![](media/image1.png){width="0.9in"
height="0.7229166666666667in"}**Natural**

**United States Resources**

**Department of Conservation Warwick**

**Agriculture Service Rhode Island**

***HIGHLY ERODIBLE***

***SOIL MAP UNITS***

***OF RHODE ISLAND***

Revised January, 1993 Rhode Island Field office Technical

Guide Section II D

**[SOIL MAP UNITS OF HIGHLY ERODIBLE LAND]{.underline}**

**[INTRODUCTION]{.underline}**

Natural processes continually create new soil from the underlying raw
parent material or from bedrock. For most soils in Rhode Island these
processes offset about 3 tons of erosion per acre per year. Erosion
rates lower than the rate of soil development are considered
\"tolerable\". Most soils have been assigned a tolerance value, which is
based mainly on the thickness of the soil above bedrock or unaltered
parent material.

Natural Resources Conservation Service soil scientists and soil
conservationists determine if a soil, or soil map unit, is \"highly
erodible\" or \"potentially highly erodible\" due to sheet and rill
erosion. This determination is done by using the Universal Soil Loss
Equation (USLE). The USLE relates the effects of rainfall, soil
characteristics, and the length and steepness of slope to the soil\'s
tolerable sheet and rill erosion rate.

[Definition of Highly erodible soil]{.underline}

A highly erodible soil, or soil map unit, has a maximum potential for
erosion that equals, or exceeds, eight times the tolerable erosion rate.
The maximum erosion potential is calculated without consideration to
crop management or conservation practices, which can markedly lower the
actual erosion rate on a given field. The maximum potential erosion rate
is determined using the formula: RKLS/R (where R = the rainfall factor,
K = erodibility value of the soil, and LS = the slope factor). If RKLS/T
\> 8 then the soil meets the criteria for a highly erodible soil.

[CRITERIA FOR DETERMINING HIGHLY ERODIBLE SOIL MAP UNITS]{.underline}

The procedure for determining whether a given soil map unit qualifies as
highly erodible or potentially highly erodible is as follows:

Step 1. For each soil map unit in the soil survey legend, calculate the
minimum LS value required for (RKLS/T \> 8) by solving for LS. (i.e. LS
= 8T/RK)

Step 2. For the specific combinations of slope length and steepness
specified in the next two steps, obtain LS values from Table 3 in
Agricultural Handbook 537, Dec. 1978.

Step 3. A soil map unit qualifies as highly erodible if the LS value for
the shortest length slope in combination with the minimum percent slope
(as defined in the map unit description) meets the criteria of RKLS/T
\>8. (See appendices A-H)

Step 4 A soil qualifies as potentially highly erodible if:

> a\. The LS value for the shortest slope length, in combination with
> the minimum percent slope, (as defined in the soil map unit
> description) is less than 8T/RK.
>
> \- and -

b.  The LS value for the longest slope length, in combination with the
    maximum percent slope, (as defined in the soil map unit description)
    is greater than or equal to 8T/RK.

> (See appendices A - H)

[NOTE]{.underline}:

\*\* For soil map units containing more than one named soil, the map
unit listing is based on the most erosive soil.

\*\* Soil map units containing soils that have not been assigned a \"K\"
value were not evaluated, and do not show up on these list. (Examples:
beaches, gravel pits, sand dunes, dumps, Udorthents, etc.)

\*\* Soil map units which do not appear on the highly erodible or
potentially highly erodible lists, [and]{.underline} have been assigned
a \"K\" value, are considered non highly erodible. These soils generally
are on nearly level landscapes.

**[List of Soil Map Units That Qualify as]{.underline}**

**[Highly Erodible Land]{.underline}**

From the [Soil Survey of Rhode Island]{.underline}

(Correlated and published, 1981)

CaD \* Canton-Charlton-Rock Outcrop Complex, 15-35% slopes

CdC Canton and Charlton fine sandy loams, 8-15% slopes

ChC \* Canton and Charlton very stony fine sandy loams, 8-15% slopes

ChD \* Canton and Charlton very stony fine sandy loams, 15-25% slopes

GBD Gloucester-Bridgehampton complex, hilly

GhD \* Gloucester-Hinckley very stony sandy loams, hilly

HkD Hinckley gravelly sandy loam, hilly

NeC Newport silt loam, 8-15% slopes

\* = Rocky, very stony, or extremely stony soil map units. These soils
generally are not suited

for cultivation without removal of surface stones. If enough stones are
removed to permit

regular tillage then the soil map unit designation should be changed to
a non-stony phase.

