A field experiment was carried out during the two successive seasons of 2016/2017 and 2017/2018. The aim of this study was to investigate the effect of farmyard manure (FYM) at four levels (0, 10, 15 and 20 m 3 /fed) in combination with Minia Azotein (M.A.) at 50 ml/plant and/or some vitamins (E and C) each at 50 ppm, in addition to the control on vegetative growth and flowering of Gladiolus grandiflorus var. Gold Field plants. Results showed that leaf length (cm), number of leaves/plant, leaves dry weight/plant (g), length of spike (cm), spike diameter (mm), spike fresh weight (g), number of florets/spike, lower floret diameter (cm) and lower floret fresh weight (g) were gradually increased by increasing the levels of farmyard manure with significant differences were detected between successive treatments. Also, Minia Azotein (M.A.) and/or some vitamins (E and C) treatments significantly increased all vegetative growth and flowering parameters in comparison with the control. Minia Azotein (M.A.) plus vitamins E and vitamin C were more effective in this concern. It was found also that the use of FYM (20 m 3 /fed) in combination with Minia Azotein (M.A.) plus vit. E and vit. C followed by 20 m 3 /fed FYM with M.A. + vit. C then 15 m 3 /fed FYM with M.A. + vit. E + vit. C noticeably improved the different vegetative growth and flowering parameters of gladiolus plants.

A field experiment was carried out during the two successive seasons of 2011/2012 and 2012/2013 to study the effect of compost levels (zero, 5, 10, 15 ton/fed.) and biofertilizers (effective microorganisms and active yeast), as well as, some vitamins (vitamin E and vitamin B1) and their interaction on Gladiolus grandiflorus cv. Eurovision plant. Results showed that vegetative growth (leaf length, number of leaves/plant and dry weight of leaves/plant), flowering aspects (length of spike, number of florets/spike and lower floret diameter) and corm production (corm diameter, corm dry weight and number of cormels per plant) were gradually increased by increasing the level of compost fertilizer.All biofertilizers and vitamins treatments significantly increased all vegetative growth characters, flowering parameters and corm and cormels production in comparison with the control. Effective microorganisms and active yeast treatment seemed to be more effective than other treatments in this concern. Their use of high level of compost (15 ton/fed.) in combination with combined biofertilizers treatment noticeably improved different vegetative growth characters, flowering parameters and corm production of gladiolus.

to study the effect of compost (7.5, 10.0 and 12.5 ton/fed) and seven treatments of stimulants i.e. control, seaweeds extract (300 ppm), amino acids (200 ppm), ascorbic acid (100 ppm), salicylic acid (50 ppm), active yeast (5 g/l) and Minia azotein (50 ml/plant), as well as their interaction on vegetative growth and flowering parameters of gladiolus plants. Data resulted that all compost levels increased vegetative growth parameters (leaf length, number of leaves/plant and leaves dry weight), flowering aspects (spike length, spike diameter, spike fresh weight, number of florets/plant, lower floret diameter and single floret fresh weight) comparing with control. Compost at 12.5 ton/fed was the most effective in this concern. All six used treatments of stimulant substances led to significant increase in all previous characters as compared to control, the maximum values were obtained by amino acids, followed by active yeast. The interaction treatments were significant with, the highest values recorded due to compost (12.5 ton/fed) in combination with either amino acids or active yeast.

The effects of compost (5, 7.5 and 10 ton/fed), NPK (50, 75 and 100%) and/or Effective micro-organisms/Minia Azotein fertilization on plant height, number and dry weight of flowering tops/plant and essential oil productivity (% and yield/plant) were investigated during 2012/2013 and 2013/2014 at the experimental farm, Fac. of Agric., Minia Univ. All treatments of compost significantly increased, plant height, number and dry weight of flowering tops/plant, as well as, essential oil percent and yield/plant. The high level of compost was more effective in this concern. The used of mineral NPK (100%) followed by 75% NPK + E.M. + M.A. treatments were the best results in increasing all previous characters. Generally supplying yarrow plants with compost at the rate of 10 ton/fed and fertilizing plants with NPK (100%) or reduce dose at (75% NPK) plus E.M. + M.A. gave overall the highest values of previous traits.

A field experiment was carried out to study the effect of reducing the recommended dose of mineral N fertilizer on parsley (Petroselinum sativum, Hoffm.) plants. To achieve this aim, some biostimulants commercial product (Minia azotein) which contain N fixing bacteria, seaweeds extract at 100 and 200 ppm and thiamine (Vit. B1) at 100 and 200 ppm, separately or in combinations were used. Results revealed that mineral N at 50 to 75% + Minia azotein significantly stimulated the vegetative growth traits, yield components, essential oil content, photosynthetic pigments and N % relatively to control plants (recommended dose of mineral N). Using mineral N fertilizer at 25% and Minia azotein significantly reduced the above-mentioned characters compared to check treatment. All treatments of seaweeds extract and/or thiamine (Vit. B1) significantly augmented the vegetative growth parameters, yield components, essential oil photosynthetic pigments and N % compared with control plants. The most effective treatment was seaweeds extract and Vit. B1 both at 200 ppm. The best results with regard to the herb dry and, fruit weight and essential oil productivity were obtained as a result of using N fertilizer at 50% plus Minia azotein in combinations with seaweeds extract + Vit. B1 each at 200 ppm.