OPTIMIZING THE REQUIREMENT OF POTASSIUM AND CALCIUM IN RAINFED GROUNDNUT OF POLLACHI TRACT

V. VASUKI¹*
¹Controllerate of Examinations, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
* Corresponding Author : vasukimanii@gmail.com

Received : 03-05-2022     Accepted : 28-05-2022     Published : 30-05-2022
Volume : 14     Issue : 5       Pages : 11365 - 11366
Int J Agr Sci 14.5 (2022):11365-11366

Keywords : Potassium, Calcium, Gypsum, Basal application, Spilt application, Groundnut
Academic Editor : Monpara B A, Bikash Subba, S. M. Chavan, Dr C. Harisudan, Dr R. S. Umakanth
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to All India Coordinated Research Project on Groundnut, Directorate of Groundnut Research, Junagadh, Gujarat and Tamil Nadu Agricultural University, Coimbatore, 641 003, India
Author Contribution : Sole author

Field experiments were conducted at Coconut Research Station, Aliyarnagar during kharif 2009, 2010 and 2011 to optimize the dose of potassium and calcium requirement. Soil was sandy clay loam with low organic carbon, low available nitrogen, high available phosphorus and low available potassium and neutral pH. Experiment was laid in Factorial Randomized Block Design with three replications, plot size was 20 m-2 (4 x 5 m-2). Three factors with Factor - A Gypsum application - as basal (100 %) and in splits (50 % basal and 50 % as top dressing on 45 DAS), Factor B - Potassium three levels 25, 50, 75 kg ha-1 and Factor C - Calcium 50, 100, 150 kg ha-1 applied as 100 % basal. Recommended doses of nitrogen and phosphorus (10:10 kg ha-1) applied as basal. Groundnut variety TMV 13 was used with spacing of 30 x 10 cm2. Results revealed potassium @ 75 and 50 kg ha-1 and calcium @ 150 and 100 kg ha-1 recorded significantly maximum pod yield. Among different methods of application of gypsum there were no significant difference, hence it can be applied either 100 % as basal or split application (50 % basal and 50 % top dressing on 45 DAS)

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