Ferrari E., Bollani L., Coccia M., Cavallo E., Working Paper Cnr-Ceris, N. 05/2013

Table 3 – Significant relationships between sample characteristics
and questionnaire statements.
#

Variable 1

Variable 2

χ²

df

p

rs

df

p

Cramer’s
V

1

Important aspects in tractor usage
Environmental impact
Age
27.532

12

.006

.171

226

.010

.201

2

Environmental impact

Years of activity

23.015

6

.001

.225

226

.001

.225

3

Comfort

Farm size

16.069

6

.013

.477

226

.004

.270

4

Safety

Job title

15.209

6

.019

---

---

---

.183

5

Technological content

Geographical origin

22.971

12

.028

---

---

---

.183

Source of information on new technologies
6

Internet

Geographical origin

27.193

16

.040

---

---

---

.173

7

Edu. & research centers

Job title

20.179

8

.010

---

---

---

.210

8

Agricultural press

Years of activity

16.878

8

.031

.220

226

.001

.192

Useful technologies innovations
9

Speed > 40 Km

Geographical origin

32.758

16

.008

---

---

---

.190

10

Alternative flues

Geographical origin

27.187

16

.039

---

---

---

.173

11
12

Assisted Guidance System
Assisted Guidance System

Age
Farm size

29.010
15.961

16
8

.024
.043

-.200
.176

226
218

.002
.009

.178
.190

13

CVT-VARIO

Farm size

17.020

8

.030

.183

218

.006

.197

14

Overpower / Power Boost

Farm size

17.415

8

.026

.214

218

.010

.199

15

Remote diagnostics

Farm size

16.012

8

.042

.187

218

.005

.191

16

Alternative flues

Farm size

16.381

8

.037

-.168

218

.013

.193

17

Remote diagnostics

N° of tractors owned

21.701

12

.041

.141

226

.034

.178

18

Fleet management system

N° of tractors owned

24.177

12

.019

.167

226

.011

.188

Useful aspects of technologies innovations
19

Increase flexibility

Age

21.064

12

.049

.129

218

.050

.178

20

Increase flexibility

Job title

14.655

6

.023

---

---

---

.182

21

Increase safety

Job title

13.673

6

.034

---

---

---

.173

22

Increase safety

Years of activity

14.774

6

.001

.222

226

.001

.180

23

Increase reliability

Years of activity

18.880

6

.004

.219

226

.001

.203

24

Reduce environ. impact

Years of activity

22.537

6

.001

.181

226

.006

.222

25

Increase driving comfort

Geographical origin

35.950

12

.000

---

---

---

.229

Future interesting technologies innovations
26

Safety and warning

Years of activity

14.711

6

.023

.206

226

.002

.182

27

PTO infinite number

Geographical origin

21.625

12

.042

---

---

---

.182

between
sample
characteristics
and
questionnaire statements. A significant
association emerged between age and
importance given to environmental impact
reduction in the use of agricultural that
younger people are more environmentally
concerned than older people (Olli et al.,
2001). On the contrary, the analysis showed a
weak but statistically significant positive
correlation between age and importance of
environmental impact reduction (#1rs),

indicating that those who assigned the highest
score to the importance of reducing the
environmental impact were people aged
between 46 and 55 (figure 6).
Similarly, higher education is in general
positively associated with environmental
concern (Eckersley, 1989), and therefore it
was expected that highly educated participants
would have judged environmental impact
reduction very important in agricultural
tractors usage. However, any significant

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