الفهرس 
Effect of planting date on earlinessOnly 14 pages are availabe for public view
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Abstract
At present, the cotton crop in Egypt is facing several problems. First is the competition between cotton and other crops. The relative increase of production costs of cotton made it profitable to grow other crops. Egyptian cotton occupies the land for 8-9 months requiring high cost of each process starting from land preparation up to l~arvcsting. The result was the reduction of cotton area to almost half the area grown twenty years ago and the present crop is about half !-he iinr111-71 crop of 10 million Itentars. The present study was designed to shorten the cotton season in order to save or ininimize the production cost and to allow growing cotton after full winter crops on the saine land. Two approaches were followed. First approach: transplanting cotton so that we can grow cotton soinetiine in April or May to allow the previous winter crop to mature as in case of rice. Second approach: propagate cotton vegetatively by cuttings late in April for the saine purpose. Vegetative cot ton propagation have several other advantages beside shor tening of the cotton growing season in the field. These advantages are 1- saving of cotton seed, 2. assure varietal purity, 3- producing hybrid cotton and 4- reducing cotton loss by early and late insects. A- Cotton transplanting This part of work was carried out during the two successive seasons, 1989 and 1990 on Giza 75 cotton variety at Gemmeiza Agricultural Research Station, Agricultural Research Center, Ministry of Agriculture, Egypt. Two experiments were performed in each season to evaluate cotton transplanting. The design of both the experiments was a stripplot design with four replicates. Experiment (I) This experiment included twelve treatments which were the coinbinations of four planting methods and three planting dates as follows: (A) planting methods 1- Cominon dry seed method. 2- Double irrigation seed n~ethod 3- Transplanting of seedlings with ball 4- Transplanting of seedlings without ball (B) planting dates 1- March 22d 2- April 6 tl.1 3- April 21 st Experiment (11) This experiment included nine treatments which were the combinations of two transplanting methods and three seedling ages in coinparison with the common method by seed as a control at the time of transplanting to evaluate transplanting methods. (A) Trai~splantingm ethods I. Transplanting of seedlings with ball 2. Transplanting of seedlings without ball (B) seedling ages I- Four weeks old before transplanting 2- Five weeks old before transplanting 3- Six weeks old before transplanting .