre, minéraux tels que potassium, magnésium, calcium et en vitamines B et C. Le fruit à pain est appelé à jouer un rôle important pour la sécurité alimentaire.
Cliquer sur le lien pour lire plus sur cette  fiche technique qui explique comment cultiver de l’arbre à pain.

Author or Institution as Author
Food and Agricultural Research and Extension Institute, Mauritius
Institution
Mauritius
Language
Resource Type
Citation

Food and Agricultural Research and Extension Institute, Mauritius, 2012. La culture de l’arbre à pain.

Talk on Zero Budget Natural Farming (ZBNF) by Mr Subhash Palekar in Mauritius

Date of Publication
Jul 01, 2016
Description/Abstract

Mr Subhash Palekar gave a public talk on talk on Zero Budget Natural Farming (ZBNF) on 28.07.16 at the Farmer Training School of the Food and Research and Extension Institute in Mauritius. “Zero Budget spiritual Farming means for all the crops, the production cost will be zero. In the Zero Budget Natural Farming nothing has to be purchased from the outside. All things required for the growth of the plant are available around the root zone of the plants.” …. Read more on his website.

Author or Institution as Author
Mr Subhash Palekar
Institution
Zero Budget Natural Farming (ZBNF)
Language
Resource Type
Citation

Mauritius 07/2016. Talk on Zero Budget Natural Farming (ZBNF) by Mr Subhash Palekar in Mauritius.

Outcomes of the Ministerial workshop on Food Security and Poverty Eradication

Date of Publication
May 01, 2016
Description/Abstract

This publication is a report of the outcomes of the workshop convened by His Excellency, Lt. General Dr. Seretse Khama Ian Khama, President of Botswana and Chairperson of SADC in May 2016 on Food Security and Poverty Eradication to exchange ideas on how to address several food and nutrition security challenges in Southern Africa.

Author or Institution as Author
SADC Secretariat
Institution
SADC
Language
Resource Type
Citation

SADC. (2016) Outcomes of the Ministerial workshop on Food Security and Poverty Eradication.

Cape of storms – sharing the coast in the face of turbulent, rising seas

Date of Publication
Oct 01, 2013
Description/Abstract

The Cape coastline faces into a turbulent ocean. Climate change will make this naturally stormy sea all the more formidable. Cape Town has inherited a complex space to manage: land reclaimed from the sea for forts and harbour walls; towering residential flats lined with cemented promenades; economically critical ports and railway lines; ecologically sensitive beaches, dunes and river mouths; and a legacy of dispossession of black South Africans, and privileged access for wealthy whites.

Increasingly stormy seas and higher sea levels are beginning to show up the existing fault lines in the engineered, social and institutional strata of this complex coastline. People working within the City of Cape Town (CoCT) today are making decisions about how to manage these vulnerable spaces – decisions that future generations will have to live and work with.

Short-term, piece-meal, opportunistic responses to the threat of stormier seas will only increase how vulnerable the built city, its inhabitants, economic activities, and the natural environment are. The City, lead by its Environmental Resource Management Department, is developing a rigorous coastal policy and management framework that will enable politicians, managers and residents to respond consistently and appropriately as they are confronted with an uncertain, dynamic, climate-altered future.

This booklet presents research done by the University of Cape Town’s African Centre for Cities, the Stockholm Environment Institute and partner institutions, working closely with the City of Cape Town, to explore ways to manage changing coastal risks

Author or Institution as Author
Leonie Joubert
Co-authors

Anton Cartwright, Gregg Oelofse, Darryl Colenbrander, Anna Taylor, Lucinda Fairhurst and Geoff Brundrit.

Language
Category
Resource Type
Subscribe to Curated Content

Funding Partners