*Haryana Agricultural University, Hissar.
To study the effect of different micro-nutrient sprays on leaf composition, a field experiment was conducted on 4-year old Pineapple variety of sweet orange (Citrus sinensis L. Osbeck) at the Regional Fruit Research Station, Punjab Agricultural University, Abohar. Zn, Cu, Mn and Fe sprays alone or different combinations of Cu, Mn and Fe with Zn increased the leaf concentration of the respective elements by 2 to 7 times without decreasing the other element appreciably. This suggested that there was no antagonism amongst different micro-nutrients when applied as foliar sprays.
The Fe content of leaves was significantly increased by Zn and Mn sprays. Leaf N was not affected, whereas P was significantly increased by Mn, Zn+Cu+Mn and Zn+Cu+Fe and decreased by Zn and Zn+Fe treatments. The K concentration was significantly decreased by Zn+Cu + Mn, whereas, other treatments had no effect on it.
