NEW YORK, Aug. 30 (AP)—Ampal-American Palestine Trading Corporation today announced plans to sell $10,000,000 in debentures for development of the State of Israel. A spokesman for the organization said the bonds would be sold by direct solicitation rather than being marketed by an underwriting syndicate. He added that pledges have been received for about $500,000. The debentures will mature in 10 years and carry a 3 per cent coupon. They will be sold at par, or 100.