**[List of Soil Map Units That Qualify as]{.underline}**

**[Potentially Highly Erodible Land]{.underline}**

From the [Soil Survey of Rhode Island]{.underline}

(Correlated and published, 1981)

AfB Agawam fine sandy loam, 3-8% slopes

BhB Bridgehampton silt loam, 3-8% slopes

BmB Bridgehampton silt loam, till substratum, 3-8% slopes

BnB \* Bridgehampton-Charlton Complex, very stony 0-8% slopes

BnC \* Bridgehampton-Charlton Complex, very stony 8-15% slopes

BoC \* Bridgehampton-Charlton Complex, extremely stony, 3-15% slopes

BrB Broadbrook silt loam, 3-8% slopes

BsB Broadbrook very stony silt loam, 0-8% slopes

CaC \* Canton-Charlton-Rock outcrop complex, 3-15% slopes

CdB Canton and Charlton-fine sandy loams, 3-8% slopes

CeC \* Canton and Charlton-fine sandy loams, very rocky 3-8% slopes

ChB \* Canton and Charlton-very stony fine sandy loams, 3-8% slopes

CkC \* Canton and Charlton-very stony fine sandy loams, 3-15% slopes

EfB Enfield silt loam, 3-8% slopes

GBC Gloucester-Bridgehampton complex, rolling

GhC \* Gloucester-Hinckley very stony sandy loams, rolling

HkC Hinckley gravelly sandy loam, rolling

HnC Hinckley-Enfield complex, rolling

LgC \* Lippitt gravelly sandy loam, very rocky, 3-15% slopes

MmB Merrimac Sandy loam, 3-8% slopes

NaB Narragansett silt loam, 3-8% slopes

NbB \* Narragansett very stony silt loam, 0-8% slopes

NbC \* Narragansett very stony silt loam, 8-15% slopes

NcC \* Narragansett extremely stony silt loam, 3-15% slopes

NeB Newport silt loam, 3-8% slopes

NfB \* Newport very stony silt loam, 3-8% slopes

NoC \* Newport extremely stony silt loam, 3-15% slopes

**[List of Soil Map Units That Qualify as]{.underline}**

**[Potentially Highly Erodible Land]{.underline}**

From the [Soil Survey of Rhode Island]{.underline}

(Correlated and published, 1981)

PaB Paxton fine sandy loam, 3-8% slopes

PbB \* Paxton very stony fine sandy loam, 0-8% slopes

PbC \* Paxton very stony fine sandy loam, 3-15% slopes

PcC \* Paxton extremely stony fine sandy loam, 3-15% slopes

PmB Pittstown silt loam, 3-8% slopes

PnB \* Pittstown very stony silt loam, 0-8% slopes

PsB Poquonock loamy fine sand, 3-8% slopes

QoC Quonset gravelly sandy loam, rolling

RaB Rainbow silt loam, 3-8% slopes

RbB \* Rainbow very stony silt loam, 0-8% slopes

SdB \* Scio very stony silt loam, 0-8% slopes

StB Sutton fine sandy loam, 3-8% slopes

SuB \* Sutton very stony fine sandy loam, 0-8% slopes

SvB \* Sutton extremely stony fine sandy loam, 0-8% slopes

WbB Wapping silt loam, 3-8% slopes

WcB \* Wapping very stony silt loam, 0-8% slopes

WdB \* Wapping extremely stony silt loam, 0-8% slopes

WhB Woodbridge fine sandy loam, 3-8% slopes

WoB \* Woodbridge very stony fine sandy loam, 0-8% slopes

WrB \* Woodbridge extremely stony fine sandy loam, 0-8% slopes

\* = Rocky, very stony, or extremely stony soil map units. These soils
generally are not suited for

> cultivation without removal of surface stones. If enough stones are
> removed to permit regular tillage then the soil map unit designation
> should be changed to non-stony phase.

[APPENDIX - A]{.underline}

K = .17

T = 3

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (3)                   

  LS        =      RK          =     \(150\) (.17)    =      0.941
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       TILLABLE SOIL           EROSION INDEX

  percent      length (ft.)   (nonstony phases)       

               (min.) (max.)                          
  --------- -- -------------- ----------------------- -----------------------

3-15 (C) 50 200 Gloucester, Hinckley Quonset Potentially HEL

15-35 (D) 50 200 Gloucester, Hinckley HEL

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       NON-TILLABLE            EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (stony phases)          
  --------- -- -------------- ----------------------- -----------------------

3-15 (C) 50 200 Gloucester Potentially HEL

15-35 (D) 50 200 Gloucester HEL

**\* NOTE:** Stony phases of soil are generally non-tillable. If the
stones have been removed then the soil should no longer be classified in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3 - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1 percent, 0.3 for 1 to
3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5
percent slopes and steeper; and θ = angle of slope. (For other
combinations of length and gradient interpolate between adjacent values
of see fig. 4.)

