This work is licensed under a
Creative Commons Attribution 4.0 International License
 H. Nezami et al., Effect of drought stress and defoliation on sunflower (Helianthus annuus L.) in controlled conditions, Desert. 12 (2008) 99-104.
 M.S.A. Ahmad et al., Photosynthetic performance of two mungbean (Vigna radiata) cultivars under lead and copper stress, Int. J. Agric. Biol. 10 (2009) 167–172.
 V.S. Rathore, R.C. Gautam, S.K. Kaushik, Yield, quality and nutrient uptake by sunflower as influenced by weed and nutrient management, J. Annals Agric. Res. 22(3) (2001) 443-444.
 M.K. Hussain, E. Rasul, S.K. Ali, Growth analysis of sunflower under drought conditions, Int. J. Agric. Biol. 2 (2000) 136-140.
 H. Razi, M.T. Asad, Evaluation of variation of agronomic traits and water stress tolerant in sunflower conditions, Agric. Natural Res. Sci. 2 (1998) 31-43.
 T.I. Hussain, M.A. Ahmed, EM Technology-A new looks for IPNM, in: Proc. Symp., Integrated Plant Nutrient Management, NFDC, Islamabad, Pakistan, (2000).
 J.A. Adediran et al., Application of organic and inorganic fertilizer for sustainable maize and cowpea yields in Nigeria, J. Plant Nut. 27(7) (2004) 1163-1181.
 M.I. Bajwa, F. Rehman, Soil and fertilizer potassium, in: A. Rashid, K.S. Memon (Eds.) Soil Science, National Book Foundation, Islamabad, 1996, pp.317-338.
 S.M. Mian et al., Effect of MOP and SOP on plant chloride uptake and soil properties in a rice-wheat rotation, Pak. J. Soil Sci. 14(1-2) (1998) 70-74.
 I. Cakmak, The role of potassium in alleviating detrimental effects of abiotic stresses in plants, J. Plant Nutr. Soil Sci. 168 (2005) 521-530.DOI: https://doi.org/10.1002/jpln.200420485
 M.A. Chajjro et al., Sunflower hybrids differentially accumulate potassium for growth and achene yield, Pak. J. Agri., Agril. Engg., Vet. Sci. 29(1) (2013) 31-43.
 D.J. Reuter, J.B. Robinson, Plant analysis: An Interpretation Manual, 2nd Indian Ed., SBS Publishers & Distributors Pvt. Ltd., New Delhi, India, (2008).
 M. Aslam et al., Effect of single and combined use of various organic amendments on wheat grown over green manured soil growth and yield attributes, Pak. J. Nutr. 10 (2011) 640-646.DOI: https://doi.org/10.3923/pjn.2011.640.646
 R. Ahmad, Physio-Agronomic characteristics of semi dwarf and standard height sunflower hybrids as affected by nutritional area and potassium application, Ph.D. thesis, Department of Agronomy, UAF, Pakistan, (1993).
 M.T. Ramzan, Effect of different doses of potash on yield and oil content of sunflower, MSc. Thesis, Dept. of Agronomy U.A.F., (1994).
 A. Pervaiz, Effect of different sources and levels of potash on yield and oil content of spring sunflower (Helianthus annuus L.), M.Sc. Thesis, Dept. Agron., Univ. Agri. Faisalabad, (1996).
 A.U. Chaudhry, M. Mushtaq, Optimization of Potassium in sunflower, Pak. J. Biol. Sci. 2(3) (1999) 887-888.
 A.P. Sivamurugan, A. Balasubramanian, C.R. Chinnamuthu, Effect of N, P and K levels and seed setting treatments on yield attributing character and yield of sunflower, Madras Agric. J. 87(4/6) (2001) 291-294.
 Amanullah, M.W. Khan, Interactive eﬀects of potassium and phosphorus on Phenology and grain yield of sunﬂower in Northwest Pakistan, Soil Sci. 20(5) (2010) 674–680.DOI: https://doi.org/10.1016/s1002-0160(10)60057-4
 M.H. Siddiqui et al., Effect of NPK, micronutrients and N-placement on the growth and yield of sunflower, Sarhad J. Agric. 25(1) (2009) 45-52.
 S.A. Asadi, Influence of different K fertilizer sources on sunflower production, in: Proc. 19th World Congress of Soil Science, Soil Solutions for a Changing World 1 – 6 August 2010, Brisbane, Australia.
 M.S. Brar et al., Role of potassium nutrition in nitrogen use efficiency in cereals. Research Findings of Int. Potash Institute, (2011).
 M.A. Khan, K. Ahmad, J. Ahmad, Effect of potassium levels on the yield of sunflower (Helianthus annuus L.), Pak. J. of Biol. Sci. 2(2) (1999) 402-403.DOI: https://doi.org/10.3923/pjbs.1999.402.403
 S.A. Sadiq et al., Effect of various levels of Nitrogen, Phosphorus and potassium (NPK) on growth, yield and yield components of sunflower, Int. J. Agric. Soil. 5(1) (2000) 64-66.
 N. Nawaz et al., Yield and yield components of sunflower as affected by various NPK levels, Asian J. Agri. 3(7) (2003) 241 249.
 M.A. Malik et al., Effect of nitrogen and phosphorus application on growth, yield and quality of mungbean (Vigna radiata L.), Pak. J. Agric. Sci. 40(3/4) (2004) 133-136.
 S. Singh, M.S. Sidhu, Integrated use of organic and inorganic fertilizer sources in hybrid sunflower Helianthus annuus L. succeeding potato Solanum tuberosum L., J. Res, Punjab Agric. Univ. 31(3) (2004) 276-279.
 M. Mollashahi, H. Ganjali, H. Fanaei, Effect of different levels of nitrogen and potassium on yield, yield components and oil content of sunflower, Int. J. Farming and Allied Sci. 2 (2013) 1237-1240.
 A.G. Soomro et al., Growth and yield of sunflower in response to planting geometry and nitrogen foliar application at various crop stages, Am. Eurasian J. Agri. Environ. Sci. 15(1) (2014) 140-146.
 J. Bakht et al., Effect of irrigation on physiology and yield of sunflower hybrids, Pak. J. Bot. 42(2) (2015) 1317-1326.
 R. Ahmad et al., Yield potential and oil quality of two sunflower hybrids as affected by K application and growing seasons, Int. J. Agric. and Biol. 3(1) (2001) 51-53.
 F.F. Guilherme et al., Growth and physiological responses of sunflower grown under levels of water replacement and potassium fertilization, Afr. J. Agric. Res. 11(14) (2009) 1273-1281.