000			03231nam a22004457a 4500
001			G70402
003			MX-TxCIM
005			20211006081058.0
008			121211s ||||f| 0 p|p||0|| |
020			_a92-9146-058-3
040			_aMX-TxCIM
072		0	_aF01
090			_aLook under series title
110	2		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Addis Ababa (Ethiopia)
100	1		_9876 _aAmsal Tesfaye Tarekegne _gGlobal Maize Program _8INT2937 _uRegional Wheat Workshop for Eastern, Central and Southern Africa, 10; University of Stellenbosch, South Africa; 14-18 Sep 1998
245	0	0	_aA study of variety by management interaction in bread wheat varieties released in Ethiopia
260			_aAddis Ababa (Ethiopia) _bCIMMYT : _c1999
340			_aPrinted
520			_aBread wheat (Triticum aestivum L.) varieties released in Ethiopia have been observed to differ in response to crop and pest management inputs. Field trials were conducted during the 1995 and 1996 cropping seasons at three locations in the central highlands of Ethiopia to determine the agronomic and economic performance of adapted bread wheat varieties under contrasting management systems. The trials were implemented in a split plot design with eight wheat varieties (V) arranged as subplots within three (Low, Standard, and High) management systems (M). The main effects of M and V were significant on all crop parameters at all three locations when combined over years. Averaged over locations and years, the application of higher levels of crop management inputs increased grain yields by 103% for standard and 160% for high management systems relative to the low management system. MxV interaction was significant for a1l crop parameters considered except stand count and spike density at one or two locations. The grain yield responses of the four tall varieties to increased input levels appeared to be minimal. The semi-dwarf varieties Dashen and HAR 710 exhibited dramatic enhancements of grain yield as crop input levels were increased. The semi-dwarf varieties HAR 604 and HAR 1685 exhibited high productivity across a1l management systems, producing the highest marginal benefits in a1l three management systems and the highest marginal rates of return for increased input levels. It is concluded that the profitability of wheat production in the central highlands of Ethiopia can be increased by adopting improved crop management practices in conjunction with input-responsive and stable bread wheat varieties.
536			_aGlobal Maize Program
546			_aEnglish
591			_a0007|AGRIS 0101|R99-00CIMPU|AL-Wheat Program
593			_aJose Juan Caballero
594			_aINT2937
595			_aCPC
650	1	7	_aAgronomic characters _gAGROVOC _2 _91008
650	1	7	_aCrop management _gAGROVOC _2 _91061
650	1	0	_aCropping patterns _91067
650	1	0	_aEthiopia
650	1	0	_aHighlands _91148
650	1	0	_aPerformance
650	1	0	_aTrials
650	1	7	_aVarieties _gAGROVOC _2 _91303
653	0		_aCIMMYT
650	1	0	_91296 _aTriticum aestivum _gAGROVOC
700	1		_aChanyallew Mandefro, _ecoaut.
700	1		_aTaye Tessema, _ecoaut. _9725
700	1		_9724 _aTanner, D.G. _ecoaut.
942			_cPRO
999			_c4494 _d4494