Abstract
This study was carried out during the summer seasons of 2007 and 2008 at the Experimental Farm of Environmental Agric. Sci. Fac., El-Arish, North Sinai, Egypt to study the effect of organic manures such as farmyard manure (FYM), and goat manure and spraying with some amendment substances; viz, chitosan and aminofort on growth, yield and some traits of fruit quality of tomato plants (pH and TSS%) under sandy soil conditions. The data revealed that tomato plants fertilized by goat manure and FYM, respectively as well as spraying of chitosan and aminofort significantly increased all vegetative parameters (plant height and number of both branches and leaves/plant), fresh and dry weight of different plant organs(roots, branches, leaves, and total of both fresh and dry weight of plant), photosynthetic pigments, yield/plant and marketable yield/feddan, but diseased yield (expressed in fruits infected by blossom end rot) was increased as a result of application of organic manures compared to control treatments. Meanwhile, application of chitosan decreased the diseased yield. On the other hand, pH and TSS (%) were not significantly affected.
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