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Table 7 Analysis of variance for mixed models of data on total aflatoxin values from biocontrol treated and untreated crops in four different countries during multiple years

From: Mitigation of aflatoxin contamination of maize, groundnut, and sorghum by commercial biocontrol products in farmers’ fields across Burkina Faso, Mali, Niger, and Togo

Crop

Country

Effect

Df

P-valuea

Groundnut

Burkina Faso

Aflasafe

1

< 0.0001

  

Year

2

< 0.0001

  

Aflasafe × Year

2

0.3270

 

Mali

Aflasafe

2

0.0000

  

Year

1

0.1354

  

Aflasafe × Year

2

0.1859

 

Niger

Aflasafe

1

< 0.0001

 

Togo

Aflasafe

2

0.0000

  

Year

1

0.0225

  

Aflasafe × Year

1

0.9801

Maize

Burkina Faso

Aflasafe

1

< 0.0001

  

Year

3

0.3849

  

Aflasafe × Year

3

< 0.0001

 

Mali

Aflasafe

2

< 0.0001

  

Year

3

0.0020

  

Aflasafe × Year

4

< 0.0001

 

Niger

Aflasafe

1

< 0.0001

Sorghum

Mali

Aflasafe

2

< 0.0001

  

Year

3

< 0.0001

  

Aflasafe × Year

4

< 0.0001

 

Niger

Aflasafe

1

< 0.0001

  1. aData were analyzed under the assumption of a binomial distribution for each crop by country combination. When there was significant treatment × year interaction effect, a model for each year was fitted separately, where treatment was considered as fixed effect and village as random effect. Predicted means were compared and ranked using Tukey’s Honest Significant Difference Test