March 2021 | Volume 34 | Issue 1 | Page 193 Pakistan Journal of Agricultural Research Research Article Introduction A round the globe as population is increasing with the passage of time so dietary habits of individuals is also changing. Demand for food, fuel and feed is increasing associated with urbanization so there is huge pressure on agriculture to combat this type of situations ( Joufret et al., 2011). In Pakistan agriculture is the occupation through with 70 % of the population is involved directly or indirectly but still Abstract | Phosphorus (P) is a limited natural reserve and a major limiting factor for global crop production. Te adverse soil biogeochemical characteristics of alkaline-calcareous soils make P the least available macronutrient. Terefore, alternative P source such as rock phosphate (RP) can ofer a promising choice for sustainable P supply under P stress environment. A pot research was executed to explore the response of sunfower (Helianthus annuus L.) to sparingly soluble P sources grown under P defcient environment at research area, College of Agriculture, University of Sargodha during 2018. Te experiment was laid out in a Completely Randomized Design (CRD) with eight treatments replicated thrice. Te treatments consisted of T 1 = NK + P 0 (Control); T 2 = NPK (Recommended dose); T 3 = NK + Rock phosphate at 7 g pot -1 ; T 4 = NPK + Rock phosphate at 7 g pot -1 ; T 5 = NK + Rock phosphate at 7 g pot -1 + Wheat straw at 14 g pot -1 ; T 6 = NK + Rock phosphate at 7 g pot -1 + Wheat straw at 28 g pot -1 ; T 7 = NK + Rock phosphate at 7 g pot -1 + Rice straw at 14 g pot -1 ; T 8 = NK + Rock phosphate at 7 g pot -1 + Rice straw at 28 g pot -1 . Observations on various growth and yield parameters of crop were recorded using standard procedures and noted data was examined with a statistical software Statistix 8.1 analysis of variance technique and signifcant of treatments was tested using LSD test at probability level of 5%. Te maximum fresh biomass (95.50 g), dry biomass (25.73 g), plant height (110.90 cm), head size (21.36 cm), number of achene haed -1 (864) and achene yield plant -1 (32.16 g) of sunfower was observed with application of NK + Rock phosphate at 7 g pot -1 + Wheat straw at 28 g pot -1 (T 6 ) in cultivar Hysun-33. While, lowest value of fresh biomass (72.73 g), dry biomass (15.72 g), head size (16.63 cm), achene head -1 (711), achene yield plant -1 (18.36 g) was noted under NK + P 0 (T 1 ) treatment in Agwara-3. Among the tested sunfower cultivars, Hysun-33 showed superiority over Agwara-4. Hafz Hammad Ahmad 1 , Mukkram Ali Tahir 1 *, Noor-us-Sabah 1 , Ghulam Sarwar 1 , Sher Muhammad 2 , Muhammad Aftab 3 , Muhammad Zeeshan Manzoor 1 and Aneela Riaz 4 1 Department of Soil and Environmental Sciences, College of Agriculture, University of Sargodha, Sargodha, Pakistan; 2 Allama Iqbal Open University, Islamabad, Pakistan; 3 Institute of Soil Chemistry and Environmental Sciences, Ayub Agricultural Research Institute, Faisalabad, Pakistan; 4 Soil Bacteriology Section, Ayub Agriculture Research Institute, Faisalabad, Pakistan. Received | October 28, 2020; Accepted | December 08, 2020; Published | March 04, 2021 *Correspondence | Mukkram Ali Tahir, Department of Soil and Environmental Sciences, College of Agriculture, University of Sargodha, Sargodha, Pakistan; Email: rai786@gmail.com Citation | Ahmad, H.M., M.A. Tahir, N. Sabah, G. Sarwar, S. Muhammad, M. Aftab, M.Z. Manzoor and A. Riaz. 2021. Growth and yield response of sunfower to organic amendments in aridisol. Pakistan Journal of Agricultural Research, 34(1): 193-200. DOI | http://dx.doi.org/10.17582/journal.pjar/2021/34.1.193.200 Keywords | Organic amendment, Phosphorus, Growth, Yield, Sunfower Growth and Yield Response of Sunfower to Organic Amendments in Aridisol