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Soil Report - Agriculture et Agroalimentaire Canada

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Styx <strong>Soil</strong>s (SYX)<br />

Location and Extent Most of the Styx soils are located on<br />

the till moraines in the northern part of the Township of<br />

Delhi . There are also a few occurrences in the Waterford<br />

area . There are only 29 ha of pure Styx map units, and 93 ha<br />

of Styx soils in complex map units associated with Muriel<br />

soils on the Tillsonburg moraine .<br />

Landform and Topography Styx soils are located in poorly<br />

drained, enclosed depressions on the Tillsonburg, Galt and<br />

Paris moraines . Although the basin topography is level, the<br />

surrounding moraine topography is often moderately to<br />

steeply sloping .<br />

Parent Materials and Textures Styx soils are deep organic<br />

soils consisting of more than 160 cm of organic material .<br />

The surface organic layer is well to moderately decomposed,<br />

whereas deeper layers are often fibric and less decomposed .<br />

<strong>Soil</strong> Moisture Characteristics Styx soils are very poorly<br />

drained . They are rapidly permeable, but groundwater is<br />

close to, or above the surface, most of the year . They have<br />

high water-holding capacities and very slow surface runoff .<br />

General <strong>Soil</strong> Description Styx soils are organic soils whose<br />

surface layers usually consist of about 40 cm of mesic or<br />

humic materials . Underlying these horizons, to a depth not<br />

exceeding 160 cm, organic textures are usually similar, but<br />

som<strong>et</strong>imes become less decomposed with depth . <strong>Soil</strong> classification<br />

is usually Typic Humisol .<br />

Commonly Associated <strong>Soil</strong>s Steeply sloping Muriel soils<br />

(MUI) are associated with, and enclose some of the swamps<br />

containing Styx soils in the Tillsonburg moraine . They are<br />

found on the soil map in map unit SYX 2 .<br />

General Land Use Comments<br />

(1) Styx soils are useful for veg<strong>et</strong>able crops if cleared and<br />

drained, but the advisability of this, from an environmental<br />

standpoint, is questionable .<br />

(2) Mainly because of the high watertables, Styx soils are of<br />

little value for commercial forestry .<br />

Tavistock <strong>Soil</strong>s (TVK)<br />

Location and Extent Tavistock soils are mostly found in the<br />

Waterford and Port Dover areas . There are 363 ha of pure<br />

Tavistock map units, and 2468 ha of Tavistock soils in<br />

complex map units which are often associated with loamy<br />

phase Brantford and Brantford soils .<br />

Landform and Topography Tavistock soils occupy areas of<br />

lacustrine clay plains where silt loam was deposited over the<br />

clays . The topography ranges from level to very gently<br />

sloping.<br />

Parent Materials and Textures Tavistock soils are developed<br />

on 40-100 cm of deep-water glaciolacustrine silt loam to very<br />

fine sandy loam that usually overlies silty clay or silty clay<br />

loam .<br />

<strong>Soil</strong> Moisture Characteristics Tavistock soils are imperfectly<br />

drained and moderately to slowly permeable . Groundwater<br />

temporarily saturates portions of the overlying silts, especially<br />

just above the clay contact, for short periods of time during<br />

the spring growing season . Although Tavistock soils have<br />

high water-holding capacities, surface runoff ranges from<br />

moderate to high depending on the slope .<br />

General <strong>Soil</strong> Description The surface Ap horizons of<br />

Tavistock soils are usually about 20 cm thick, and consist of<br />

silt loam, loam or very fine sandy loam . Similar textures<br />

occur in the upper subsoil down to the clay contact . Distinct<br />

or prominent yellowish-brown mottles are present in this<br />

zone . A weak, compacted hardpan may also occur at the<br />

silt-clay contact . The moderately to very strongly calcareous<br />

Ck horizon, which usually begins in the clay zone, is usually<br />

silty clay loam or silty clay . <strong>Soil</strong> reaction usually ranges from<br />

strongly acidic to neutral in the surface horizons, and mildly<br />

or moderately alkaline in the deeper subsoil . <strong>Soil</strong> classification<br />

is usually Gleyed Brunisolic Gray Brown Luvisol .<br />

Commonly Associated <strong>Soil</strong>s Brantford soils (BFO) and<br />

loamy phase Brantford (BFO .L) soils are often associated<br />

with Tavistock soils . Both soils differ from Tavistock soils by<br />

being moderately well-drained . Both also have shallwer<br />

deposits of loamy soils over lacustrine clays than Tavistock<br />

soils . Loamy phase Brantford soils have 15-40 cm of loamy<br />

materials over clay, whereas Brantford soils may have loamy<br />

surfaces no thicker than 15 cm . Brantford and Tavistock<br />

soils are mapped tog<strong>et</strong>her in map unit TVK 3 ; loamy phase<br />

Brantford soils and Tavistock soils occur tog<strong>et</strong>her in map<br />

unit TVK 5 .<br />

General Land Use Comments<br />

(1) Tavistock soils are very good agricultural soils, suitable<br />

for a wide range of field and horticultural crops . They may<br />

require some artificial drainage, especially if subsoils become<br />

compacted by heavy machinery .<br />

(2) Tavistock soils are somewhat b<strong>et</strong>ter than average for<br />

forest productivity, especially for European larch, white oak<br />

and tulip tree .<br />

.< r-i..-__<br />

Figure 38 . Tavistock soils occupy the level upland plain<br />

above the eroded Lake Erie shoreline near Normandale<br />

Toledo <strong>Soil</strong>s (TLD)<br />

Location and Extent Toledo soils are mapped over all but<br />

the western portion of the region that is occupied by sand<br />

plains and till moraines . There are 4480 ha of pure Toledo<br />

map units, and 19458 ha of Toledo soils in complex map<br />

units where they are often associated with Brantford and<br />

Beverly soils .<br />

Landform and Topography Toledo soils occur on poorly<br />

drained portions of the lacustrine clay plains that occupy<br />

most of the central and eastern part of the region. The<br />

topography ranges from level to very gently sloping .

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