Int.J.Curr.Microbiol.App.Sci (2021) 10(02): 1271-1277 1271 Original Research Article https://doi.org/10.20546/ijcmas.2021.1002.150 Effect of Heat Units on Growth and Yield of Groundnut Varieties under Different Planting Methods in Summer Season S. S. Khade 1 , B. V. Asewar 2 , B. R. Bobade 3* and Lalita Verma 2 1 Agricultural Meteorology, 2 Department of Agronomy, 3 FASAL, Agricultural Meteorology, VNMKV, Parbhani (M.S), India *Corresponding author ABSTRACT Introduction Among oilseed crops, groundnut occupies prime position in terms of acreage and production in India. Its high oil and protein content, ability to withstand water deficit conditions and remunerative price in market make it an attractive crop to farmers. Due to these agronomic and economic advantages it is an indispensable crop in the cropping pattern of Marathwada region of Maharashtra. India occupies first place in regard to acreage (6.40 M.ha.) and second in production (6.25 M.tones). In India during 2014 it was grown in an area of 55.27 lakh ha with total production of 96.72 lakh tones and productivity 1804 kg/ha. About 80% of area under groundnut is concentrated in 5 states as Gujrat rank first in area and production of groundnut, it contributes 38% of total production of India followed by Andhra Pradesh 16%, Tamil Nadu 14% Rajasthan 9%, Maharashtra 8.22%and Karnataka 8%. In Maharashtra during 2014 area under groundnut was 2.67 lakh /ha, Production was 3.25 lakh tones and productivity was 1217 kg/ha. (www.indiastat.com). In Marathwada weather conditions are prevailed during post monsoon season match International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 10 Number 02 (2021) Journal homepage: http://www.ijcmas.com A field experiment was conducted in the summer seasons of 2014 on three groundnut varieties (V 1 –TAG-24, V 2 –SB-XI and V 3 -LGN-1) sown on four different land configurations (L 1 - Ridges and furrow, L 2 - Broad bed furrow, L 3 – Sara and L 4 -Flat bed) at the research farm of Department of Agronomy, Vasantrao Naik Marathwada Agricultural University, Parbhani. The experiment was laid out in a split plot design with three replications where the land configurations and the varieties were considered as main plot and sub plot treatments respectively. The objective of this experiment was to study the effect of heat units on growth and yield of groundnut in summer season as temperature increases GDD and HTU of crop increased and it depends on duration of varieties. Total GDD requirement of SB-XI is greater than TAG-24 and LGN-1.Bud emergence and pod emergence phases which might have played a crucial role in the yield of the crop and performed better in BBF and Ridges and Furrow land configurations. Keywords GDD, HTU, Groundnut, Varieties and Land configurations Accepted: 12 January 2021 Available Online: 10 February 2021 Article Info