000			03670nab a22003857a 4500
001			G89962
003			MX-TxCIM
005			20231114203947.0
008			210614s2007 xxk|||p|op||| 00| 0 eng d
022			_a0021-8596
022			_a1469-5146 (Online)
024	8		_ahttps://doi.org/10.1017/S0021859607006995
040			_aMX-TxCIM
041			_aeng
090			_aCIS-5033
100	1		_aOrtiz-Monasterio, I. _gFormerly Sustainable Intensification Program _gFormerly Integrated Development Program _gFormerly Sustainable Agrifood Systems _8INT1421 _9827
245	1	0	_aReduced nitrogen and improved farm income for irrigated spring wheat in the Yaqui Valley, Mexico, using sensor based nitrogen management
260			_aUnited Kingdom : _bCambridge University Press, _c2007.
340			_aComputer File|Printed
500			_aPaper presented at International Workshop on Increasing Wheat Yield Potential, CIMMYT, Obregon, Mexico, 20-24 March 2006
520			_aWheat nitrogen-use efficiency in the Yaqui Valley has been estimated at about 0.31. The nitrogen that is not recovered by the crop has important environmental costs that have regional and global consequences. In addition, these nitrogen losses represent an important reduction in farm income. The objective of the present work was to validate a technology that includes the use of N-rich strips together with the GreenSeekerTM sensor and a crop algorithm in farmers’ fields with the ultimate goal of improving nitrogen-use efficiency through site-specific nitrogen management in irrigated spring wheat. During the wheat crop cycle 2002/03 and 2003/04, 13 validation experiments of c. 1 ha each were established in farmers’ fields in the Yaqui Valley. After the validation phase, during the wheat crop cycle 2005/06, eight technology transfer trials were established in farmers’ fields; these had on an average an area of 10 ha each. Both the validation and technology transfer trials compared the farmers’ conventional nitrogen management use v. the use of the N-rich strip together with the Green SeekerTM sensor and a crop algorithm to derive N recommendations for each individual field. The results of the validation trials showed that on an average over all locations, farmers were able to save 69 kg N/ha, without any yield reduction. At the price of US$0.9 per unit of N in the valley when these experiments were established, this represented savings to the farmers of US$62/ha. The technology transfer trials demonstrated that, in large commercial areas with an average size of 10 ha, farmers could improve their farm income by US$50/ha, when using sensor based N management. The combination of the N-rich strip, together with the use of the sensor and a crop algorithm to interpret the results from the sensor, allowed farmers to obtain significant savings in N use and thus in farm profits. Farm income was increased by US$56/ha, when averaged over all trials in all years.
536			_aConservation Agriculture Program
546			_aText in English
594			_aINT1421
650		7	_2AGROVOC _91310 _aWheat
650		7	_2AGROVOC _92912 _aNitrogen
650		7	_2AGROVOC _911475 _aNutrient use efficiency
650		7	_2AGROVOC _98629 _aField Experimentation
650		7	_2AGROVOC _96415 _aTechnology transfer
650		7	_2AGROVOC _91088 _aEconomic analysis
700			_aRaun, W.R. _97476
773	0		_tJournal of Agricultural Science, Cambridge _n634787 _gv. 145, no. 3, p. 215-222 _dUnited Kingdom : Cambridge University Press, 2007. _wG444500 _x0021-8596
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/418
942			_cJA _2ddc _n0
999			_c26759 _d26759