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Table 1 Chemical-physical analysis of potting mixes: Mix 1: green compost from Acea group; Mix 2: green composts from Mechelli Company and the ‘business as a usual’ potting mix from Truffleland Ltd. as control. The three substrates were used for the mycorrhization of Q. pubescens seedlings with T. melanosporum

From: Novel soil-less potting mixes for the mycorrhization of Quercus pubescens Willd. seedlings with Tuber melanosporum Vittad.

Property

Control

Mix 1

Mix 2

Physical

 pH, unit

7.7

7.1

7.4

 Total limestone, %

41.6

16.6

19.0

 Active limestone, %

12.1

1.7

1.2

 Organic C, %

3.43

8.03

7.18

 Organic matter, %

5.92

13.86

12.39

 Sand, %

29

76

76

 Silt, %

30

13

12

 Clay, %

41

11

12

 Texture

Clayey

Sandy loam

Sandy loam

Chemical

 N total, %

0.320

0.683

0.614

 C/N

10.7

11.7

11.6

 Calcium (Ca), ppm

5,220

5,940

6,300

 Magnesium (Mg), ppm

154

602

645

 Potassium (K), ppm

355

2,290

2,524

 Sodium (Na), ppm

126

468

548

 Boron (B), ppm

0.30

3.92

2.22

 Phosphorus (P), ppm

10

110

92

 Zinc (Zn), ppm

1.4

15.4

13.6