Betserai Isaac Nyoka

Dr. Betserai Isaac Nyoka


Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 November 2014 in Small-scale Forestry
Verified
Journal Article
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BNBetserai Isaac Nyoka
Betserai Isaac Nyoka
JRJames Roshetko
James Roshetko
RJRamni Jamnadass
Ramni Jamnadass
JMJonathan Muriuki
Jonathan Muriuki
AKAntoine Kalinganire
Antoine Kalinganire
JCJonathan Cornelius
Jonathan Cornelius

26 February 2018 in Forests, Trees and Livelihoods
Verified
Journal Article
Closed access
BNBetserai Isaac Nyoka
Betserai Isaac Nyoka
RKR. Kamanga
R. Kamanga
JNJ. Njoloma
J. Njoloma
RJR. Jamnadass
R. Jamnadass
SMS. Mng’omba
S. Mng’omba
SMS. Muwanje
S. Muwanje
Survival of planted trees in Malawi is very low and this is attributed to many factors including the use of poor quality tree seedlings. A survey was conducted to assess the quality of tree seedlings produced by various nurseries. The survey covered 55 nurseries in four districts in central Malawi comprising 18 private, 26 communal and 11 institutional nurseries. A total of 1,500 tree seedlings were assessed for morphological attributes i.e. root collar diameter (RCD), height, root and shoot weight, shoot-to-root ratio (S:R), sturdiness quotient, Dickson’s Quality Index (DQI) and root deformity. Differences between the three nursery types were significant (p < 0.05) for some of the parameters. Overall, 33%, 58% and 67% of assessed seedlings in communal, institutional and private nurseries, respectively, had the recommended S:R ratio of less than 2, while for sturdiness quotient, 8%, 67%, and 58%, respectively, of the seedlings had less than the recommended threshold value of 6. A similar pattern was observed for RCD and DQI. Prevalence of root deformities was highest in institutional nurseries (47.5%), followed by private (45.5%) and communal nurseries had the lowest (42.6%). Given that all three nursery types have apparent, but sometimes different seedling quality issues, building knowledge and technical capacity is needed across all the nursery operators.

31 December 2014 in Agroforestry Systems
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Journal Article
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BNBetserai Isaac Nyoka
Betserai Isaac Nyoka
TCT. Chanyenga
T. Chanyenga
SMS. A. Mng’oMba
S. A. Mng’oMba
FAF. K. Akinnifesi
F. K. Akinnifesi
WSW. Sagona
W. Sagona

16 February 2011 in Small-scale Forestry
Verified
Journal Article
Closed access
PDF file
BNBetserai Isaac Nyoka
Betserai Isaac Nyoka
SMSimon A. Mng’omba
Simon A. Mng’omba
FAFestus K. Akinnifesi
Festus K. Akinnifesi
OAOluyede C. Ajayi
Oluyede C. Ajayi
Gudeta SileshiGudeta Sileshi
Gudeta Sileshi
RJRamni Jamnadass
Ramni Jamnadass

10 April 2011 in Agroforestry Systems
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Journal Article
Closed access
PDF file
BNBetserai Isaac Nyoka
Betserai Isaac Nyoka
OAO. C. Ajayi
O. C. Ajayi
FAF. K. Akinnifesi
F. K. Akinnifesi
TCT. Chanyenga
T. Chanyenga
SMS. A. Mng’oMba
S. A. Mng’oMba
TMT. Madhibha
T. Madhibha

1 August 2012 in Agriculture, Ecosystems & Environment
Verified
Journal Article
Closed access
BNBetserai Isaac Nyoka
Betserai Isaac Nyoka
ASA.J. Simons
A.J. Simons
FAF.K. Akinnifesi
F.K. Akinnifesi