Ranchi Agricultural College, Kanke, Ranchi, Bihar
*Present address: Tirhut College of Agriculture, Dholi, Muzaffarpur, Bihar
**Present address: ICAR Research Complex for NEH Region, Shillong, Meghalaya
Accumulation and decline of available Zn, Fe, Cu and Mn in soil were measured after four cycles of wheat-maize rotation under intensive cropping. A significant effect of continuous application of chemical fertilizers on the crop yield had been obtained. The initial available Fe, Cu, Mn and Zn declined in untreated soil and accumulated in soil treated continuously with chemical fertilizers under intensive cropping.
Available micronutrient, long-term use and high analysis fertilizer
