الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The main results of the recent studies might be summarized in the following:
1- Green forage yield was significantly (P≥ 0.05) varied with cuttings. Neither seeding rates nor sowing methods had any significant effects on green forage yield. Also, the first and the second order interactions between seeding rates, sowing methods and cutting had not reached the level of significance.
2- The insignificant effects of both seeding rates, sowing method and their interaction might drive the conclusion that, 8 kg. faddan-1 and the simplest sowing method, broadcasting are suitable for Johnson grass cultivation. In the meantime, the slow growth rate of Johnson grass and the very limited green forage potentiality that was expressed by diminished total green forage yield might indicate that, Johnson grass is less competitive to the privielling forage crops in the Egyptian forage rotation of North Delta region.
3- Expressing green forage yield response to varying seeding rate as a regression relation, indicated that the rate of change in green forage yield with each unit increase in seeding rate was 0.263 ± 0.012 ton. faddan-1. Also, the trend of change in green forage yield with progressive increase in seeding rate was positive and significant ( r = 0.999). 4- The correlation coefficients between green forage of each cutting and the used rate of seeding were 0.933, 0.119, - 0.121 and 0.874 for the four successive cuttings respectively. It was valuable to notice that, the rate of change in green forage yield with each additional unit of seeding rate was only significant at the first cutting, although, there was a harmony in trend of change for each of seeding rate and green forage yield by the fourth cutting (appositive significant correlation = 0.874), the rate of change in green forage yield in response to each unit change in seeding rate had not reached the level of significance.
5- Neither seeding rates nor sowing methods had caused any significant variation in obtained by forage yield. The first and second order interactions between cutting and sowing rates, cutting and sowing method, seeding rate and sowing methods and cutting x seeding rates x sowing methods had not reached the level of significance.
6- Over sowingmethods, about 9-10 ton.faddan-1 of dry forage were obtained across seeding rates. the insignificant differences among the studied seeding rate might drive the conclusion that only 8 kg of Johnson grass seed is enough to produce that attained dry forage yield. Since, higher seeding rated had not resulted in any significant yield increament. Also, similar dry forage yield amount to 9-10 ton.faddan-1 were obtained regardless of the sowing method.
7- It might be concluded that broadcasting, the simplest sowing method is advised for Johnson grass cultivation. In the meantime, the slow growth rate of Johnson grass that 91 was expressed by limited dry forage potentiality might indicates that, Johnson grass is less competitive to the previelling forage crops in Egyptian forage rotation of North Nile Delta region.
8- The least productivity matched with winter season (about 3.5 ton.fad-1 from about seven month) regarded by about 1.4 ton.fad-1 from about two summer months. Also, Johnson grass productivity during Summer or Autumn months of the first season were of relative higher magnitudes (2.3 and 2.5 ton.fad-1. Two month -1, respectively).