WHEAT - Down 5 to 7 cents per bushel
* Wheat market under pressure from ample global supplies, forecasts for more rain in southern US Plains that is seen as beneficial for crop development in the region.
* French consultancy Agritel said on Friday it expected Russia's 2019 wheat harvest to reach 78.8 million tonnes, up from 72.1 million tonnes last year.
* Benchmark CBOT May soft red winter wheat futures contract hit lowest since March 12 during overnight trading session.
* MGEX May spring wheat futures set a new contract low overnight.
* CBOT soft red winter wheat ended overnight trading near session low. K.C. hard red winter wheat ended overnight trading at the session low.
* CBOT May wheat last traded down 6-3/4 cents at $4.37-1/2 per bushel. K.C. May hard red winter wheat was last down 5-1/2 cents at $4.14-1/2 and MGEX May spring wheat was down 3 cents at $5.20-1/4.
CORN - Down 1 to 3 cents per bushel
* Weakness in wheat weighs on corn market but short-covering expected to keep the declines in check.
* Commodity Futures Trading Commission data released on Friday showed that large speculators boosted their net short in corn to a record 323,665 contracts.
* CBOT May corn last traded down 2 cents at $3.56-1/2 per bushel.
SOYBEANS - Down 2 to 4 cents per bushel
* Soybean market under pressure from export concerns, expectations that farmers will plant more soybeans than the US Agriculture Department forecast at the end of March due to wet field conditions that will delay corn seeding.
* Soybeans ended overnight trading near their session low.
* Benchmark CBOT May soybean futures found support at low end of 20-day Bollinger range during overnight trading.
* CBOT May soybeans last traded down 3-1/4 cents at $8.77-1/4 per bushel.