Soils of the - Agriculture and Agri-Food Canada
Soils of the - Agriculture and Agri-Food Canada
Soils of the - Agriculture and Agri-Food Canada
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(L)<br />
Commonly Associated <strong>Soils</strong> : Delta <strong>and</strong> Guichon soils <strong>of</strong>ten occur in close association with Ladner soil s<br />
Delta soils differ from Ladner soils by being somewhat more silty in texture <strong>and</strong> lack <strong>the</strong> well-developed cla y<br />
accumulation zone in <strong>the</strong> subsurface . Guichon soils differ by having saline, s<strong>and</strong>y material within 50 cm <strong>of</strong> thi :<br />
surface <strong>and</strong> also lack a well-defined clay accumulation zon e<br />
Vegetation :<br />
The native vegetation on Ladner soils has essentially all been removed by l<strong>and</strong> clearing an d<br />
cultivation . Rooting is mainly restricted to <strong>the</strong> upper 60 cm by dense subsurface soils <strong>and</strong> high watertable s<br />
General L<strong>and</strong> Use Comments : (1) Ladner soils are used for a variety <strong>of</strong> agricultural crops . Annual crop<br />
generally do well since high watertables tend to recede during <strong>the</strong> growing season . Perennials, however, suff e<br />
during winter months <strong>and</strong> artificial drainage is beneficial . Subsoiling improves water movement <strong>and</strong> rootin g<br />
depth. Puddling is a problem <strong>and</strong> <strong>the</strong> soils should not be cultivated when wet . (2) Low or variable bearin g<br />
strengths <strong>and</strong> high watertables limit Ladner soils for urban or .related uses . Foundations require speci a<br />
considerations <strong>and</strong> basements or o<strong>the</strong>r excavations will probably contain water for at least part <strong>of</strong> <strong>the</strong> yea '<br />
Septic tank effluent disposal is restricted by high watertables <strong>and</strong> low soil permeability . Underground install a<br />
tions . such as utilities, require special protection from corrosion by <strong>the</strong> saline subsoils . (3) Ladner soils appe a .<br />
moderately suited for western red cedar. Annual potential wood production by this species is estimated to be<br />
between 6 .5 <strong>and</strong> 8 m 3lha .<br />
Plate 29 Ladner son pr<strong>of</strong>+ e Humic Luvic Gleysol) . These moderately<br />
poorly drained, clayey soils have developed from deltaic deposits.<br />
They have a strongly leached grayish layer (6 to 11 in . (15 to 2 7<br />
cm) in <strong>the</strong> photo) under <strong>the</strong> cultivated surface . This is underlain by a<br />
clay enriched layer about 12 in . (30 cm) thick. Dark gray s<strong>and</strong> .<br />
usually saline . is present below depths <strong>of</strong> 3 ft (90 cm) or more.
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