N uptake and distribution in crops: an agronomical and ecophysiological perspective.

By F. Gastal, G. Lemaire. Journal of Experimental Botany, 2002

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Effects of nitrogen deficiency on leaf photosynthesis, carbohydrate status and biomass production in two olive cultivars 'Meski' and 'Koroneiki' (2010, background): “Thus, the required level of accuracy for fertilisation practices is within 10% (Gastal and Lemaire, 2002).”
Optically assessed contents of leaf polyphenolics and chlorophyll as indicators of nitrogen deficiency in wheat (Triticum aestivum L.) (2005, background): “Thus, the required level of accuracy for fertilisation practices is within 10% (Gastal and Lemaire, 2002).”
Nitrogen uptake and remobilization in tetraploid ‘Langdon’ durum wheat and a recombinant substitution line with the high grain protein gene Gpc-B1 (2005, background): “Grain N accumulation is the result of N absorption from soil during vegetative growth, and its subsequent remobilization to the ear during grain filling, plus the N absorption from the soil after anthesis (Gastal and Lemaire 2002).”
Divergent selection for grain protein affects nitrogen use in maize hybrids (2007, background): “We use NUE here to encompass yield efficiency (the increase in grain yield per unit of applied N fertilizer) and its two components; uptake efficiency (the fraction of fertilizer applied N found in the plant at maturity), and utilization efficiency (the ratio of grain yield to plant N).”