Two field experiments were carried out at Gemmeiza Agric. Res. St. Gharbia Governorate during 1993/1994 and 1994/1995 seasons to study the possibility of intercropping cotton with wheat 45 days before its harvest and cotton transplanting after wheat harvest and their effects on cotton growth, earliness, yield and its components, wheat yield, land use efficiency and total net income from unit area during full season compared to cotton and wheat sole croppings.

The obtained results can be summarized as follow:

1. Growing cotton as a pure stand after fallow gave the highest values of seed cotton yield and its components. It gave the first fruiting branch on significantly lower node and significantly reduced the number of days to first flower and increased earliness percentage. 2. Pure crop plants gave the higher grain and straw yields of wheat than those of the other tested patterns. 3. Results showed that intercropping cotton with wheat 45 days before its harvest in is more profitable than cotton transplanting after wheat harvest where, cotton transplanting after wheat harvest significantly reduced seed cotton yield per feddan and its components, increased node number of first fruiting branch, delayed days to first flower, reduced earliness percentage and gave the lowest monetary returns. 4. No significant differences were detected among different intercropping patterns in seed cotton yield and most of its components as well as yield of wheat. 5. Results showed that intercropping cotton with wheat in ridges 90 cm apart and hills 30 cm apart on both sides of the ridge with four rows of wheat at 10 cm apart (pattern 5) was the most profitable pattern since it increased land use efficiency by 4% and total net income during full season by about 16.72-18.55% compared to cotton sole cropping.