| 000 | 03951nab a22005177a 4500 | ||
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| 999 |
_c56844 _d56836 |
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| 001 | 56844 | ||
| 003 | MX-TxCIM | ||
| 005 | 20240919020914.0 | ||
| 008 | 150422s2015 xxu|||po p||| 00| 0 eng d | ||
| 022 | _a1385-2256 | ||
| 022 | _a1573-1618 (Online) | ||
| 024 | 8 | _ahttps://doi.org/10.1007/s11119-015-9389-6 | |
| 040 | _aMX-TxCIM | ||
| 041 | _aeng | ||
| 100 | 1 |
_aSingh, B. _gFormerly Sustainable Intensification Program _8I1705951 _9793 |
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| 245 | 1 | 0 | _aSite-specific fertilizer nitrogen management in irrigated transplanted rice (Oryza sativa) using an optical sensor |
| 260 |
_aNew York : _bSpringer, _c2015. |
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| 500 | _aPeer review | ||
| 520 | _aBlanket fertilizer nitrogen (N) recommendations for large irrigated transplanted rice tracts lead to low N use-efficiency (NUE) due to field-to-field variability in soil N supply and seasonal variability in yield. To achieve high NUE, a fertilizer N management strategy based on visible and near-infrared spectral response from plant canopies using a Green- SeekerTM optical sensor was evaluated. Seven field experiments were conducted during 2005–2007 at two locations in the Indo-Gangetic plains of South Asia to define relationships between in-season sensor measurements at panicle initiation (PI) stage and up to 2 weeks later, and yield of rice. During 2006–2010, seven field experiments were conducted to assess the sensor-based N management strategy and to work out the prescriptive N management to be followed prior to applying sensor-guided fertilizer dose. During 2010 and 2011, the sensorbased N management strategy was evaluated versus farmers’ fertilizer practice at 19 on-farm locations. Relationships with R2 values 0.51 (n = 131), 0.45 (n = 74) and 0.49 (n = 131), respectively, were observed between in-season sensor-based estimates of yield at 42 (PI stage), 49 and 56 days after transplanting of rice and actual grain yield of rice. Applications of 30 kg N ha-1 at transplanting and 45 kg N ha-1 at active tillering stage were found to be the appropriate prescriptive strategy before applying the GreenSeeker-guided dose at PI stage. Sensor-guided N management resulted in similar grain yields as the blanket rate farmer practice, but with reduced N rates, i.e. greater recovery efficiency (by 5.5–21.7 %) and agronomic efficiency [by 4.7–11.7 kg grain (kg N applied)-1]. This study revealed that high yields coupled with high NUE in transplanted rice can be achieved by replacing blanket fertilizer recommendation by an optical sensor-based N management strategy consisting of applying a moderate amount of fertilizerNat transplanting and enough fertilizerNto meet the high N demand during the period between active tillering and PI before applying a sensorguided fertilizer N dose at PI stage of rice. | ||
| 536 | _aConservation Agriculture Program | ||
| 546 | _aText in English | ||
| 591 | _bCIMMYT Informa No. 1931 | ||
| 594 | _aINT3072 | ||
| 650 | 7 |
_aRice _gAGROVOC _2 _91243 |
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| 650 | 7 |
_aTransplanting _91292 _2AGROVOC |
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| 650 | 7 |
_91190 _aNitrogen fertilizers _2AGROVOC |
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| 700 | 1 |
_aSingh, V. _920010 |
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| 700 | 1 |
_aPurba, J. _9262 |
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| 700 | 1 |
_aSharma, R.K. _gFormerly Global Wheat Program _8INT3065 _9888 |
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| 700 | 1 |
_aJat, M.L. _gFormerly Sustainable Intensification Program _gFormerly Sustainable Agrifood Systems _8INT3072 _9889 |
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| 700 | 1 |
_aSingh, Y. _9700 |
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| 700 | 1 |
_aThind, H.S. _9336 |
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| 700 | 1 |
_aGupta, R.K. _9515 |
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| 700 | 1 |
_aChaudhary, O.P. _945 |
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| 700 | 1 |
_aChandna, P. _943 |
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| 700 | 1 |
_aKhurana, H.S. _9157 |
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| 700 | 1 |
_aKumar, A. _9165 |
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| 700 | 1 |
_aSingh, J. _9310 |
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| 700 | 1 |
_aUppal, H.S. _9346 |
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| 700 | 1 |
_aUppal, R.K. _9347 |
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| 700 | 1 |
_aVashistha, M. _9353 |
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| 700 | 1 |
_aGupta, R. _9189 |
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| 773 | 0 |
_wu99020 _tPrecision Agriculture _gv. 16, no. 1, p. 455-475 _dNew York : Springer, 2015. _x1385-2256 |
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| 856 | 4 |
_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/143 |
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| 942 |
_2ddc _cJA _n0 |
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