Farm Input Market System in Western Kenya: Constraints, Opportunities, and Policy Implications

Author(s):  
J. Chianu ◽  
F. Mairura ◽  
I. Ekise
Health Policy ◽  
2001 ◽  
Vol 58 (1) ◽  
pp. 83-96 ◽  
Author(s):  
Erick Otieno Nyambedha ◽  
Simiyu Wandibba ◽  
Jens Aagaard-Hansen

2006 ◽  
Vol 78 (4) ◽  
pp. 781-790 ◽  
Author(s):  
Bashir Jama ◽  
Peter Van Straaten

Phosphorus deficiency affects around 80% of the acid soils of western Kenya, but fertilizer use is limited due to high prices. This paper explores the potential of local phosphate rocks (PR) as a remedy within the context on an integrated soil fertility management approach. A promising phosphate rock is Minjingu PR (MPR, Tanzania), a sedimentary/biogenic deposit which contains about 13% total P and 3% neutral ammonium citrate (NAC) soluble P. On-farm trials in P-deficient soils in western Kenya demonstrate MPR to be as effective as triple superphosphate (TSP, 20% P) at equal P rates. The benefits are most pronounced with the integration of agroforestry technologies that improve soil fertility. Besides Minjingu PR, Busumbu PR from Uganda (BPR) is potentially another source of P. It is typical of the abundant but unreactive igneous PRs in eastern, central and southern Africa. Agronomic performance of BPR is poorer, though its lower cost and location near to P-deficient areas in western Kenya make it attractive in some situations. The policy implications of these findings are discussed further in the paper.


2000 ◽  
Vol 55 (7) ◽  
pp. 740-749 ◽  
Author(s):  
Ralph Swindle ◽  
Kenneth Heller ◽  
Bernice Pescosolido ◽  
Saeko Kikuzawa

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