Table 3-1. Limit input values in the PRISM Species Suitability Model for setting tall fescue suitability categories. Grid locations for which values fall outside the threshold extremes are mapped as unsuited for tall fescue.

Limits of suitability

Jan. min. temp.

July max. temp.

Annual precipitation

Water-balance relative yield

Soil pH

Soil drainage†

Soil salinity

Low

High

Low

High
 

---- °C ---- 

mm

%

-- pH --

  

 

dS/m

Well-suited

-12

31

625

80

5.38

7.98

SPD

WD

5.99

Moderate

-15

33

525

70

4.78

8.85

PD

ED

9.89

Marginal

-18

35

425

60

4.06

9.30

VPD

ED

13.15

† Soil drainage class abbreviations: SPD, somewhat poorly drained; WD, well drained; PD, poorly drained; ED, excessively drained; VPD, very poorly drained.

 

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Table of Contents

Tall Fescue Monograph