Nuclear Research Laboratory, Indian Agricultural Research Institute, New Delhi
*Present address: Department of Soil Science, Rajendra Agricultural University, Dholi Campus, (Muzaffarpur), Bihar
The fractionation of soil zinc after rice crop at I.A.R.I. Farm, New Delhi and A.R.I. Hyderabad indicated that the residual fraction constituted bulk of the native zinc in soil Application beyond 10 kg Zn/ha did not increase the amount af zinc present in the different fractions. Most of these fractions were found to be Interrelated. Complexed zinc was found to be the most important fraction from the point of view of plant uptake. The different zinc fractions together contributed to the zinc uptake by rice and the residual crop at Hyderabad with prediction values of 68 and 93 per cent, respectively. The prediction values were generally lower in the New Delhi experiment.
Zinc fractions in soil, plant uptake, direct and residual crops, rice and wheat
