Impact of Variable Rate Fertilization on Subsurface Water Contamination in Wild Blueberry Cropping System

2013 ◽  
Vol 29 (2) ◽  
pp. 225-232 ◽  
Author(s):  
Shoaib Rashid Saleem ◽  
Qamar Uz Zaman ◽  
Arnold Walter Schumann ◽  
Ali Madani ◽  
Aitazaz Ahsan Farooque ◽  
...  
Keyword(s):  
Water Contamination ◽  
Cropping System ◽  
Subsurface Water ◽  
Variable Rate ◽  
Wild Blueberry

Impact of Variable Rate Fertilization on Ground Water Contamination in Wild Blueberry Cropping System

2011 ◽  
Author(s):  
Shoaib Rashid Saleem ◽  
Qamar Uz Zaman ◽  
Arnold W Schumann ◽  
Ali Madani ◽  
David C Percival ◽  
...  
Keyword(s):  
Ground Water ◽  
Water Contamination ◽  
Cropping System ◽  
Variable Rate ◽  
Ground Water Contamination ◽  
Wild Blueberry

Spot-application of fungicide for wild blueberry using an automated prototype variable rate sprayer

2013 ◽  
Vol 15 (2) ◽  
pp. 147-161 ◽  
Author(s):  
Travis J. Esau ◽  
Qamar U. Zaman ◽  
Young K. Chang ◽  
Arnold W. Schumann ◽  
David C. Percival ◽  
...  
Keyword(s):  
Variable Rate ◽  
Wild Blueberry

Performance Evaluation of a Prototype Variable Rate Sprayer for Spot - Specific Application of Bravo® Fungicide in Wild Blueberry

2011 ◽  
Author(s):  
Travis J Esau ◽  
Qamar Uz Zaman ◽  
Young K Chang ◽  
Arnold W Schumann ◽  
David C Percival ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Variable Rate ◽  
Wild Blueberry

Variable rate spreader for real-time spot-application of granular fertilizer in wild blueberry

2014 ◽  
Vol 100 ◽  
pp. 70-78 ◽  
Author(s):  
Hassan S. Chattha ◽  
Qamar U. Zaman ◽  
Young K. Chang ◽  
Scott Read ◽  
Arnold W. Schumann ◽  
...  
Keyword(s):  
Real Time ◽  
Variable Rate ◽  
Wild Blueberry

Development of a method for estimating the likelihood of crack flow in Canadian agricultural soils at the landscape scale

2010 ◽  
Vol 90 (1) ◽  
pp. 129-149 ◽  
Author(s):  
H. Dadfar ◽  
S E Allaire ◽  
R. De Jong ◽  
E. van Bochove ◽  
J -T Denault ◽  
...  
Keyword(s):  
Contaminant Transport ◽  
Best Management Practices ◽  
Water Contamination ◽  
Management Practices ◽  
Preferential Flow ◽  
Agricultural Soils ◽  
Landscape Scale ◽  
Tile Drainage ◽  
Risk Indicators ◽  
Subsurface Water

Indicators of risk of water contamination by agricultural pollutants are developed in Canada to assess sustainability of agriculture. Crack flow (CF), a key pathway for sub-surface contaminant transport, is part of the transport-hydrology algorithm used in two of these risk indicators. The objective was to develop a methodology for predicting the likelihood of CF in Canadian agricultural soils at the landscape scale. The algorithm considers soil clay content, crack development followed by a runoff event based on water budget, tile drainage, and crops. More than 40% of Canadian farmlands had moderate to very high likelihood of CF, mainly in Manitoba, Ontario and Quebec, due to frequent runoffs on cracked clay soils potentially contributing to groundwater contamination. In Ontario and Quebec, farmlands with high CF likelihood correspond to regions under intensive tile drainage, which increases the risk of lateral translocation of contaminants to surface water bodies. Besides being a component of risk indicators of water contamination by phosphorus and coliforms, the CF algorithm and maps can be used to identify areas at risk of subsurface water contamination. Best management practices, adapted to reduce CF can then be targeted to these areas.Key words: Agrichemicals, contaminant transport, macropore flow, preferential flow, risk assessment, risk indicators

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