[APPENDIX - B]{.underline}

K = .20

T = 3

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (3)                   

  LS        =      RK          =     \(150\) (.20)    =      0.80
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       NONTILLABLE SOIL \*     EROSION INDEX

  percent      length (ft.)   (stony phases)          

               (min.) (max.)                          
  --------- -- -------------- ----------------------- -----------------------

0-8 (B) 50 200 Bridgehampton, Charlton, Potentially HEL

Canton, Sutton, Wapping

0-8 (B) 50 300 Paxton, Pittstown, Potentially HEL

Woodbridge

3-15 (C) 50 200 Canton, Charlton Potentially HEL

3-15 (C) 50 300 Paxton Potentially HEL

8-15 (C) 50 200 Canton, Charlton Potentially HEL

8-15 (C) 50 300 Paxton Potentially HEL

15-25 (D) 50 200 Canton, Charlton HEL

15-35 (D) 50 200 Canton, Charlton HEL

**\* NOTE:** Stony phases of soils are generally non-tillable. If the
stones have been removed then the soil should no longer be classifies in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3. - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1 percent, 0.3 for 1 to
3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5
percent slopes and steeper; and θ = angle of slope. (For other
combinations of length and gradient interpolate between adjacent values
of see fig. 4.)

[APPENDIX - C]{.underline}

K = .20

T = 2

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (2)                   

  LS        =      RK          =     \(150\) (.20)    =      0.53
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       NONTILLABLE \*          EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (stony phases)          
  --------- -- -------------- ----------------------- -----------------------

3-15 (C) 50 200 Lippitt Potentially HEL

**\* Note:** Stony phases of soil are generally nontillable. If the
stones have been removed then the soil should no longer be classified in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3. - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1percent, 0.3 for 1 to 3
percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5 percent
slopes and steeper; and θ = angle of slope. (For other combinations of
length and gradient interpolate between adjacent values of see fig. 4.)

[APPENDIX - D]{.underline}

K = .24

T = 3

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (3)                   

  LS        =      RK          =     \(150\) (.24)    =      0.667
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       TILLABLE                EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (nonstony phases)       
  --------- -- -------------- ----------------------- -----------------------

3-8 (B) 50 300 Paxton, Woodbridge, Potentially HEL

Poquonock

3-8 (B) 50 200 Canton, Charlton, Potentially HEL

Merrimac, Sutton

8-15 (C) 50 200 Canton, Charlton HEL

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       NONTILLABLE \*          EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (stony phases)          
  --------- -- -------------- ----------------------- -----------------------

0-8 (B) 50 300 Paxton Potentially HEL

3-8 (B) 50 300 Narragansett Potentially HEL

3-15 (C) 50 300 Canton, Charlton, Potentially HEL

Newport

8-15 (C) 50 300 Canton, Charlton HEL

Sutton

**\* Note:** Stony phases of soil are generally nontillable. If the
stones have been removed then the soil should no longer be classified in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3. - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1 percent, 0.3 for 1 to
3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5
percent slopes and steeper; and θ = angle of slope. (For other
combinations of length and gradient interpolate between adjacent values
of see fig. 4.)

[APPENDIX - E]{.underline}

K = .28

T = 3

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (3)                   

  LS        =      RK          =     \(150\) (.28)    =      0.571
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       TILLABLE                EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (nonstony phases)       
  --------- -- -------------- ----------------------- -----------------------

3-8 (B) 50 300 Pittstown, Rainbow Potentially HEL

3-8 (b) 50 200 Agawam, Wapping, Narragansett Potentially HEL

8-15 (C) 50 200 Newport HEL

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       NONTILLABLE \*          EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (stony phases)          
  --------- -- -------------- ----------------------- -----------------------

0-8 (B) 50 300 Broadbrook, Rainbow Potentially HEL

**\* Note:** Stony phases of soil are generally nontillable. If the
stones have been removed then the soil should no longer be classified in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3. - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1 percent, 0.3 for 1 to
3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5
percent slopes and steeper; and θ = angle of slope. (For other
combinations of length and gradient interpolate between adjacent values
of see fig. 4.)

