scholarly journals Alternaria and Fusarium Fungi: Differences in Distribution and Spore Deposition in a Topographically Heterogeneous Wheat Field

2018 ◽  
Vol 4 (2) ◽  
pp. 63 ◽  
Author(s):  
Gabriele Schiro ◽  
Gernot Verch ◽  
Volker Grimm ◽  
Marina Müller
Keyword(s):  
Wheat Field ◽  
Spore Deposition ◽  
Fusarium Fungi

Effects of elevated CO2and increased temperature on wheat field arthropod community

2014 ◽  
Vol 22 (4) ◽  
pp. 502 ◽  
Author(s):  
Liu Shuai ◽  
Li Baoping ◽  
Meng Ling ◽  
Zhang Xuhui ◽  
Pan Genxing
Keyword(s):  
Arthropod Community ◽  
Wheat Field ◽  
Increased Temperature

Spatial Variability of Grain Cadmium and Soil Characteristics in a Durum Wheat Field

2002 ◽  
Vol 66 (1) ◽  
pp. 268 ◽  
Author(s):  
J. Wu ◽  
W. A. Norvell ◽  
D. G. Hopkins ◽  
R. M. Welch
Keyword(s):  
Spatial Variability ◽  
Durum Wheat ◽  
Soil Characteristics ◽  
Wheat Field ◽  
Grain Cadmium

scholarly journals A Sensitivity Analysis of the SPACSYS Model

Agriculture ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 624
Author(s):  
Yan Shan ◽  
Mingbin Huang ◽  
Paul Harris ◽  
Lianhai Wu
Keyword(s):  
Sensitivity Analysis ◽  
Wheat Yield ◽  
Climatic Conditions ◽  
Water Dynamics ◽  
Ecological Modelling ◽  
Soil Conditions ◽  
Model Parameters ◽  
Nutrient Inputs ◽  
Nutrient Pool ◽  
Wheat Field

A sensitivity analysis is critical for determining the relative importance of model parameters to their influence on the simulated outputs from a process-based model. In this study, a sensitivity analysis for the SPACSYS model, first published in Ecological Modelling (Wu, et al., 2007), was conducted with respect to changes in 61 input parameters and their influence on 27 output variables. Parameter sensitivity was conducted in a ‘one at a time’ manner and objectively assessed through a single statistical diagnostic (normalized root mean square deviation) which ranked parameters according to their influence of each output variable in turn. A winter wheat field experiment provided the case study data. Two sets of weather elements to represent different climatic conditions and four different soil types were specified, where results indicated little influence on these specifications for the identification of the most sensitive parameters. Soil conditions and management were found to affect the ranking of parameter sensitivities more strongly than weather conditions for the selected outputs. Parameters related to drainage were strongly influential for simulations of soil water dynamics, yield and biomass of wheat, runoff, and leaching from soil during individual and consecutive growing years. Wheat yield and biomass simulations were sensitive to the ‘ammonium immobilised fraction’ parameter that related to soil mineralization and immobilisation. Simulations of CO2 release from the soil and soil nutrient pool changes were most sensitive to external nutrient inputs and the process of denitrification, mineralization, and decomposition. This study provides important evidence of which SPACSYS parameters require the most care in their specification. Moving forward, this evidence can help direct efficient sampling and lab analyses for increased accuracy of such parameters. Results provide a useful reference for model users on which parameters are most influential for different simulation goals, which in turn provides better informed decision making for farmers and government policy alike.

scholarly journals Seasonal Patterns of Soil Respiration and Related Soil Biochemical Properties under Nitrogen Addition in Winter Wheat Field

PLoS ONE ◽  
2015 ◽  
Vol 10 (12) ◽  
pp. e0144115 ◽  
Author(s):  
Guopeng Liang ◽  
Albert A. Houssou ◽  
Huijun Wu ◽  
Dianxiong Cai ◽  
Xueping Wu ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Winter Wheat ◽  
Nitrogen Addition ◽  
Biochemical Properties ◽  
Seasonal Patterns ◽  
Wheat Field ◽  
Soil Biochemical Properties

The quality of runoff water collected from a wheat field margin in Greece

2002 ◽  
Vol 89 (1-2) ◽  
pp. 117-125 ◽  
Author(s):  
S.E. Tsiouris ◽  
A.P. Mamolos ◽  
K.L. Kalburtji ◽  
D. Alifrangis
Keyword(s):  
Runoff Water ◽  
Field Margin ◽  
Wheat Field

Oilseed rape

1984 ◽  
Vol 13 (3) ◽  
pp. 118-124 ◽  
Author(s):  
D. H. Scarisbrick ◽  
R. W. Daniels
Keyword(s):  
Oilseed Rape ◽  
Financial Incentives ◽  
Field Experiments ◽  
Full Potential ◽  
World Production ◽  
Wheat Field ◽  
The Third ◽  
Important Crop ◽  
The Uk

Oilseed rape is currently the third most important crop in the UK after barley and wheat. Field experiments show that despite the already attractive yields the full potential of the crop has not yet been achieved. However, its future is uncertain in that the area devoted to it within the EEC—representing one-fifth of world production—is strongly influenced by the financial incentives offered. It is suggested that within the Community output should be limited to 3.3m tonnes p.a. for the next five years.

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