MATHEMATICAL EQUATION TO DETERMINE THE TOTAL YIELD VALUE IN DIFFERENT INTERCROPPING SYSTEMS OF SOME VEGETABLE CROPS

الملخص

This experiment was conducted in the winter season of 2008-2009 at El-Khattara Experimental
Farm, Faculty of Agriculture, Zagazig University to study the effect of different intercropping systems on the
vegetative growth characters and yield, as well as to determine the total yield value of some vegetable crops, i.e.
garlic (the main crop), lettuce, peas and cabbage (the secondary crops) by using mathematical equation. The
obtained results showed that, all intercropping systems , i.e. garlic with lettuce, garlic with peas, and garlic with
cabbage caused a significant decrease in the vegetative growth characters and total yield of all crops under
study, as compared with grown each crop solely. The lowest values in this respect were move achieved via the
intercropping system between garlic with cabbage, followed by garlic with lettuce. On the contrary,
intercropping garlic with peas recorded less depression in this concern. With regard to the total yield value
(T.Y.V.), it is quite clear from the obtained results that, all intercropping systems as described above increased
the total yield value as compared with grown each crop alone. In this respect, the total yield value increased by
62.84%, 86.83 % and 51.19 % by intercropping garlic with lettuce, or peas, or cabbage, respectively.