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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 408961
Title Assessment of strip tillage systems for maize production in semi-arid Ethiopia: effects on grain yield, water balance and water productivity
Author(s) Temesgen, M.; Savenije, H.H.G.; Rockström, J.; Hoogmoed, W.B.
Source Physics and Chemistry of the Earth 47-48 (2012). - ISSN 1474-7065 - p. 156 - 165.
Department(s) ATV Farm Technology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) hydraulic-properties - soil - evapotranspiration - generation - drought - area
Abstract The Maresha, the traditional Ethiopian plow, requires repeated cross-plowing which causes increased surface runoff, less infiltration and hence lower water availability to crops. The main reasons for increased surface runoff and reduced infiltration are plowing along the slope and the formation of a plow pan at shallow depths. Conservation tillage is seen as a way to alleviate these problems. The widely advocated zero-tillage, however, is not feasible for smallholder farmers in semi-arid regions of Ethiopia because of difficulties in maintaining adequate soil cover, the practice of communal grazing, and high costs of herbicides. Strip tillage systems, on the other hand, may offer a solution. This study was initiated to test strip tillage systems and to evaluate the impacts of new tillage systems on the water balance and grain yields of maize. Experiments have been conducted in a semi-arid area called Melkawoba in the central Rift Valley of Ethiopia during 2003-2005. Strip tillage systems involved cultivation along planting lines at a spacing of 0.75 m using the Maresha plow followed by subsoiling along the same lines (STS) or without subsoiling (ST). Results have been compared with traditional tillage involving 3 to 4 overpasses with the Maresha plow (CONV). Soil moisture has been monitored to a depth of 1.8 m using a Time Domain Reflectometer (TDR) while surface runoff has been measured using a specially designed rectangular trough installed at the bottom of each plot. STS resulted in the least surface runoff (Qs=18 mm-season-1) and the highest grain yields (Y=2130 kg-ha-1) followed by ST (Qs=26 mm-season-1, Y=1840 kg-ha-1) and CONV (Qs=43 mm-season-1, Y=1720 kg-ha-1) provided sowing was carried out within a week after subsoiling. Thus, STS resulted in the highest water productivity, WP=0.60 kg-m-3, followed by ST (WP=0.52 kg-m-3) and CONV (WP=0.48 kg-m-3). The main conclusion of the paper is that even in dry areas reasonable yields can be obtained provided moisture conservation in the root zone is guaranteed. In this regard subsoiling is essential. Moreover, it is concluded that the time between subsoiling and planting is a key factor and should not exceed one week
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