A field experiment was conduct at Ismailia Research Station, to study the
effect of FYM and gypsum, on nitrogen fertilizer use efficiency, for wheat plant (Sakha
69). Three different rates of N i.e. Nso, N100 and N₁20 kg/fed were used. FYM and
gypsum were added individually or combined along with previous different rates of N.
The obtained results ccild be summarized as follows: Wheat yield components we, e in ascending order as N doses were
increased. The absolute highest values 1900 and 3079 kg/fed grains and straw yields,
respectively, were obtained from the treatment, having combined FYM and gypsum
with N12okglfed. Thus to promote microorganisms activities and benefit the root
media reaction, which in turn increase N fertilizer use efficiency. The results of grain protein % and grain protein yield kg/fed were in harmony with
trends of N concentration% and N uptakes kg/fed. However, these values are greatly
ahected by higher N application rate (N₁20) and combined FYM + gypsum treatment. The active effect of FYM and gypsum led to increase plant absorption
ability of P and K comparing with the other treatments. It could be recommended to take into consideration, that FYM and gypsum are very
important toqether, with N fertilizer, in order to increase nitrogen fertilizer use
efficiency.