The effect of organic nitrogen (compost added at 30 m3/fed.,
chicken manure at 20 m3/fed.) and inorganic nitrogen (calcium nitrate,
ammonium sulphate added at 100, 150 and 200 kg/fed. For all them) on the
production of tomato (Vr. Sacar) and some soil properties of sandy soil was
evaluated through a field experiment using a complete randomized blocks
design at EI-Ferdan area, EI-Ismalyia governorate. Results showed that the
inorganic materials led to the best results of plant growth and yield of tomato
where the calcium nitrate treatment at 200 kg/fed. gave the maximum value
of plant growth parameters and fruit yield of tomato followed by ammonium
sulphate, while the organic materials gave the minimum effect. The treatment
of 20 m3/fed. chicken manure was more effective than 30 m3/fed. compost
for the later one. On the other hand, the best results for soil properties were obtained
by organic materials application, where the chicken manure treatment
exhibited the highest value of organic matter, total porosity and available N, P
and K, while gave the lowest values for pH, ESP and S.d. followed by
compost treatment.