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Trends of Productivity of Water in Rainfed Agriculture: Historical Perspective

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dc.contributor.author Igbadun, Henry E.
dc.contributor.author Mahoo, Henry F.
dc.contributor.author Tarimo, Andrew K.P.R.
dc.contributor.author Salim, Baanda A.
dc.date.accessioned 2009-10-15T16:48:40Z
dc.date.available 2009-10-15T16:48:40Z
dc.date.issued 2005 en_US
dc.identifier.uri https://hdl.handle.net/10535/5039
dc.description.abstract "In Sub-Sahara Africa, rain-fed agriculture is the dominant source of food production. It is likely going to remain so for the next foreseeable future. However, yields from rain-fed agriculture are often very low. But there is an enormous opportunity to raise crop yield of rain-fed agriculture especially by focusing on the aspect of increasing productivity of water. In order to formulate and adopt appropriate and adequate options for increasing productivity of water in rain-fed agriculture, there is a need to have an historical hindsight to the trend of productivity of water in rain-fed agriculture. In this paper, a historical analysis of the trend of productivity of water (PW) for five crops cultivated under rain-fed condition in Mbarali District, Mbeya Region, Tanzania, was carried out using secondary data. The crops include: maize, sorghum, beans, potato, and groundnut. The PW(rainfall) for maize, sorghum, potato, beans, and groundnut had peak values of 0.49kg/m3 in 1993/94, 0.47 kg/m3 in 1994/5, 3.06kg/m3 in 1993/94, 0.33kg/m3 in 1996/97, and 0.20kg/m3 in 1994/95 cropping seasons, respectively. Evapotranspiration deficit occasioned by either mid cropping-season dry spell or early cessation of rainfall and low rainfall utilization efficiency are the primary drivers of PW in rainfed agriculture in the area. Other factors that are usually put forward by agricultural stakeholders in the region, which include poor soil nutrient and lack of proper crop management, are secondary and could be considered as spill over effects from these primary drivers of PW." en_US
dc.language English en_US
dc.subject agriculture en_US
dc.subject groundwater en_US
dc.subject water resources en_US
dc.subject productivity en_US
dc.subject history en_US
dc.subject stakeholders en_US
dc.subject crops en_US
dc.title Trends of Productivity of Water in Rainfed Agriculture: Historical Perspective en_US
dc.type Conference Paper en_US
dc.type.published unpublished en_US
dc.type.methodology Case Study en_US
dc.publisher.workingpaperseries Comprehensive Assessment of Water Management in Agriculture, Sweden en_US
dc.subject.sector Agriculture en_US
dc.subject.sector Water Resource & Irrigation en_US
dc.identifier.citationconference East African River Basin Conference en_US
dc.identifier.citationconfdates March 7-9 en_US
dc.identifier.citationconfloc Morogoro, Tanzania en_US

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