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Articles by Recep Cakir
Total Records ( 2 ) for Recep Cakir
  Recep Cakir and Ulviye Cebi
  A filed research was carried out in the years of 2000, 001 and 003 in order to determine the effect of different irrigation regimes and water stress imposed at earlier growth stages on vegetative growth and dry matter accumulation of flue-cured tobacco plant (Nicotiana tabacum L.). The field trials were conducted on the fields of Atatürk Soil and Water Resources Research Institute in Kirklareli. A randomised complete block design with three replications was applied and K-326 Virginia tobacco cultivar was used in the experiment. Three levels of irrigation water amount reduction (0, 0 and 60%) were applied at each development stage. Single irrigation was applied during the second part of vegetative stage, while subsequent water applications were done at 50 and 70% depletion level during the yield formation and ripening stages, respectively. Results of this 3-year study show that all vegetative parameters as well as dry matter accumulation processes were significantly affected by water shortage in the soil profile during the earlier growth stages. Water stress in various severity occurring during the rapid vegetative growth and yield formation periods reduced plant height, as well as influenced leaf number and leaf area development. Short-duration water deficits during the rapid vegetative growth period caused 26, 7 and 0; 10, 8 and 9 and 1.3, 8.5 and 9% loss of final dry matter weight of the plants, respectively for the three stress levels in 2000, 001 and 003. Losses in the ranges of 40-70, 5-17 and 2-25% could be expected as a result of water stress at three different levels during the yield formation period. Much greater 71, 82 and 71% losses were recorded as result of prolonged water stress during the periods of rapid growth and yield formation.
  Idris BAHCECI , Recep CAKIR , A. Suat NACAR and Pinar BAHCECI
  Soil salinity and water logging, as well as water scarcity, are the most common problems limiting irrigated agriculture crop production in southeast Turkey. Thus, this study was conducted in order to predict the effect of drainage control factors on irrigation efficiency, irrigation sufficiency, root zone salinity, and drain discharge using SaltMod simulation. Investigations were conducted in the Harran Plain, also known as the Fertile Crescent or Upper Mesopotamia. High crop evapotranspiration rates and deep water table levels have led to visible increases in irrigation water requirements in the region. Therefore, the level of the water table appears to be a factor of great importance to sustainable crop production. Root zone salinity will increase to 3.0 dS m-1 at the end of a 10-year period if the drainage control factor (Frd) increases to above 0.75; however, the drain discharge rate was estimated to decrease from 1.350 m to 0.050 m for the summer season and to increase to 0.026 m in the winter season. In contrast, total drainage is predicted to decrease while irrigation efficiency is forecasted to increase during the summer season.
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