ISSN : 0975-3710
EISSN : 0975-9107
M. RATNAM1*, S. RAJAMANI2, S. VINDYA3, V. SATYANARAYANA RAO4
1Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522 034, Andhra Pradesh, India
2Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522 034, Andhra Pradesh, India
3Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522 034, Andhra Pradesh, India
4Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522 034, Andhra Pradesh, India
* Corresponding Author : mekala1968@gmail.com
Received : 28-09-2019 Accepted : 17-02-2020 Published : 28-02-2020
Volume : 12 Issue : 4 Pages : 9581 - 9583
Int J Agr Sci 12.4 (2020):9581-9583
Keywords : Equivalent Yield, Rainfed, Pigeonpea
Academic Editor : Dr Shubham Lamba, Kannan C. S. Warrier
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522 034, Andhra Pradesh, India
Author Contribution : All authors equally contributed
A field trail was conducted during kharif, 2017-18 and 2018-19 with split plot design in clay soils of Regional Agricultural Research Station, Lam, Guntur-34. The experiment consisting of six treatments and each treatment replicated thrice. The main plots treatments consisting of two dates of sowings viz., mid-July & mid-August and sub-plot treatments consisting of cropping systems viz., cotton sole crop, pigeonpea sole crop and cotton + pigeonpea in 1:1 ratio. Heat Use Efficiency (HUE), Heliothermal use efficiency (HTUE), Radiation Use Efficiency (RUE) and Rain Water Use Efficiency (RWUE) were calculated to know the impact of these indices on crop yield under rainfed conditions. The pooled mean of the experimental results revealed that HUE, RWUE were significantly influenced by sowing dates, and crops, between the sowing dates, mid-August sown recorded highest HUE of 0.612 Kg ha-1°C-1 and RWUE of 8.731 kg ha-1mm-1. Among the crops Cotton+pigeonpea in 1:1 ratio also significantly influenced by HUE, HTUE, RUE and RWUE and the findings revealed that Cotton+pigeonpea in 1:1 ratio recorded maximum yield (cotton equivalent yield=1894.0 kg ha-1) and also highest HUE (0.666 Kg ha-1°C-1), HTUE (0.125 Kg ha-1°C-1 22. hr-1), RUE (0.601mJm-1) and RWUE (7.594kg ha-1mm-1) during the cropping seasons.
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