* Profit-taking ahead of the weekend seen, but exporter and crusher buying noted for May contract. * Benchmark March contract finished with weekly gain of 0.9 percent. * March canola lost $2.90 to $524.40 a tonne on volume of 9,613 contracts. * May gave up $2.40 to $531.30 on volume of 6,952 contracts. * March-May spread traded 4,886 times, settling at a May premium of $6.90. * Chicago March soybeans shed 3-3/4 US cents to US$12.19 per bushel. March soyoil lost 0.35 cent to 51.59 US cents per lb. * MATIF February rapeseed finished unchanged. * The Canadian dollar was trading at $1.0016 against the US dollar or 99.84 US cents at 1:19 p.m. CST (1919 GMT), little change from Thursday's close at $1.0017, or 99.83 US cents. * US crude oil futures eased 0.1 percent to US$99.56 per barrel. * Canada weekly canola crushings rise 4 percent.