2005
DOI: 10.2134/agronj2005.0391
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Challenging Approaches to Nitrogen Fertilizer Recommendations in Continuous Cropping Systems in the Great Plains

Abstract: 1996). This also reduces the risk of nutrient leaching (Eck and Jones, 1992) and salinization (Black et al., Cropping systems in the Great Plains have evolved over the past 1981) because of increased water use during the growing two decades from reliance on summer fallowing to continuous cropseason. In addition, increasing crop production will inping under reduced or no-tillage. Most N recommendation models crease N removal, plant biomass production, and surface were developed in fallow systems under conven… Show more

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Cited by 40 publications
(21 citation statements)
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“…According to our equations developed from 180 site-years between 1991 and 1993, the optimum N fertilizer rates ranged from 66 to 100 kg N ha −1 , which is in agreement with the results of Schlegel et al (2005) and Arregui and Quemada, (2008). The remaining N required for wheat production is supplied primarily by the soil NO − 3 -N, which ranged from 26 to 40 kg N ha −1 at seeding for a 3890 to 4058 kg ha −1 wheat yield production ( Figure 1).…”
Section: Wheat Yield As a Function Of Fertilizer N And Soil No −supporting
confidence: 86%
“…According to our equations developed from 180 site-years between 1991 and 1993, the optimum N fertilizer rates ranged from 66 to 100 kg N ha −1 , which is in agreement with the results of Schlegel et al (2005) and Arregui and Quemada, (2008). The remaining N required for wheat production is supplied primarily by the soil NO − 3 -N, which ranged from 26 to 40 kg N ha −1 at seeding for a 3890 to 4058 kg ha −1 wheat yield production ( Figure 1).…”
Section: Wheat Yield As a Function Of Fertilizer N And Soil No −supporting
confidence: 86%
“…Nitrogen deficiencies can reduce water use efficiency due to reduced yield potential and greater soil evaporation (Fisher and Turner, 1979). In highly variable environments inherent to dryland cropping systems, variable N mineralization from soil organic matter and crop residues challenges prediction of an optimal N application rate (Schlegel et al, 2005).…”
Section: Sorghum Is Typically Grown Under Dryland Conditionsmentioning
confidence: 99%
“…Despite this however, some researchers still offer this approach as viable option. In the Great Plains, N rates near 70 kg N ha 71 or less were generally sufficient to optimize small-grain crops yields in several continuous cropping studies when estimates of yield goals were difficult to obtain and no information on residual soil N concentration was available (Schlegel et al 2005). Grain N concentration was affected in six of seven years.…”
Section: Nitrogen P and N By P Interactionmentioning
confidence: 99%