[APPENDIX - F]{.underline}

K = .37

T = 3

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (3)                   

  LS        =      RK          =     \(150\) (.37)    =      0.432
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       NONTILLABLE             EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (stony phases)          
  --------- -- -------------- ----------------------- -----------------------

0-8 (B) 50 200 Scio Potentially HEL

**\* Note:** Stony phases of soil are generally nontillable. If the
stones have been removed then the soil should no longer be classified in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3. - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1 percent, 0.3 for 1 to
3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5
percent slopes and steeper; and θ = angle of slope. (For other
combinations of length and gradient interpolate between adjacent values
of see fig. 4.)

[APPENDIX - G]{.underline}

K = .43

T = 3

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (3)                   

  LS        =      RK          =     \(150\) (.43)    =      0.372
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       NONTILLABLE \*          EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (stony phases)          
  --------- -- -------------- ----------------------- -----------------------

0-8 (B) 50 200 Bridgehampton Potentially HEL

**\* Note:** Stony phases of soil are generally nontillable. If the
stones have been removed then the soil should no longer be classified in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3. - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1 percent, 0.3 for 1 to
3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5
percent slopes and steeper; and θ = angle of slope. (For other
combinations of length and gradient interpolate between adjacent values
of see fig. 4.)

[APPENDIX - H]{.underline}

K = .49

T = 3

  --------- ------ ----------- ----- ---------------- ------ ---------------
                   8T                8 (3)                   

  LS        =      RK          =     \(150\) (.49)    =      0.327
  --------- ------ ----------- ----- ---------------- ------ ---------------

  --------- -- -------------- ----------------------- -----------------------
  SLOPE                       TILLABLE                EROSION INDEX

  percent      length (ft.)   SOILS                   

               (min.) (max.)  (nonstony phases)       
  --------- -- -------------- ----------------------- -----------------------

3-8 (B) 50 200 Bridgehampton, Enfield Potentially HEL

3-15 (C) 50 200 Bridgehampton Potentially HEL

**\* Note:** Stony phases of soil are generally non-tillable. If the
stones have been removed then the soil should no longer be classified in
a stony phase. In general, if tilled crops are produced in a field that
the soil map indicates is very or extremely stony, then the soil mapping
should be field checked.

TABLE 3. - Values of the topographic factor, LS, for specific
combinations of slope length

and steepness \'

  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------
  Slope                                                                                                  
  length                                                                                                 
  (feet)                                                                                                 

  Percent\                  25     50     75     100    150    200    300    400    500    600    800    1,000
  Slope                                                                                                  

  0.2        ............   .060   .069   .075   .080   .086   .092   .099   .105   .110   .114   .121   .126

  0.5        ............   .073   .083   .090   .096   .104   .110   .119   .126   .132   .137   .145   .152

  0.8        ............   .086   .098   .107   .113   .123   .130   .141   .149   .156   .162   .171   .179

  2          ............   .133   .163   .185   .201   .227   .248   .280   .305   .326   .344   .376   .402

  3          ............   .190   .233   .264   .287   .325   .354   .400   .437   .466   .492   .536   .573

  4          ............   .230   .303   .357   .400   .471   .528   .621   .697   .762   .820   .920   1.01

  5          ............   .268   .379   .464   .536   .656   .758   .928   1.07   1.20   1.31   1.52   1.69

  6          ............   .336   .476   .583   .673   .824   .952   1.17   1.35   1.50   1.65   1.90   2.13

  8          ............   .496   .701   .859   .992   1.21   1.41   1.72   1.98   2.22   2.43   2.81   3.14

  10         ............   .685   .968   1.19   1.37   1.68   1.94   2.37   2.74   3.06   3.36   3.87   4.33

  12         ............   .903   1.28   1.56   1.80   2.21   2.55   3.13   3.61   4.04   4.42   5.11   5.71

  14         ............   1.15   1.62   1.99   2.30   2.81   3.25   3.98   4.59   5.13   5.62   6.49   7.26

  16         ............   1.42   2.01   2.46   2.84   3.48   4.01   4.92   5.68   6.35   6.95   8.03   8.98

  18         ............   1.72   2.43   2.97   3.43   4.21   4.86   5.95   6.87   7.68   8.41   9.71   10.9

  20         ............   2.04   2.88   3.53   4.08   5.00   5.77   7.07   8.16   9.12   10.0   11.5   12.9
  ---------- -------------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ -------

\' LS = (λ 72.6)^m^ (65.41 sin² θ + 4.56 sin θ + 0.065) where λ = slope
length in feet; m = .02 for gradients less than 1 percent, 0.3 for 1 to
3 percent slopes, 0.4 for 3.5 to 4.5 percent slopes and 0.5 for 5
percent slopes and steeper; and θ = angle of slope. (For other
combinations of length and gradient interpolate between adjacent values
of see fig. 4.)