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Table 3 Descriptive statistics for indices of the spatial diversity of the cowpea varieties grown in Nigeria

From: IITA’s genebank, cowpea diversity on farms, and farmers’ welfare in Nigeria

Index

Mean

SD

Minimum

Maximum

Total

 Menhinick index

2.656

1.838

0.442

31.623

 Shannon index

0.344

0.041

0

0.693

 Berger-Parker index

2.833

1.414

1

25

 Herfindahl index

0.169

0.123

0.002

1

North West region

 Menhinick index

2.896

2.051

0.515

31.623

 Shannon index

0.343

0.045

0

0.693

 Berger-Parker index

2.856

1.349

1

10

 Herfindahl index

0.169

0.128

0.01

1

North East region

 Menhinick index

2.204

1.230

0.442

9.129

 Shannon index

0.345

0.034

0

0.368

 Berger-Parker index

2.788

1.530

1

25

 Herfindahl index

0.170

0.112

0.002

1

  1. Means, standard deviations (SD), minimums and maximums are reported for each diversity index, and broken down by regions
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CABI Agriculture and Bioscience

ISSN: 2662-4044