North Dakota, Minnesota furthest behind.

Higher temperatures in Midwest could come in 2031-40, researchers say.

Iowa corn at 9% planted is a quarter of typical progress for date.

Outlook depends on Russia-Ukraine and drought conditions in three countries.

Warmer, drier soils preferable for farmers.

But hefty carry-in supplies expected, speaker says.

Analysts see lasting impact on food inflation, supply chain.

War in Ukraine causing wheat and corn prices to skyrocket.