* U.S. corn planting looks positive
* Wheat drops after rally, Black Sea tensions to buoy prices
HAMBURG, April 8 (Reuters) - Chicago corn fell on Monday on expectations of good U.S. planting weather and concerns about possible U.S. plans which could reduce the attraction of corn for biofuel production.
Wheat fell after last Friday’s strong gains, with a lack of weekend news about tension in the Black Sea. Soybeans were flat ahead of U.S. government world crop estimates on Thursday.
Chicago Board of Trade most active corn fell 0.1% to $4.33-1/2 a bushel at 1128 GMT. Soybeans fell 0.08% to $11.86 a bushel.
Wheat fell 0.3% to $5.65-1/2 a bushel.
"Grains and soybean markets are weaker today with continued favourable weather for U.S. crops and lack of news about geopolitical tensions over the weekend," said Matt Ammermann, StoneX commodity risk manager.
"U.S. weather forecasts for the Midwest are non-threatening to crops and we are likely to see good progress with U.S. corn plantings in coming weeks if weather holds. There is some concern about the U.S. government's expected proposals on aviation biofuels which could reduce the attractiveness of corn-based production."
Wheat rose on Friday on worries that Russian authorities have hindered grain exports by two large trading houses. But reports late on Friday said two ships involved have sailed and no major new weekend disruption was seen.
"In the Black Sea, we are not seeing signs of intensified attacks on Ukrainian ports," Ammermann said.
"In the background, there is also increasing belief the U.S. Federal Reserve may not cut rates in the near future which in turn could encourage funds to hold onto their short positions." (Reporting by Michael Hogan in Hamburg, additional reporting by Naveen Thukral in Singapore; Editing by Sherry Jacob-Phillips, Eileen Soreng and Alexander Smith)
