No abstract

No abstract

Two field experiments were carried out at a Private Farm in Qeft District, Qena Governorate, Egypt, during the two consecutive seasons of 2016/2017 and 2017/2018. To study the effect of humic acid rates (0.0, 1.0, 2.0 and 3.0 l/fad.), sprays number (one, two, three and four times at 25, 25 and 40 , 25, 40 and 55 as well as 25, 40, 55 and 70 days after planting, respectively and their combinations on vegetative growth, flower yield components and volatile oil production of chamomile plant. The obtained results referred to that the maximum values of plant height, branch number/plant, herb dry weight/plant as well as air-dry weight of flower heads/ plant and/fad., were detected when chamomile plants were applied with the highest rate of humic acid and sprayed three times during the season, in most cases. In the same time, the treatment of humic acid rate at 3 l/faddan combined with three application times was superior treatment in volatile oil percentage in flower heads and volatile oil yield (ml/ plant and l/faddan) of chamomile compared to the other ones under study during both seasons. Generally, this combination treatment seems promising in the development of sustainable crop growth and yield advantages under Qena Governorate conditions.

This study was carried out during the two successive seasons of 2007 and 2008 at the Experimental Farm of El-Kassasin Horticultural Research Station, Ismailia Governorate, to detect the effect of difference media culture and nitrogen sources and ratios and their interaction on growth and alkaloid content of Catharanthus roseus. Periwinkle plants were grown in nine different media types with nutrient solution during drip irrigation. Nitrogen was applied as constant concentration of 200 ppm using three different ratios between ammonical nitrogen and nitrate nitrogen as 100%

No abstract