* Wheat ends up Friday but big global supplies still weigh
* Corn finishes week down about 3 percent
* Soy ends down after choppy session; S. America weather eyed (Recasts throughout; updates prices, adds quotes, changes byline and dateline, previous PARIS/SINGAPORE)
By Julie Ingwersen
CHICAGO, Dec 2 (Reuters) - U.S. corn and wheat futures firmed on Friday on bargain-buying a day after falling to multi-month lows, but both grains posted weekly declines reflecting swelling global supplies.
Soybeans ended modestly lower after a choppy session.
Chicago Board of Trade March wheat WH7 settled up 8-3/4 cents at $4.04-1/4 per bushel and March corn CH7 ended up 4-3/4 cents at $3.47-1/4 a bushel.
January soybeans SF7 finished down 2-1/4 cents at $10.27-1/2 a bushel.
Wheat posted the biggest daily move as the market bounced from contract lows set a day earlier. For the week, however, March wheat WH7 fell 3.6 percent, its biggest weekly decline since late August.
Expectations of record wheat production in Australia, the world's fourth-largest exporter, have renewed pressure on futures prices following ample supplies from the Northern Hemisphere earlier this year. pointing to a big Canadian harvest, despite weather-disrupted field work, also reinforced the prospect of hefty global inventories. high Canadian wheat crop will add to the existing oversupply generated by record crops that have been achieved or are expected in Russia and Australia respectively," Commerzbank (DE:CBKG) analysts said in a market note.
Corn followed wheat's lead and rallied on Friday but still fell about 3 percent for the week.
Soybeans traded higher at times but closed lower and notched a weekly decline of 1.8 percent, pulled down by generally favorable crop weather as the South American soy crop develops.
"Demand remains robust for soybeans, necessitating a big South American crop, but thus far that's exactly what we are on track to get," INTL FCStone chief commodities economist Arlan Suderman said in a note to clients.
CBOT settlement prices:
Net
Pct Volume
Last change change
CBOT wheat
WH7
404.25
8.75
2.2 55115 CBOT corn
CH7
347.25
4.75
1.4 118604 CBOT soybeans SF7
1027.50 -2.25
-0.2 77728 CBOT soymeal SMF7
312.50 -0.20
-0.1 38960 CBOT soyoil
BOF7
37.72 -0.13
-0.3 58945
CBOT wheat, corn and soybeans shown in cents per bushel, soymeal in dollars per short ton and soyoil in cents per lb.