EFFECT OF PRECEDING CROPS IN THREE-YEAR CROP ROTATIONS AND N RATES ON YIELD AND YIELD COMPONENTS OF EGYPTIAN COTTON | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 23, Volume 80, Issue 1, March 2002, Page 293-307 PDF (4.67 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2002.304224 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| BADR S. FARGHLY; ABDEL-HAFEZ A. ZOHRY | ||||
| Crop Intensification Research Section, Field Crops Research Institute, Agricultural Research Center, Giza, Egypt | ||||
| Abstract | ||||
| Four types of cotton rotations have been started since 1995/ 1996 season at Shandaweel Agric. Res. St. (Upper Egypt) to evaluate the effect on cotton production of different crop sequences and N rates on yield and yield components of cotton. Four preceding crop sequences viz., wheat/maize (P1), wheat/soybean (P2), faba bean/maize (P3) and faba bean/soybean (P4) were studied as main plots. Three nitrogen levels, i.e. 45,60 and 75 Kg N/fed. were applied to the cotton crop in the sub-plots. Results in 1999 and 2000 seasons Indicated that preceding crops significantly affected plant height, number of fruiting branches/ plant, total open bolls/plant, average bolls weight and weight of seeds/ boll. In both seasons seed cotton yield was 11.4 and 15.7% higher when cotton followed soybean than cotton grown after the cereal crops. All studied cotton characters were increased by increasing N levels up to 75 Kg N/fed. Seed cotton yield from 75Kg N/fed. Was higher than at 60 and 45 Kg N/fed. by 8.5, 15.9%, 6.73 and 16.88% in first and second seasons, respectively. The highest performance of cotton was observed when cotton was grown after legume crops and fertilized with 75 Kg N/fed., while the lowest performance was obtained following cereal crops and the lowest N level in both seasons. | ||||
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