The CBOT collapsed on Tuesday with corn locked limit-down shortly after the opening bell and soybeans flirting with limit-down moves all day. Wheat futures gapped sharply lower as well and finished with 28-34-cent losses for the day. Soymeal and soyoil did not escape the selling pressure either and settled sharply lower, with December soyoil posting a limit-down move for the day. While the day saw steep losses for most ag markets only wheat posted a settlement outside its trading range, which means all other markets are still technically trading sideways.  The primary catalyst for the day’s selling was improved weather forecasts for the central U.S. and – shockingly – even the northern Plains. Forecasts of meaningful...