| Autor: |
Wim Cornelis, Mitiku Haile, Fekadu Getnet, Dirk Raes, Bram Govaerts, Hans Bauer, Kassa Amare, Jan Nyssen, Jozef Deckers, Tesfay Araya |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Field Crops Research. 132:53-62 |
| ISSN: |
0378-4290 |
| DOI: |
10.1016/j.fcr.2011.12.009 |
| Popis: |
In the northern Ethiopian highlands, croplands yield extremely high volumes of storm runoff and are the major contributor to sediment load in the rivers. A medium-term tillage experiment was carried out (2005–2010) on a Vertisol to quantify changes in runoff, soil loss and crop yield due to Conservation agriculture (CA) in the sub-humid May Zegzeg catchment. A randomized complete block design with 3 replications on permanent plots of 5 m by 14 m was used for three tillage treatments, (i) derdero + (DER+), permanent raised beds with 30% standing crop residue retention and no-tillage on the top of the bed, (ii) terwah+ (TER+), ploughed once at sowing with 30% standing crop residue retention and furrows made at 1.5 m interval, and (iii) conventional tillage (CT) with a minimum of three tillage operations and removal of crop residues. Tillage operations in the three treatments were done using the local ard plough mahresha. Local crop rotation practices followed during the six years sequentially from the first to the sixth year included wheat-grass pea-wheat- hanfets (wheat and barley sown together)-grass pea-wheat. Glyphosate was sprayed starting from the third year (2007) at 2 L/ha before planting to control pre-emergent weed in DER+ and TER+. Runoff and soil loss were measured in collector trenches at the lower end of each plot. Soil organic matter was determined at two depths (0–15 cm) and (15–30 cm). Local farmers evaluated crop stands. Significantly different ( p |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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