scholarly journals Potential role of Conservation Agriculture in South Africa for carbon sequestration for climate mitigation : A provisional research agenda

2020 ◽  
Author(s):  
Saskia Keesstra ◽  
◽  
Angelinus Franke ◽  
Henk Wösten ◽  
Nester Mashingaidze ◽  
...  

2016 ◽  
Vol 12 (9) ◽  
pp. 20160509 ◽  
Author(s):  
S. D. Rundle ◽  
J. I. Spicer

There is a current surge of research interest in the potential role of developmental plasticity in adaptation and evolution. Here we make a case that some of this research effort should explore the adaptive significance of heterokairy, a specific type of plasticity that describes environmentally driven, altered timing of development within a species. This emphasis seems warranted given the pervasive occurrence of heterochrony, altered developmental timing between species, in evolution. We briefly review studies investigating heterochrony within an adaptive context across animal taxa, including examples that explore links between heterokairy and heterochrony. We then outline how sequence heterokairy could be included within the research agenda for developmental plasticity. We suggest that the study of heterokairy may be particularly pertinent in (i) determining the importance of non-adaptive plasticity, and (ii) embedding concepts from comparative embryology such as developmental modularity and disassociation within a developmental plasticity framework.



2013 ◽  
Vol 29 (3) ◽  
pp. 277-290 ◽  
Author(s):  
Bridget Bwalya Umar

AbstractDifferent theories have been posited that try to explain the decision-making process of smallholders especially regarding the adoption of new technologies or new agricultural techniques. The objective of this paper is to review and re-assess the dominant household production theories to explain the decision making of smallholders practicing conservation agriculture (CA) in the southern, eastern, and central provinces of Zambia. It also discusses the potential role of CA toward economic development. It finds that the CA smallholders studied did not aim to maximize profits but tried to secure household consumption from their own production before any other considerations in risky and uncertain environments. Their response to economic incentives was contingent on minimizing risks associated with securing a minimum level of livelihood and investing into local forms of insurance. This paper concludes that the ability for CA to contribute to rural livelihoods and economic development would depend on how adequately the factors that hinder smallholder agricultural development in general are addressed.



2019 ◽  
Vol 11 (4) ◽  
pp. 044301
Author(s):  
Temitope Raphael Ayodele ◽  
Josiah Lange Munda






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