Main Article Content
Field experiment was carried out during summer, 2018 at S. V. Agricultural College, Tirupati, Acharya N. G. Ranga Agricultural University to study the crop weather relationship of fodder sorghum varieties under different times of sowing. The experiment was in four dates of sowing (I Fortnight of January, II Fortnight of January, I Fortnight of February and II Fortnight of February) with varieties (CSV 21 F, CSV 30 F and CSV 32 F). Results are revealed that among the four times of sowing, different meteorological indices GDD, HTU, PTU, and TUE varied across the different growth stages. Early sowing (I Fortnight of January) had favorable agro-climatic conditions particularly temperature, day length and sunshine hours interms of required accumulation of GDD, PTU and HTU from sowing to harvest compared to other dates of sowing. Total requirement of accumulated GDD, HTU and PTU showed increasing trend with extension of sowing time from I Fortnight of January to II Fortnight of February. The CSV 32 F variety accumulated maximum GDD from sowing to until harvest.
Hoogenboom G. Contribution of agro-meteorology to simulation of crop production and its application. Agric. Forest Meteorol. 2000;103(1-2):137-157.
Rajput RP. Response of soyabean crop to climate and soil environment. Ph. D Thesis. Indian Agricultural Research Institute, Pusa, New Delhi; 1980.
Kumar A, Pandey V, Shekh AM, Kumar M. Radiation use efficiency and weather parameter influence during life cycle of soybean (Glycine max. [L] Mirrll) production as well accumulation of dry matter. American-Eurasian Journal of Agronomy. 2008;1(2):41-44.
Ahmad I, Shehzad MAB, Muhamadh A, Muhamadh A, Allahwasya, Hussain SZ. Agrometeorological, phenological and yield response of spring maize as influenced by foliar application of different plant growth regulators under suboptimal temperature of Faisalabad, Pakistan. Journal of Agrometeorology. 2016;18(2): 315-319.
Prakash V, Mishar JS, Kumar R, Kumar RS, Kumar SK, Dwivedi, Rao KK, Bhatt BP. Thermal utilization and heat use efficiency of sorghum cultivars in middle Indo-Gangetic plains. Journal of Agromateorology. 2017;19(1):29-33.
Hemalatha S, Sreelatha D, Anuradha M, Kumar SR. Crop weather relations in maize (Zea mays L.). Journal of Agrometeorology. 2013;15(2):165-166.
Thavaprakash N, Jagannathan R, Velayudham K, Gurusamy L. Seasonal influence on phenology and accumulated heat units in relation to yield of baby corn. International Journal of Agricultural Research. 2007;2(9):826-831.
Maurya SK, Nath S, Patra SS, Rout S. Influence of weather parameters on pearl millet (Pennisetum glaucum L.) varieties at Allahabad. Journal of Plant Development Sciences. 2015;7(12):863-868.
Leelarani P, Sreenivas G, Raji Reddy D. Thermal time requirement and energy use efficiency for single cross hybrid maize in South Telangana agro climatic zone of Andhra Pradesh. Journal of Agrometeorology. 2012;14(2):143-146.