Over the past three decades, the Soil Fertility, Irrigation and Crop Production Section of the
Joint FAO/IAEA. Division has conducted several International Co-ordinated Research …

In this study, the foliar fertilization efficiency was assesed by using nuclear techniques and
the stable isotope  15 N. The objective was to increase nitrogen use efficiency in plants. In …

Fertilizers are expensive and if not properly used can cause water pollution. Efficient use of
fertilizers is therefore of concern to both developing and developed countries. It is important …

Enhanced nutrient cycling basically involves close interaction between inorganic and
organic sources of nutrients. Contrasting scenarios of nutrient cycling are found under …

Fertilizers play a major role in increasing and stabilising the yield of different crops
throughout the world. In the farmersfield it is essential that fertilizer application to be made in …

The paper studies the regularities of the dynamics of nitrogen intake and distribution in the
plant in various phases of development, its movement through the organs, for the …

Fertilizers are one of the essential inputs which have to be used for maintaining and/or
increasing the soil fertility level in intensive agricultural systems. The purpose of applying …

The use of isotopes in studies of soil fertility in different cropping systems is important and
necessary especially in biological nitrogen fixation, for water stress and in phosphorus …

The effects of the experimental factors studied concerning isotopic indicators
(15N/14Nisotopic ratio, degree of δ15N isotopic accumulation, export of 15N isotope, 15N …

Fertilizer nitrogen (N) recovery fractions may be calculated by the difference or the isotope-
dilution method. With the first method an apparent recovery fraction (ARF) and with the latter …