TY - JOUR T1 - Effect of Irrigation Regimes and Fertilizer Combinations on Yield of Two Potato (Solanum tuberosum L.) Cultivars in Freidan TT - تأثیر رژیم‌های آبیاری و ترکیب‌های کودی بر عملکرد دو رقم سیب‌زمینی در فریدن JF - JSTNAR JO - JSTNAR VL - 12 IS - 46 UR - http://jstnar.iut.ac.ir/article-1-1117-en.html Y1 - 2009 SP - 177 EP - 186 KW - Fertilizer combination KW - Irrigation KW - Regimes KW - Potato KW - Yield N2 - In order to determine the potato cultivars responses to irrigation regimes and fertilizer combinations, an experiment was conducted on Fereidan Research Farm, Isfahan Province in 2003. The trial was designed as split-split plot based on randomized complete block design with three replications. The cultivars (Arinda and Navita) were planted as main plots, and irrigated after 70, 140, 210 mm water evaporation from standard A pan surface that provided optimal watering, mild drought, and severe drought, respectively, as sub plots. Fertilizer combinations including of NPK + Zn, NPK+ Mn, NPK +Zn + Mn and NPK+ Manure were used as sub-sub plots. Results showed that the cultivar Arinda produced higher yield, mean tuber weight and total tuber number. By decreasing the amount of irrigation, the total yield and mean tuber weight were decreased. The highest amount of seed tubers (35-55 mm diameter) and marketable tuber sizes (diameter>35mm) and lowest amount of small size tuber numbers (diameter M3 ER -