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Published By Sage Publications

2043-6866, 0030-7270

2022 ◽  
pp. 003072702110731
Author(s):  
K.G. Cassman ◽  
D.J. Connor

Perennial grain crops have been proposed as environmentally sustainable alternatives to annual grain crop systems that currently dominate the world's major breadbaskets. Proponents emphasize the potential of perennial grains to mimic natural systems and thereby reduce soil erosion, nutrient losses, and degradation of soil quality although need for adequate grain yield is also recognized as a prerequisite for success. Here we assess progress since 2005 (16 y) towards development of perennial grain systems with sufficient productivity to be seen as competent alternatives to annual wheat on the prairies and plains of North America and Australia. Based on reports published in refereed journals, we see little evidence that yield of Intermediate Wheatgrass or perennial wheats have improved to the point they are viable alternatives. Slow progress is attributed to lack of minimum grain yield targets for economic viability, lack of designated target regions where perennial grains are most likely to be competitive against annuals, selection methods that focused on components of yield rather than yield per se (i.e. on an area basis), and relatively small R & D investment compared to resources given to genetic and agronomic improvement of major annual grain crops. Given current status, we conclude that perennial grains will require substantial R & D investment and several decades if they are to achieve sufficient yield potential and yield persistence to become more than a niche crop for upscale health food markets in wealthy countries.


2022 ◽  
pp. 003072702110703
Author(s):  
Bart Gremmen

As populations increase and economic affluence expand, conventional farmers will be unable to meet the demand for food. Two main scenarios offer different solutions. The first scenario aims to further intensify scientific- and technology-driven agriculture research. The second scenario aims to radically switch to nature-based solutions in agricultural systems. There seem to be two interpretations of the nature-based solutions scenario: on the one hand, the interpretation of the IUCN regards nature-based solutions, such as regenerative agriculture, as using nature and denies a link with biomimicry; and on the other hand, the interpretation of the EU regards regenerative agriculture as an example of biomimicry. This raises the question: is regenerative agriculture a prime example of biomimicry or is it only a very important way to use nature in agriculture? To answer this question, we take a step back and philosophically reflect on biomimicry. Based on two definitions of mimesis, we distinguish between two concepts of biomimicry, a ‘strong’ concept which emphasizes natural principles and copying natural models, and a ‘weak’ concept, which emphasizes inspiration by nature and creative invention. Secondly, we describe and analyze regenerative agriculture as part of the nature-based solutions scenario and interpret regenerative agriculture first as ‘weak’ and then as ‘strong’ biomimicry. Both interpretations have their problems. To address these, we propose a new concept of biomimicry based on a new definition of mimesis. This enable us to differentiate between biomimicry, strict imitation of nature, and nature-inspired invention. We argue that our conceptualization of biomimicry helps to operationalize regenerative agriculture as a biomimetic technology.


2021 ◽  
Vol 50 (4) ◽  
pp. 418-440 ◽  
Author(s):  
Claris Riungu ◽  
Harro Maat ◽  
Marrit Van Den Berg

This paper examines the learning process by which farmers come to a decision to use newly introduced seeds which were promoted through demonstration plots in midwestern and eastern regions of Uganda. Framed as social and material interactions, we investigated the learning process of the demonstration plots using data from focus group discussions, interviews and a survey amongst 983 individuals. The results reveal several constraints that impede learning, resulting in an overall low awareness and adoption of the introduced seeds. Some of the most prominent constraints resulted from the selection of location and demonstration plot host, the distance of agro-dealers, at district headquarters, limited interactions amongst farmers and irregular involvement of farmers in the demonstrations. Moreover, the prominent role of agro-dealers at field days suggests that informing farmers about where to buy seeds was considered more important than explaining farmers how to grow these seeds profitably. This commercial focus of field days and demonstrations plots had negative consequences for the social learning. This paper contributes to the learning and adoption literature by showing that interactions amongst actors can improve or reduce the balance between didactic, social and environmental learning.


