Yield Response of Wheat and Canola to a Topographically Based Variable Rate Fertilization Program in Saskatchewan

Pennock, D.J.; Walley, F.L.; Solohub, M.; Hnatowich, G.

doi:10.2134/1999.precisionagproc4.c76

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Variation in the GPC decreased with the increasing rate of N fertilization in our study. Pennock et al [70] detected the same reaction for spring wheat at a large scale.…”

Section: Small-scale Variability Of Gpc As Affected By Tillage Intensity and Rate Of N Fertilizationmentioning

confidence: 68%

“…The size of fertilizer micro plots in our study (1.5 × 1.5 m) challenges the above mentioned findings. On the large scale in a study by Pennock et al [70], increasing the rate of N fertilization did not reduce the variability of the grain yield of spring wheat. Mulla et al [71] found a slight reduction in the variation in grain yield of winter wheat under a spatially variable application of N fertilizer compared with uniform N fertilization at large scales; reducing N fertilization was possible without reducing grain yield.…”

Section: Small-scale Variability Of G W As Affected By Rate Of N Fertilizationmentioning

confidence: 81%

“…The spatial variation in the N response curves for G w and NUE was markedly larger in NT than in CT in 1999 because the growth of winter wheat was more sensitive to the extreme climate in winter under NT than under CT. The knowledge of spatial variation in the N response for grain yield is essential in order to improve the predictions of the spatial response of the crop to fertilizer inputs, which is the basis of varying the rate of N fertilization [70,85].…”

Section: Response Of Nue To N Fertilization As Affected By Tillage Systemmentioning

confidence: 99%

See 2 more Smart Citations

Small-Scale Variation in Nitrogen Use Efficiency Parameters in Winter Wheat as Affected by N Fertilization and Tillage Intensity

Lüder¹,

Qin

Richner

et al. 2020

Sustainability

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Limited information exists on how tillage and nitrogen (N) fertilization affects small-scale variation in nitrogen use efficiency (NUE) and crop performance. In a two-year field study under temperate conditions, we investigated how tillage (NT, no-tillage; CT, conventional tillage) and N fertilization affected the small-scale variation in NUE and winter wheat performance (grain yield, Gw; grain protein concentration, GPC). A randomized complete block design with three replications was used. Within each tillage plot (12 × 35 m2), N rates (0, 50, 100, 150, 200, 250 kg N ha−1) were completely randomized within each of four groups of microplots (1.5 × 1.5 m2). Early-season soil mineral N (Nmin) was also monitored in both years. At rates < 150 kg N ha−1, NT was not competitive with CT in terms of Gw and NUE. Gw and aboveground plant N were not correlated with Nmin prior to application of N fertilizer. NT usually led to larger spatial heterogeneity of Nmin, Gw, and NUE. The small-scale variability of Gw, GPC, NUE, and N supply decreased with increasing N fertilization rates under both tillage systems. Significant increases in Gw and GPC were observed with increasing N rates, whereas NUE decreased slightly with increasing N rates in both NT and CT. The overall moderate spatial variation in Nmin, Gw, and NUE did not justify site-specific N fertilization in these small fields, with the exception of the stony within-plot positions, which were not responsive to rates of N > 50 kg N ha−1.

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“…Variation in the GPC decreased with the increasing rate of N fertilization in our study. Pennock et al [70] detected the same reaction for spring wheat at a large scale.…”

Section: Small-scale Variability Of Gpc As Affected By Tillage Intensity and Rate Of N Fertilizationmentioning

confidence: 68%

Section: Small-scale Variability Of G W As Affected By Rate Of N Fertilizationmentioning

confidence: 81%

Section: Response Of Nue To N Fertilization As Affected By Tillage Systemmentioning

confidence: 99%

See 1 more Smart Citation

Small-Scale Variation in Nitrogen Use Efficiency Parameters in Winter Wheat as Affected by N Fertilization and Tillage Intensity

Lüder¹,

Qin

Richner

et al. 2020

Sustainability

View full text Add to dashboard Cite

show abstract

Acurácia de mapas altimétricos obtidos com DGPS na colheita de cereais

Cremonini¹

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Dryland Agriculture on the Canadian Prairies: Current Issues and Future Challenges

Larney

Janzen

Smith

et al. 2015

Challenges and Strategies of Dryland Agriculture

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Yield Response of Wheat and Canola to a Topographically Based Variable Rate Fertilization Program in Saskatchewan

Cited by 3 publications

References 5 publications

Small-Scale Variation in Nitrogen Use Efficiency Parameters in Winter Wheat as Affected by N Fertilization and Tillage Intensity

Small-Scale Variation in Nitrogen Use Efficiency Parameters in Winter Wheat as Affected by N Fertilization and Tillage Intensity

Acurácia de mapas altimétricos obtidos com DGPS na colheita de cereais

Dryland Agriculture on the Canadian Prairies: Current Issues and Future Challenges

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