About the RUFORUM 2010 Biennal Conference
"The 2010 RUFORUM Biennial Conference was the second in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholders in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. This record contains an extended abstract accepted under the theme of Natural Resource Management"
Parametric pedotransfer functions for predicting soil water retention in a Ngerengere Subcatchment, Morogoro -Tanzania
Abstract:
The soil water retention-release characteristics (SWRC) are
essential to understand water redistribution in agricultural
systems. However, direct measurements of SWRC are
constrained by costs, scarcity of equipment and time.
Pedotransfer functions (PTFs) are proposed as a simplified
indirect alternative. The gist of this work was to assess the
efficacy of selected parametric PTFs for prediction of SWRC
based on the Van Genuchten parameters (θs, α, n). Lowest
prediction bias was for ès (ME; 0.0574 to 0.1249cm3cm-3).
Greatest prediction bias was for n (ME; -0.659 to 0.8521). The
PTFs showed low reliability (R2 <15%) necessitating
development of locally calibrated PTFs.
Les caractéristiques de rétention-libération de l’eau du
sol(SWRC) sont essentielles pour comprendre la redistribution
de l’eau dans les systèmes agricoles. Cependant, des mesures
directes des SWRC sont contraintes par des coûts, la pénurie
de l’équipement et le temps. Les fonctions de transfert de sol
(PTFs) sont proposées comme alternative indirecte simplifiée.
L’essentiel de ce travail était d’évaluer l’efficacité de PTFs
paramétriques choisies pour la prévision des SWRC basées
sur les paramètres de Van Genuchten (qs, a, n). La plus basse
polarisation de prévision était prévue (ME; 0.0574 à
0.1249cm3cm-3). La plus grande polarisation de prévision était
pour n (ME; -0.659 à 0.8521). Les PTFs ont montré la faible
fiabilité (R2 <15%) nécessitant le développement des PTFs
localement calibrés.
Language:
English
Date of publication:
2010
Country:
Region Focus:
East Africa
University/affiliation:
Collection:
RUFORUM Conferences and Workshops
Agris Subject Categories:
Agrovoc terms:
Additional keywords:
Licence conditions:
Open Access
Access restriction:
Form:
Printed resource
ISSN:
E_ISSN:
Edition:
Extent:
729-733
Notes:
