SUSTAINABILITY OF RAIN-FED AGRICULTURE IN BOTSWANA: A CASE STUDY IN THE PANDAMATENGA PLAINS

B Alemaw, T R Chaoka, Otlogetswe Totolo

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Abstract

1 Telephone: (267)-3552-539 Fax: (267)-3185-097 Email: alemaw@mopipi.ub.bw Abstract: The agriculture economic sector of Botswana is limited mainly to range resources-based livestock and pockets of arable farming based on rainfall and limited irrigated agriculture at several places. In this study agricultural sustainability of rain-fed agriculture is investigated in Botswana by considering the Pandamatenga plains as a case study. Daily soil moisture regimes with respect to crop growth cycle were modelled using a water balance model based on 42 years of daily hydro climatic inputs and corresponding simulated components of soil moisture, evaporation, surface runoff, and deep percolation. Using a sustainability criteria on crop water requirement and soil moisture availability during the cropping periods, it was found that rain-fed agriculture of maize, sunflower, and sorghum crops remains sustainable (with some degree of sustainability). By simulating the corresponding runoff, we have also explored that more water harvesting opportunities exist in order to manage rainfall excesses effectively in this vast agriculturally potential region of Botswana.
Original languageEnglish
JournalJournal of physics and chemistry of the earth
Publication statusPublished - Jun 18 2018

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sustainability
agriculture
crop
soil moisture
runoff
arable farming
rainfall
alternative agriculture
sorghum
water budget
cropping practice
livestock
evaporation
maize
water
plain
rain
resource
soil moisture regime
economic sector

Cite this

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title = "SUSTAINABILITY OF RAIN-FED AGRICULTURE IN BOTSWANA: A CASE STUDY IN THE PANDAMATENGA PLAINS",
abstract = "1 Telephone: (267)-3552-539 Fax: (267)-3185-097 Email: alemaw@mopipi.ub.bw Abstract: The agriculture economic sector of Botswana is limited mainly to range resources-based livestock and pockets of arable farming based on rainfall and limited irrigated agriculture at several places. In this study agricultural sustainability of rain-fed agriculture is investigated in Botswana by considering the Pandamatenga plains as a case study. Daily soil moisture regimes with respect to crop growth cycle were modelled using a water balance model based on 42 years of daily hydro climatic inputs and corresponding simulated components of soil moisture, evaporation, surface runoff, and deep percolation. Using a sustainability criteria on crop water requirement and soil moisture availability during the cropping periods, it was found that rain-fed agriculture of maize, sunflower, and sorghum crops remains sustainable (with some degree of sustainability). By simulating the corresponding runoff, we have also explored that more water harvesting opportunities exist in order to manage rainfall excesses effectively in this vast agriculturally potential region of Botswana.",
author = "B Alemaw and {R Chaoka}, T and Otlogetswe Totolo",
year = "2018",
month = "6",
day = "18",
language = "English",
journal = "Journal of physics and chemistry of the earth",

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T1 - SUSTAINABILITY OF RAIN-FED AGRICULTURE IN BOTSWANA: A CASE STUDY IN THE PANDAMATENGA PLAINS

AU - Alemaw, B

AU - R Chaoka, T

AU - Totolo, Otlogetswe

PY - 2018/6/18

Y1 - 2018/6/18

N2 - 1 Telephone: (267)-3552-539 Fax: (267)-3185-097 Email: alemaw@mopipi.ub.bw Abstract: The agriculture economic sector of Botswana is limited mainly to range resources-based livestock and pockets of arable farming based on rainfall and limited irrigated agriculture at several places. In this study agricultural sustainability of rain-fed agriculture is investigated in Botswana by considering the Pandamatenga plains as a case study. Daily soil moisture regimes with respect to crop growth cycle were modelled using a water balance model based on 42 years of daily hydro climatic inputs and corresponding simulated components of soil moisture, evaporation, surface runoff, and deep percolation. Using a sustainability criteria on crop water requirement and soil moisture availability during the cropping periods, it was found that rain-fed agriculture of maize, sunflower, and sorghum crops remains sustainable (with some degree of sustainability). By simulating the corresponding runoff, we have also explored that more water harvesting opportunities exist in order to manage rainfall excesses effectively in this vast agriculturally potential region of Botswana.

AB - 1 Telephone: (267)-3552-539 Fax: (267)-3185-097 Email: alemaw@mopipi.ub.bw Abstract: The agriculture economic sector of Botswana is limited mainly to range resources-based livestock and pockets of arable farming based on rainfall and limited irrigated agriculture at several places. In this study agricultural sustainability of rain-fed agriculture is investigated in Botswana by considering the Pandamatenga plains as a case study. Daily soil moisture regimes with respect to crop growth cycle were modelled using a water balance model based on 42 years of daily hydro climatic inputs and corresponding simulated components of soil moisture, evaporation, surface runoff, and deep percolation. Using a sustainability criteria on crop water requirement and soil moisture availability during the cropping periods, it was found that rain-fed agriculture of maize, sunflower, and sorghum crops remains sustainable (with some degree of sustainability). By simulating the corresponding runoff, we have also explored that more water harvesting opportunities exist in order to manage rainfall excesses effectively in this vast agriculturally potential region of Botswana.

M3 - Article

JO - Journal of physics and chemistry of the earth

JF - Journal of physics and chemistry of the earth

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