Setting out to Evaluate Rain Water Harvesting (RWH) for Crop production at Botswana College of Agriculture

This report is an account of an on-going study being carried out at Botswana College of Agriculture Farm to characterise soil surface conditions on runoff generation of micro-catchment RWH systems, and to appraise these micro-catchment RWH systems on crop performance. The characterisation undertaking involved a replicated runoff yield trial of two factors: size of catchment at three levels (5 x 5m, 5 x 10m and 5 x 20m) and four common soil surface conditions [ploughed surface (PS), harrowed surface (HS), managed crop (PM) and natural vegetation (NV)]. Trenching (for the installation of the runoff collection system at the bottom of each plot) was carried out. The appraisal of micro-catchment RWH systems on crop performance involved a replicated trial of two factors: catchment size at three levels and tillage treatment. Measurement of maize growth parameters and installation of runoff collection system which commenced in March 2012 were halted in mid-April 2012 due to an abrupt end of the rain season. No significant rain had fallen to initiate surface runoff for quantification. The study continues.
Ce rapport entre en compte d’une étude en cours menée au sein de la ferme du Collège de sciences agronomiques au Botswana pour caractériser les conditions de surface du sol sur la production d’eaux de ruissellement des systèmes CEP dans le micro-bassin versant, et pour évaluer ces systèmes de CEP dans le micro-bassin versant sur le rendement des cultures. L’entreprise de la caractérisation a impliqué un essai répliqué de rendement de ruissellement de deux facteurs: la taille du bassin versant à trois niveaux (5 x 5m, 5 x 10m et 5 x 20m) et quatre conditions communes de surface du sol [surface labourée (PS), surface hersée (HS), cultures menées (PM) et végétation naturelle (NV)]. Le tranchage (pour l’installation du systèmede collecte des eaux de ruissellement au fond de chaque parcelle) a été réalisé. L’évaluation des systèmes de CEP dans le microbassin sur le rendement des cultures a impliqué un essai répliqué de deux facteurs: la taille du bassin versant à trois niveaux et le traitement dû au labourage. La mesure des paramètres de croissance du maïs et l’installation du système de collecte des eaux de ruissellement qui ont débuté en Mars 2012, ont été arrêtés en mi-Avril 2012 suite à une brusque interruption de la saison des pluies. Aucune pluie significative n’est tombée afin d’amorcer le ruissellement de surface pour la quantification. L’étude se poursuit.
Extended abstracts submitted under Enhancing Natural Resource Management
Date of publication: 
Region Focus: 
Southern Africa
RUFORUM Conferences and Workshops
Licence conditions: 
Open Access
Access restriction: 
Printed resource

The 2012 RUFORUM Biennial Conference is the third 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 stakeholers 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. The third Biennial Conference was attended by 657 participants.This record contains an extended abstract accepted under the theme of Enhancing Natural Resource Management