2021 ◽  
Vol 50 (4) ◽  
pp. 441-454 ◽  
Author(s):  
Fleur Kilwinger ◽  
Samuel Mugambi ◽  
Rhys Manners ◽  
Marc Schut ◽  
Silver Tumwegamire ◽  
...  

The overdependency on local cassava varieties and informal seed sources by farmers in Rwanda has contributed to the spread of cassava viral diseases. The use of improved planting materials made available through formal seed sources, that assure seed quality, is one way to prevent future disease outbreaks. In order to increase the availability of, and farmers access to, such materials there is increasing interest to develop seed business models. This study aims to understand seed sourcing practices of different farm typologies to inform the development of tailored seed business models. A total of 390 farmers were interviewed and the collected data was analyzed into clusters, resulting in seven farm typologies. Seed sourcing strategies, seed replacement dynamics and purchasing behavior of these typologies were explored via a seed tracing study. We find that more commercial oriented farmers have better access to formal seed sources. Nevertheless, the majority of farmers in all typologies accessed new varieties and quality cassava seed via informal channels. At both formal and informal sources, cash investments in seed were mainly made by the categories of better-off farmers, and were one-time investments to acquire a new variety. Based on farmers current seed sourcing practices, clarifications on the differences between farmers and their willingness-to-pay, the roles of seed degeneration, cost-benefit analysis, value propositions and profit formulas seem important requirements for the further development of viable cassava seed business models. We conclude that tailoring seed business models can have a high potential as it acknowledges differences among farmers, but that careful coordination is needed to ensure that one approach or intervention does not contrast with and/or undermine the others.


2021 ◽  
Vol 50 (4) ◽  
pp. 353-355
Author(s):  
Conny J.M. Almekinders ◽  
Kai Mausch ◽  
Jason Donovan

This special issue is a collection of papers that brings together different views on and experiences with seed systems and reflects the breadth of perspectives within CGIAR and beyond. The contributions relate to the major challenges facing seed systems research and development in different contexts and for different crops. One point of agreement among these articles is the need for the development of varieties and the delivery of seeds to be more demand-orientated. This introduction reflects on the implications for CGIAR and affiliated breeding programmes which aim to accelerate varietal uptake and turnover and rely on more effective seed delivery. Here, we outline how the various contributions in this special issue relate to this agenda. We conclude that realism about which farming households can be served by current approaches to seed system development is needed and argue that a wider range of partnerships will be required to broaden the reach of seed systems.


2021 ◽  
Vol 50 (4) ◽  
pp. 406-417
Author(s):  
Conny J.M. Almekinders ◽  
Paul Hebinck ◽  
Wytze Marinus ◽  
Richard D. Kiaka ◽  
Wycliffe W. Waswa

In this article we reflect on the discussions as to whether breeding and seed system development should proceed along its current well established route of developing varieties with a higher agricultural productivity or if the diversity of farmers, their contexts and rationales requires broader approaches. We make use of data from a recently held survey (2018) in West Kenya. The data show that some 80% of the households in the survey planted both local and hybrid maize varieties. The choices that people make about which variety to plant are many. Apart from rainfall, the availability of cash, the promise of a good yield, the presence of projects and programs and the culture of seed also influences these choices. We argue that an inclusive demand-oriented maize breeding and seed system needs to include a range of varieties and seed sources and to develop and support different delivery pathways to fit farmers’ diverse use of seeds and varieties. Our findings also indicate the need for more systematic study of the diversity of farmers’ rationales and the performance of crop varieties. This would provide useful information for all the actors involved.


2021 ◽  
pp. 003072702110538
Author(s):  
Michel Kabirigi

To determine whether a farmer’s accessibility predicts the delivery of extension services, this study used banana Xanthomonas wilt (BXW) disease-management advisory as a typical case with which to collect extension-delivery information from 690 farmers, distinguished by their respective accessibility. Cost–distance analysis was applied to define each farmer’s accessibility. The results revealed that a farmer’s accessibility does not predict extension delivery to that farmer in all forms of the examined extension parameters. Significant factors contributing to the delivery of extension services included BXW incidence and membership in Twigire Muhinzi groups. Given the results of this paper, I argue that the nature of the advisory and the type of farmers’ networks are more predictive factors than physical proximity. The findings of this study support the argument that the group-based extension approach is more effective; therefore, the Twigire Muhinzi initiative is recommended as a suitable model for delivering agricultural advisory services. The absence of a significant association between extension delivery and distance (accessibility) suggests that extension agents do not follow the first-reached, first-served rule but instead follow the problem-solving-based approach.


2021 ◽  
pp. 003072702110582
Author(s):  
Rachel C. Voss ◽  
Jason Donovan ◽  
Pieter Rutsaert ◽  
Jill E. Cairns

With the prioritization of social inclusion in agricultural development, donors and research centers have shown growing interest in gender-intentional varietal development and delivery. Breeding maize varieties that respond to gender-based differences in trait preferences now represents a central objective of maize R&D in the CGIAR and elsewhere. Drawing on literature on gender and maize seed adoption, variety preferences, and seed system constraints, we take stock of knowns and unknowns related to gender-responsive and gender-intentional maize breeding. While recent research on farmers’ variety preferences across crops has yielded insights into gender-based differences, we find that evidence of gender-differentiated preferences for maize varieties remains inconclusive. Ultimately, we identify several research priorities to support gender-intentional maize breeding, including a more nuanced understanding of gender relations in maize production and maize seed decision-making, new and more gender-responsive approaches to measuring farmer preferences and seed demand more broadly, and research to address operational challenges in gender-intentional breeding. We close by identifying some institutional constraints to achieving impact through gender-intentional maize breeding.


2021 ◽  
pp. 003072702110582
Author(s):  
Esmé Stuart ◽  
Asrat Asfaw ◽  
Patrick Adebola ◽  
Norbert Maroya ◽  
Alex Edemodu ◽  
...  

Yam is an important food and cash crop in Nigeria. The seed system is mostly farmer-based and its challenges and opportunities are not well documented. This study reports results of surveys, interviews, focus group discussions and participant observations that describe local practices characterizing yam cultivation and the farmer-based seed system in five states in Nigeria. Our findings show that ware and seed yam are dynamic and highly commercialized goods in Nigeria. There is a high demand for, and a high turn-over of, seed yam. The reasons for the high demand are the low multiplication rate and degeneration of seed yam which lead farmers to frequently acquire fresh seeds and replace varieties, investing significantly in the seed of ware yam. The study found some farmers specializing in seed yam production but less than expected for such a highly commercial crop. The market is the major source for off-farm sourced seed yam, and although completely informal, the seed yam sector is vibrant and well organized. The identification of strategically positioned farmers and traders can offer opportunities and entry points for introduction of new varieties and improved seed production techniques. Building on the existing farmer-based system is a more logical strategy than replacing it with formal structures and legislative regulation.


2021 ◽  
pp. 003072702110563
Author(s):  
Caroline Hambloch ◽  
Jane Kahwai ◽  
John Mugonya

Private sector-based seed system development remains a key development intervention in Sub-Saharan Africa. Seed system interventions promoting the adoption of improved varieties through the private sector generally follow a linear, market-oriented technological adoption logic. A qualitative case study of the sorghum seed system in Kenya, Uganda, and Tanzania demonstrates that this model may not be able to drive the broad-scale adoption of improved sorghum varieties and to generate significant benefits for small sorghum-farming households. The findings suggest that the agro-ecological, social, and political-economic contexts critically determine the role improved varieties and the private sector can play in rural development. Improved sorghum varieties promoted by both the public and private sectors may not suit the needs, preferences and contexts of farming households. Seed companies hold sorghum as an add-on in their portfolio, investing less resources and research into sorghum compared to more profitable crops such as vegetable and maize seeds. Significant political-economic obstacles exist that favor the support of cash crops such as maize and rice, limiting the growth and development of the private sector in the sorghum seed system. We conclude that future interventions should build on approaches that aim to develop more diverse channels of seed delivery in both the formal and informal seed systems, adopt a livelihoods perspective to evaluate the costs, benefits, and risks associated with the adoption of new technologies, and acknowledge that seed system interventions are only one out of a portfolio of interventions to generate rural development.


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