ACCUMULATION, DISTRIBUTION AND UTILIZATION OF TOP DRESSING N-FERTILIZER
BY  15N TRACER METHOD IN FLUE-CURED TOBACCO GROWING ON YELLOW SOILS
WANG , FENG , CENG Ling-Ling, WANG Fa-Feng, ZHANG Wei-Li, LI Zhi-Hong
J4 . 2010, (3): 618 -622 .  DOI: 10.11869/hnxb.2010.03.0618