Table 5

Importance of each variable selected by PLS and submitted to the Random Forest model (rank and absolute value of importance between brackets): rapeseed.

Factors DDM protein concentration (18 variables) Oil concentration to standards (21 variables)
Terres Inovia (TI) development regions 3 (40.3) 3 (36.2)
Soil texture 2 (42.5) 2 (36.8)
Varietal characteristics
•Potential DDM protein concentration 1 (45.9) 14 (11.1)
•Potential oil concentration to standards 13 (12.9) 4 (35.8)
•Type of variety 18 (6.2) 21 (5.5)
•Maturity earliness 16 (7.5) 19 (8.2)
•Flowering earliness 12 (13.1) 18 (8.3)
•Stem elongation 15 (7.6) 17 (8.6)
•Plant height 17 (6.3) 20 (7.5)
N Fertilization:
•Deviation of applied N rate from the optimum (X rate) 6 (34.5) 10 (24.7)
•Fraction of N amount applied late from the E stage 14 (8.2) 16 (9.2)
Sowing date 5 (35.6) 7 (26.7)
Grain yield to standards (at 9% moisture and 2% of waste) 8 (31.2)
Radiation (PAR)
•phase 6 10 (28.2) 9 (25.1)
•phase 10 6 (29.0)
Climatic deficit (P-PET)
•phase 7 - flowering 8 (25.3)
•phase 8 - grain filling 4 (36.5) 1 (37.1)
•phase 9 (spring recovery to G1) 7 (34.1)
•phase 11 (spring recovery: C2 to D1) 5 (30.6)
•phase 12 (bud formation: D2 to E) 11 (21.6)
with Tmax > 30°C
•phase 17 (grain filling: G2 to G4) 9 (28.2) 12 (19.5)
Number of days with Tmax > 28°C
•phase 15 (mid-flowering) 11 (21.3) 15 (10.4)
•phase 16 (G1) 13 (13.1)

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