Effect of farmyard manure and mineral nitrogen sources and rates on dry weight, photosynthetic pigments and yield of tomato grown in sandy soil [electronic resource].

Includes reference.

The present study was carried out at El-Khattara Experimental Farm, Fac. Agric., Zagazig University during the two summer seasons of 2004 and 2005, to study the effect of fertilization of tomato plants grown in sandy soil with farmyard manure (FYM); 0.0 and 40 m³/fed and two mineral nitrogen forms; NH₄-N and urea-N which were applied on three basic rates (60, 90 and 120 kg N/fed.) either solely or in combination; urea-N +N/Ll-N( 30+30, 45+45, 60+60) besides zero level of the both (check). Application of FYM at 40 m³/fed significantly enhanced dry weight of different tomato plant organs, photosynthetic pigments, N content in both roots and leaves and P and K content in stem as well as yield and its components expressed as average fruit weight, yield/plant and total yield/ fed., N at the highest level (120 kg), in general, was the most superior level for enhancing all the studied characters, specially, when applied in the form of 60 kg urea-N+60 kg NH4-N. Application of 40 m³ FYMJ fed combined with urea-N at the rate of 120 kg/fed or with 60 kg urea-N+60 kg NH4-N/fed was the superior and optimum interaction treatments.

Summary in Arabic.

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