Response of nitrogen on growth and yield parameters of sunflower hybrids (Helianthus annus L.)
Abelardo JV, Hall AJ. 2002. Effects of planting date, genotype, and there interactions on sunflower yield: I. Determinants of oil-corrected grain yield. Field crops Sci. 42, 1191-1201.
Bakht J, Ahmad S, Tariq M, Akber H, Shaf, M. 2006. Performance of various hybrids of sunflower in Peshwar valley. Journal of Agricultural and Biological Science 1, 25-29.
Bakht J, Shafi M, Yousaf M, Shah HU. 2010. Physiology, Phenology and yield of sunflower (Autumn) as effected by NPK fertilizer and hybrids. Pak. J. Bot 42, 1909-1922.
Cheema MA, Malik MA, Hussain A, Shan Sh, Basra SMA. 2001. Effects of Time and Rate of Nitrogen and Phosphorus Application on Growth and the Seed and Oil yields of Canola (Brassica napus L.). Journal of Agronomy and Crop Science 186, 103-110.
Connor DJ, Hail AJ, Sadras VO. 1993. Effect of Nitrogen Contentds on the Photosynthetic Characteristics Sunflower Leaves. Aust. J . Plant physiol 20, 251-263.
Dreccer MF, Slafer A, Rabbinge R 2000. Comparative rssponse of heat and oilseed rape to nitrogen supply: absorption and utilization efficiency of radiation and nitrogen during the reproductive stages determing yield Plant and Soil 220, 189-205.
English SD, , Mcwilliam JR, Smith RCG, Davidson JL. 1979. photosynthesis and partioning of dry matter in sunflower. Functional Plant Biology 6(2), 149-164.
Gandhi AP, Jha K, Gupta V. 2008. Studies on the Production of Defatted Sunflower Meal with Low Polyphenol and Phytate Contents and its Nutritional Profile. ASEAN Food Journal 15 (1), 97-100.
Gholinezhad E, Aynaband A, Ghorthapeh AH, Noormohamadi G, Bernousi I. 2009. Study of the Effect of Drought Stress on Yield, Yield Components and Harvest Index of Sunflower Hybrid Iroflor at Different Levels of Nitrogen and Plant Population, Notulae Botanicae Horti Agrobotanici Cluj-Napoca, Vol. 37, No. 2, 85-94.
Go P. 2013. Agricultural statistics of Pakistan 2009-10, Govt. of Pakistan, Ministry of food, Agriculture and livestock, economic wing. Islamabad, Pakistan.
Jahangir AA, Mondal K, Nada K, Sadia R, Afroz, Hakim MA. 2006. Response of Nitrogen and Phosphorus Fertilizer and Plant Spacing on Groth and Yield Contributing Character of Sunflower. Bangladesh J. Sci 41(1-2), 33-40.
Kiniry JR, Jones CA, Toole JCO, Blanchet R, Cabelguenne M, Sopanel DA. 1989. Radiation use efficiency in biomass accumulation prior to grain filling for five- grain crop species. Field Crop Res 20, 51-64.
Massignam AM, Chapman SC, Hammer GL, Fukai S. 2009. Physiological determinants of maize and sunflower grain yield as affected by nitrogen supply. Field Crops Researc.
Miralles OB, Valero JAJ, Olalla FMS. 1997. Growth, development and yield of five sunflower hybrids. Eur. J. Agron 6, 47-59.
Nasim W, Ahmad A, Wajid A, Akhtar J, Muhammad DB. 2011. Effects on growth and development of sunflower hybrids under agro climatic conditions of multan. Pak. J. Bot 43(3), 2083-2092.
Soleimanzadeh H, Habibi D, Ardakani MR, Paknejad F, Rejali F. 2010. Response of Sunflower (Helianthus annus L.) to Inoculation with Azotobacter under different nitrogen levels. American-Eurasian J. Agric & Environ. Sci 7(3), 265-268.
Solemani A, Shahrajabian MH, Naranjani L. 2012. Effect of plating dates and different levels of nitrogen on seed yield and yield components of nuts sunflower. Research on Crops 13(2).
Steel G, James H, Torrie, David A. 1997. Pricnciple and Procedures of Statistics. A Biomteric Approach
Suzer S. 2010. Effects of nitrogen and planting density on dwarf sunfloer hybrids. Helia 33, 207-214.
Ullah MA, Anwar M, Rana AS. 2010. Effect of nitrogen fertilization and harvesting intervals on the yield and forage quality of elephant gass (Pennisetum purpureum) under mesic climate of Pothowar Plateau. Pakistan jJournal of Agriculture Science 47 No 3, 231-234.
Zheljazkov VD, Vick BA, Baldwin BS, Bue- hring N, Astatkie T, Johnson B. 2009. Oil Content and Satu- rated Fatty Acids in Sunflower as a Function of Planting Date, Nitrogen Rate, and Hybrid,” Agronomy Journal, Vol. 101, No. 4, 1003-1011.