Two field experiments were conducted in 2022/2023 and 2023/2024 seasons at  the Agricultural Research Station farm in Suez, Suez Governorate,   Agriculture Research Center to study The effect of different forms of zinc i.e.,  Zn SO₄  (21 % Zn)  at 3g/l,  Zn EDTA (15% Zn) at 100 ppm  and Zn Nano (NPs Zn)  at  50 ppm  and   manganese i.e.,  Mn SO₄ ( 31.8 %Mn) at 2g/l , Mn EDTA  (13 %Mn)  at 300 ppm and  Mn- Nano (NPs Mn) at  50 ppm  on the dry weight  productivity and seed quality  of faba bean plants grown  in loamy sand soil. The results indicated that all foliar spraying treatments with Zn or Mn in different forms suppressed dry weight, yield, and its components and chemical constituents in seeds compared to control. Whereas, foliar spraying with Zn nano (NPs Zn) at 50 ppm was the best treatment for increasing dry weight/plant, 100 grain weight, yield / plant, yield of grain and straw/fad, and biological yield N, P, K and Zn contents and their uptake by grains as well as total protein in grains, and N, P, K contents and their uptake by straw.  While, spraying with Mn Nano at 50 ppm gave the highest values of Mn concentration in grains and Mn uptake by grains. This treatment (Zn nano (NPs Zn) at 50 ppm produced an increase in total grain yield of about 52.43 and 53.15% equal (0.743 and 0.726 tons/fad.) over control in the 1^st and 2^nd seasons, respectively. In general, the effect of the treatments was positive on most of the studied traits and their order was as follows from most to least: Zn Nano > Zn EDTA > Zn SO₄ > Mn Nano > Mn EDTA > Mn SO₄ > control (unsprayed) in most studding parameters.