March soyabeans on the Chicago Board of Trade rallied early Tuesday as technical buying escalated when the front month surpassed $10 a bushel, traders said. Underpinning soyabeans were concerns about Argentine crop weather. Weekend rains were forecast but the amount of rainfall was in question. March soyabeans were up 13-3/4 cents at $10.05-3/4 by 10:13 am CST.