Supporting Information Relationships between soil

Supporting Information Relationships between soil properties and the occurrence of the most agronomically important weed species in the field margins of eastern Arkansas - implications for weed management in field margins N E Korres, J K Norsworthy, K R Brye, V Skinner Jr, A Mauromoustakos Table S1. Misclassification values (actual vs. predicted) for the occurrence of the weeds under examination in relation to soil properties. Extractable Soil Nutrients

Soil Physical Properties

ACTUAL

ACTUAL

AMAPA1 Absent Present Total ACTUAL BRAPP2 Absent Present Total ACTUAL DIGSA3 Absent Present Total ACTUAL ECHCG4 Absent Present Total ACTUAL IPOSP5 Absent Present Total ACTUAL SIDSP6 Absent Present Total ACTUAL SORHA7 Absent Present Total

PREDICTED Absent 34 3 37 PREDICTED Absent 38 6 44 PREDICTED Absent 36 2 38 PREDICTED Absent 31 3 34 PREDICTED Absent 36 3 39 PREDICTED Absent 36 7 43 PREDICTED Absent 20 5 25

Present 4 16 20

Absent Present ACTUAL

Present 2 11 13

Absent Present ACTUAL

Present 2 17 19

Absent Present ACTUAL

Present 2 21 23

Absent Present ACTUAL

Present 3 15 18

Absent Present ACTUAL

Present 4 10 14

Absent Present ACTUAL

Present 2 30 32

Absent Present

PREDICTED Absent 35 3 38 PREDICTED Absent 37 4 41 PREDICTED Absent 36 11 47 PREDICTED Absent 29 7 36 PREDICTED Absent 32 2 34 PREDICTED Absent 36 6 42 PREDICTED Absent 14 3 17

Soil Chemical Properties ACTUAL Present 3 16 19

Absent Present ACTUAL

Present 3 13 16

Absent Present ACTUAL

Present 2 8 10

Absent Present ACTUAL

Present 4 17 21

Absent Present ACTUAL

Present 7 16 23

Absent Present ACTUAL

Present 4 11 15

Absent Present ACTUAL

Present 8 32 40

Absent Present

PREDICTED Absent 32 5 37 PREDICTED Absent 38 10 48 PREDICTED Absent 36 9 45 PREDICTED Absent 26 2 28 PREDICTED Absent 37 10 47 PREDICTED Absent 38 8 46 PREDICTED Absent 15 5 20

Present 6 14 20 Present 2 7 9 Present 2 10 12 Present 7 22 29 Present 2 8 10 Present 2 9 11 Present 7 30 37

1

1

A. palmeri (AMAPA); 2U. platyphylla (BRAPP); 3D. sanguinalis (DIGSA); 4E. crus-galli (ECHCG); 5Ipomoea spp. (IPOSP); 6S. spinosa (SIDSP); 7S. halepense (SORHA). Misclassification rate values, along with other statistics, for each weed species examined in relation to each soil property are provided in Tables 2, 3 and 4.

2

Table S2. Range of extractable soil nutrients and number of cases where individual weed species were recorded as present (or absent) at 57 randomly selected soil sampling sites Digitaria sanguinalis Na