|
|
| | Lu, Caiyan et al. EFFECT OF NITROGEN FERTILIZER AND MAIZE STRAW INCORPORATION ON NH4+15N AND N03 -15N ACCUMULATION IN BLACK SOIL OF NORTHEAST CHINA AMONG THREE CONSECUTIVE CROPPING CYCLES. J. Soil Sci. Plant Nutr., 2010, vol.10, no.4, p.444-453. ISSN 0718-9516
|
|