Argentine soy prices sustained by Chicago's gains

* Soy prices in Rosario ended steady at between 1,270 and 1,300 pesos per tonne ($295-$302) versus 1,290 pesos in the prior session, sustained by gains at the Chicago Board of Trade, traders said.

* Soybean futures on the CBOT ended up on worries about the Argentine soybean crop amid continued hot and dry weather.

* In Rosario, soybeans for May delivery, priced in US dollars, closed unchanged at $300 per tonne.

* In the southern ports of Bahia Blanca and Quequen, soy closed at 1,080 pesos per tonne. No official prices were listed for those two markets on Tuesday.