Two field experiments were conducted at the experimental farm station of the Faculty of Agriculture, Benha University, during late summer seasons of 2006 and 2007. Tomato plants cv. super strain B were sprayed with yeast extract at 15 and 30 ml/L; marjoram extract at 15 and 30 ml/L and amino acids at 1.5 and 3 ml/L; vitamin E at 100 mg/L + selenium at 400/L; vitamin E at 200/L + selenium at 800/L; citric acid at 2.5 and 5 g/L; vitamin E at 100 mg/L + selenium at 400/L + citric acid at 2.5 g/L.; vitamin at 200 mg/L + selenium at 800/L+ citric acid at 5g/L; Boron at 25 and 50 mg/L; Zn at 50 and 100 mg/L after 15 days from transplanting. Treatments were done separately.
spraying was repeated 5 times with intervals of 15 days after the first one. This study amied to investigate the effect of these treatments on vegetative growth after 50 days from transplanting during the two seasons.
The results showed that, significant increase was existed in many growth aspects as stem length and diameter, number of formed branches and leaves/plant, fresh and dry weight of both stems and leaves, total leaf area/plant and specific leaf weight as well with all applied treatments at 50 days after transplanting during the two seasons. The yeast extract 30 ml/L, amino acids 3 ml/L ,Boron 25ml/L and Zinc 50ml/L.were the most effective compared with other treatments in this respect. Also, it increased the number of branches/plant more than two times of the control value.