000			02808nam a22004337a 4500
001			G70397
003			MX-TxCIM
005			20211006082148.0
008			121211s ||||f| 0 p|p||0|| |
020			_a92-9146-058-3
040			_aMX-TxCIM
072		0	_aF01
072		0	_aF04
090			_aLook under series title
100	1		_aAsefa Taa _uRegional Wheat Workshop for Eastern, Central and Southern Africa, 10; University of Stellenbosch, South Africa; 14-18 Sep 1998 _9416
110	2		_aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Addis Ababa (Ethiopia)
245	0	0	_aOn-farm evaluation of fertilizer response of two recently-released bread wheat varieties in Ethiopia
260			_aAddis Ababa (Ethiopia) _bCIMMYT : _c1999
340			_aPrinted
520			_aMulti-location on-farm fertilizer trials were conducted for two seasons (1995 and 1996) in two sets (factorial N by P rate trials and N rate by application timing trials) in the highlands of Ethiopia to examine the fertilizer response of two recently released bread wheat cultivars. The results exhibited differential crop response to applied N and P in the various agro-ecological zones. Wheat grain yield response surfaces demonstrated that the semi-dwarf cultivar Qubsa was markedly superior to the tall cultivar Mitike in terms of grain yield across all zones. However, under a high level of bromegrass infestation, the response curves for the two cultivars were similar. The %N levels in the grain and straw of Mitike were higher than the corresponding N contents of Qubsa. However, Qubsa exhibited higher grain N uptake (GNU) and total N uptake (TNU) levels than Mitike due to its higher grain yield levels across all N rates. In terms of GNU, Mitike with 123 kg N/ha resulted in the same level of GNU as Qubsa at O N. The results of the N rate by application timing trial showed that the main effects of N rate and variety on grain yield were significant. Mitike was lower yielding than Qubsa across both locations and all N rates. There was no consistent response to N application timing in the present study, but split application tended to enhance grain yield at some sites.
546			_aEnglish
591			_a0007|AGRIS 0101|R99-00CIMPU|AL-Wheat Program
593			_aJose Juan Caballero
595			_aCPC
650	1	0	_aEthiopia
650	1	0	_aFertilizer application _91110
650	1	7	_aFertilizers _gAGROVOC _2 _91111
650	1	0	_aNitrogen
650	1	0	_aPlant production _91212
650	1	7	_aVarieties _gAGROVOC _2 _91303
653	0		_aCIMMYT
650	1	7	_aTriticum _gAGROVOC _2 _91295
650	1	0	_91296 _aTriticum aestivum _gAGROVOC
650	1	0	_91313 _aYields _gAGROVOC
700	1		_aDuga Debele, _ecoaut.
700	1		_aYesuf Assen, _ecoaut.
700	1		_9724 _aTanner, D.G. _ecoaut.
942			_cPRO
999			_c4489 _d4489