THE STUDY ON EFFECT OF ZEOLITE ON NITROGEN USE EFFICIENCY OF CORN BY ~(15)N-ISOTOPE DILUTION METHOD Effects of Different Zeolite Amount on the Growth of Potted Malus hupehensis Rehd. Seedlings and Utilization of 15N-urea Cationic form of natural zeolite and their agricultural suitability Effects of Different Zeolite Amount on the Growth of Potted Malus hupehensis Rehd. Seedlings and Utilization of 15N-urea Application of salt-isolation materials to a coastal region: effects on soil water and salt movement and photosynthetic characteristics of Robinia pseudoacacia Effect of natural zeolite on soil nutrient bioavailability and soil chemical properties Effect of natural zeolite on nutrient preserving capability of degraded slope soil in South China Effects of zeolite on growth and ionic contents of cucumber seedlings under NaCl stress