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Table 11 T test results for selected variables (by cropping system)

From: Is there any economics in smallholder cocoyam production? Evidence from the forest agro-ecological zone of Ghana

Variable

Cropping system

Mean per ha

SD

Mean differencea-b

T-statistic

Yield per ha (corms + leaves)

Solecropa

7042

3631.71

1057

6.53**

Intercropb

5985

6052.63

Total production cost

Solecrop

3469

1642.44

124

2.06

Intercrop

3345

1601.52

Gross margin

Solecrop

5420.5

4897.16

616.4

6.18**

Intercrop

4806.1

4950.94

Net income (corm only)

Solecrop

4876

4008.23

1413

7.26**

Intercrop

3463

3121.11

Total net income (corm + leaves)

Solecrop

5103.5

4038.99

641.1

3.77**

Intercrop

4462.1

3957.54

Return on assets

Solecrop

29.1

10.19

7.9

4.16**

Intercrop

21.2

19.13

Returns to land

Solecrop

1457.3

911.78

619

8.03**

Intercrop

838.3

665.81

Return to unpaid labour and mgt

Solecrop

4046.3

3155.96

1011

4.21**

Intercrop

3035.3

2971.68

  1. ** Significant scores at 5% significance level