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K. N. Sondarva ¹, H. D. Rank ², P. S. Jayswal ²

Affiliations
1 Agricultural School (JA.U.), Halvad (Gujarat), IN
2 Department of Soil and Water Engineering, College of Agricultural Engineering and Technology, Junagadh Agricultural University, Junagadh (Gujarat), IN

Abstract

A field experiment was conducted at instructional farm of soil and water engg., CAET, JAU, Junagadh during summer season (Feb.-May), 2012 to study the summer sesame response to moisture and thermal regimes with three Factorial Strip Plot Design. The crop was exposed to different thermal regimes by four dates of sowing i.e., 1^st Feb., 14^th Feb., 1^st March and 14^th March with moisture regimes by varying the irrigation interval (3, 4 and 5 days irrigation interval). Results revealed that the seasonal depth of irrigation decreased with delay in sowing from 1^st February and the growing days requirement decreased with delaying sowing after 1^st February. The more number of growing days were required to mature the crop with less total thermal heat unit. The sesame yield is significantly influenced by the thermal regimes. The highest and lowest sesame grain yield of 1131.59 kg/ ha and 555.20 kg/ha was observed for the dates of sowing of 16th February and 1st February, respectively. The grain yield increased rapidly by delaying the sowing from 1^st Feb. to 21^st Feb., then after it decreased slowly and continously. The vegetative stage was found the most sensitive stage to thermal regimes followed by establishment stage, flowering stage, ripening stage and reproductive stage. The highest grain yield of 991.27 kg/ha was found under drip irrigation at 3-days interval which was higher by the tune of 10.33 per cent, 17.32 per cent and 20.86 per cent as compared to that of under 4, 5 days under drip and 7-days under surface irrigation, respectively.

Keywords

Summer, Sesame, Moisture, Thermal Regimes.

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K. N. Sondarva ¹, H. D. Rank ², P. S. Jayswal ³

Affiliations
1 College of Agricultural Engineering and Technology, (N.A.U.) DEDIAPADA (GUJARAT), IN
2 AICRP on Irrigation Water Management, College of Agricultural Engineering and Technology, Junagadh Agricultural University, JUNAGADH (GUJARAT), IN
3 College of Agriculture, (J.A.U.), AMRELI (GUJARAT), IN

Abstract

A field experiment was conducted at instructional farm of soil and water engineering, CAET, JAU, Junagadh during summer season(Feb.-May). The crop was exposed to different moisture regimes by varying the irrigation interval (3, 4 and 5 days irrigation interval) and mulch level (wheat straw mulch @ 5 t/ha and no mulch). It was observed that, sesame yield was significantly influenced by the thermal regimes and moisture regimes by varying water application under drip irrigation. The sesame yield response to seasonal thermal heat units as well as to stage wise thermal heat unit's availabilities could be described well by the quadratic model. The linear form of the model for the yield response to irrigation interval shows that the yield decreases with increase in irrigation interval. The developed model showed that for the 3 days and 4 days irrigation interval, the sesame grain yield increased more rapidly under mulch as compared to no mulch for the lower values of thermal heat units but for the higher values of thermal heat units, the yield decreased more rapidly under mulch as compared to no mulch. The sesame yield response to seasonal irrigation depth could be found linear indicating that the applied water was less than the crop evapotranspirations (ET_c) or the optimal water requirements and yet there is a scope for increasing the yield by increased water application.

Keywords

Mathematical Modelling, Thermal Regimes, Moisture Regimes.

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M. L. Patel ¹, A. M. Parakhia ², N. S. Joshi ¹, H. C. Chhodavadia ¹, P. J. Prajapati ¹, P. S. Jayswal ¹, V. K. Karangiya ¹

Affiliations
1 Krishi Vigyan Kendra, Junagadh Agricultural University, Amreli (Gujarat), IN
2 Junagadh Agricultural University, Junagadh (Gujarat), IN

Abstract

In Amreli district, cotton, groundnut, sesame, wheat, Bajra, castor, sorghum and pulses are main field crops. The project aimed to aware farmers about integrated pest management practices (IPM) to control pink bollworm pest attacking in cotton crop. In Amreli district, majority of farmers are grown cotton in their field. Between last three to four years, attack of this pest became very serious, which leads to heavy loss of yield. Awareness about integrated approach was necessary due to mono cropping situation in Amreli district.

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