22.03.2013 Views

Soil Report - Agriculture et Agroalimentaire Canada

Soil Report - Agriculture et Agroalimentaire Canada

Soil Report - Agriculture et Agroalimentaire Canada

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Parent Materials and Textures Vanessa soils have developed<br />

on 40-100 cm of nearshore lacustrine sand modified by wind<br />

action, over Wentworth till . The texture of the surface<br />

horizons is usually fine sandy loam, som<strong>et</strong>imes grading into<br />

fine sand or loamy sand with depth. The Wentworth till in<br />

this area ranges from somewhat gravelly loam to a gravelly<br />

fine sandy loam .<br />

<strong>Soil</strong> Moisture Characteristics Vanessa soils are poorly<br />

drained . Peaty phase Vanessa soils are very poorly drained .<br />

They both are rapidly permeable . Groundwater levels are at<br />

or near the surface most of the year, receding somewhat in<br />

the summer. Vanessa soils have low water-holding capacities<br />

and low surface runoff.<br />

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

soilsusually consist of 20-30 cm of fine sandy loam . Exceptions<br />

to this are some peaty phase Vanessa soils (VSS.P), that<br />

have 15-40 cm of organic soils comprising the surface<br />

horizon. Underlying the surface is a zone of variable<br />

thickness, usually b<strong>et</strong>ween 30 and 60 cm thick, of mainly<br />

fine sandy loam, or fine sand . Distinct or prominent, strong<br />

brown to dark yellowish-brown mottles occur in this zone<br />

and in the underlying till . The C horizon usually begins near<br />

the sand-gravel contact, and is strongly to very strongly<br />

calcareous . Textures of the grvelly till range from loam with<br />

10-20% gravel, to gravelly fine sandy loam . <strong>Soil</strong> reaction is<br />

usually neutral in the surface horizons, ranging to mildly or<br />

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

is usually Orthic Humic Gleysol.<br />

Commonly Associated <strong>Soil</strong>s Oakland (OKL) soils are often<br />

associated with Vanessa soils in map unit VSS 3 . They have<br />

similar textures but differ from Vanessa soils by being<br />

imperfectly drained.<br />

General Land Use Comments<br />

(1) Vanessa soils require artificial drainage before they can<br />

be used feasibly for agricultural crops . Drained Vanessa<br />

soils are used for grain corn and spring grains, and to a lesser<br />

extent for tobacco and certain veg<strong>et</strong>able crops.<br />

(2) Mainly because of their w<strong>et</strong>ness, Vanessa soils are of<br />

little value for forest production .<br />

Vittoria <strong>Soil</strong>s (VIT)<br />

Locationand Extent Vittoria soils occur in the western part<br />

of the region, where shallow sands overlie loamy lacustrine<br />

sediments, mainly in the Langton, Waterford and Vittoria<br />

areas . There are 422 ha of pure Vittoria map units, and 4391<br />

ha of Vittoria soils in complex map units in which they are<br />

most extensively associated with Walsher and Silver Hill<br />

soils .<br />

Landform and Topography Vittoria soils occupy lacustrine<br />

plains, composed of shallow wind-modified sands over silts .<br />

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

Parent Materials and Textures Vittoria soils have developed<br />

on 40-100 cm of fine sand to fine sandy loam lacustrine and<br />

eolian deposits, over lacustrine silt loam containing occasional<br />

layers of very fine sandy loam or silty clay loam.<br />

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

drained. They are usually rapidly permeable through the<br />

upper sandy materials, but slowly permeable through the<br />

underlying loamy materials that are often capped by a weak<br />

hardpan. Groundwater remains temporarily above this<br />

contact zone, som<strong>et</strong>imes into the growing season . Vittoria<br />

soils have relatively high water-holding capacities and slow<br />

surface runoff.<br />

50<br />

General <strong>Soil</strong> Description The depth of surfaceAp horizons<br />

in Vittoria soils is usually 20-25 cm . The textures of the<br />

surface and upper subsoil horizons of the sandy overlay<br />

materials are dominantly loamy sand, fine sand, fine sandy<br />

loam and loamy fine sand . Distinct or prominent strong<br />

brown to yellowish-brown mottles may occur in this sandy<br />

overlay, and in the underlying loamy materials. These loamy<br />

materials, which begin at the 40-100 cm depth, usually have<br />

silt loam textures, but silty clay loam and very fine sandy<br />

loam layers are not uncommon . The surface of the loamy<br />

materials is often semicemented . The C horizon usually<br />

commences near the sand-silt contact, and is generally<br />

strongly or very strongly calcareous. <strong>Soil</strong> reaction ranges<br />

widely in the surface horizons, from very strongly acidic to<br />

mildly alkaline . In the lower subsoil horizons, soil reaction is<br />

usually mildly or moderately alkaline . <strong>Soil</strong> classification is<br />

usually Gleyed Brunisolic Gray Brown Luvisol.<br />

CommonlyAssociated <strong>Soil</strong>s Walsher(WSH) and Silver Hill<br />

(SIH) soils are often associated with Vittoria soils ; they have<br />

similar textures, but differ by being well and poorly drained,<br />

respectively . Walsher soils are associated with Vittoria soils<br />

in map unit VIT 2 ; with Silver Hill soils in map unit VIT3.<br />

General Land Use Comments<br />

(1) Vittoria soils are good agricultural soils. Some tile<br />

drainage may be necessary for certain crops, and supplemental<br />

irrigation will be needed for high-value crops like tobacco .<br />

Grain corn, swe<strong>et</strong> corn, tomatoes, apples, strawberries and<br />

some other veg<strong>et</strong>able crops are grown commercially on<br />

these soils, at the present time .<br />

(2) Aside from minor limitations, related to the nutrient<br />

supply and erodibility of surface sands, Vittoria soils are<br />

eminently suitable for most commercial tree species.<br />

Walsher <strong>Soil</strong>s (WSH)<br />

Location and Extent Walsher soils are mapped in the<br />

western part of the region, where shallow sands overlie<br />

loamy lacustrine sediments, mainly in the Langton, Waterford,<br />

and Walsh areas . There are 1154 ha of pure Walsher map<br />

units, and 3322 ha of Walsher soils in complex map units<br />

where they are most often associated with Vittoria soils .<br />

Landform and Topography Walsher soils occupy loamy ;<br />

lacustrine plains over which have been deposited shallow<br />

lacustrine sands, that have usually been modified by wind<br />

action . The topography ranges from nearly level to strongly<br />

sloping, but most slopes are in the 2-5% range .<br />

Parent Materials and Textures Walsher soils have developed<br />

on 40-100 cm of sandy lacustrine and eolian deposits<br />

overlying loamy, lacustrine sediments. The texture of the<br />

sandy surface materials is dominantly loamy fine sand . The<br />

underlying loamy sediments usually have textures of silt<br />

loam or loam, with occasional layers of loamy very fine<br />

sand .<br />

<strong>Soil</strong> Moisture Characteristics Walsher soils are welldrained.<br />

They are usually rapidly permeable through the<br />

upper sandy materials, then slowly permeable through the<br />

underlying loamy sediments, which are, in places, capped by<br />

a relatively impermeable, compacted layer . Groundwater<br />

may be above this layer for brief time periods, usually not<br />

long enough to adversely affect plant growth . Walsher soils<br />

have relatively high water-holding capacities, and surface<br />

runoff ranging from slow on level areas to relatively rapid on<br />

steeper slopes .

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!