Start, end and dry spells of the growing season in semi-arid southern Zimbabwe

Mupangwa, W and Walker, S and Twomlow, S J (2011) Start, end and dry spells of the growing season in semi-arid southern Zimbabwe. Journal of Arid Environments, 75 (11). pp. 1097-1104. ISSN 0140-1963

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Abstract

Smallholder agriculture in semi-arid Zimbabwe is dependent on the seasonal characteristics of rainfall. The determination of start, end and length of the growing season, and the pattern of dry spells during the season is useful information for planning land preparation and planting activities. This study was designed to assess whether there has been any changes in the start, end and length of growing season and the pattern of 14 and 21 day dry spells during the season. Daily rainfall data were collected from five meteorological stations located in southern Zimbabwe. Results indicated that no significant changes in the start, end and subsequent length of growing season occurred over the past 50–74 years. There was no significant change in the number of wet days per season over the period reviewed. There is a high probability of 14 and 21 day dry spells during the peak rainfall months. The relationship between start and end of growing season is stronger as aridity increases. We conclude that growing seasons have not changed significantly over the past 50–74 years in southern Zimbabwe. As smallholder agriculture continues to be affected by dry spells and droughts, there is scope in exploring rainwater management technologies in rainfed cropping systems

Item Type: Article
Divisions: UNSPECIFIED
CRPS: UNSPECIFIED
Uncontrolled Keywords: Daily rainfall; Rainwater management; Smallholder agriculture; Wet days
Subjects: Mandate crops > Sorghum
Others > Maize
Others > Climate change
Depositing User: Ms K Syamalamba
Date Deposited: 18 Mar 2014 06:19
Last Modified: 18 Mar 2014 06:19
URI: http://oar.icrisat.org/id/eprint/7643
Official URL: http://dx.doi.org/10.1016/j.jaridenv.2011.05.011
Projects: WaterNet Challenge Program Project 17
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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