Study of crop-weather relationship and its impact on growth and yield of chickpea (Cicer arietinum L.) in mollisol of Uttarakhand
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Date
2008-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
For the present study, the experiments were conducted at the Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar with the objectives for quantifying evapotranspiration losses and the effects of temperature and relative humidity on the canopy of chickpea under tarai conditions, and to select some suitable mathematical methods based on meteorological parameters for estimating ET from chickpea. Evapotranspiration of chickpea was measured with weighing type lysimeter. Data on pan evaporation measured with USWB class A pan evaporimeter and chickpea parameters for the corresponding period were collected from Meteorological observatory. Evapotranspiration from chickpea was also estimated by using mathematical methods of Thornthwaite, Turc, StephensStewar, Jensen-Haise, Blaney-Criddle and modified Penman. Higher growing degree days 1810.4 was observed during 2005-06. Air temperature profiles at different stages indicate that temperature inside the crop canopy was lower than above canopy. The yield per hectare was higher during 2005-06 in comparison to 2006-07 due to favourable weather condition in 2005-06. Evapotranspiration of chickpea during 2005-06 and 2006-07 are about 416.5 and 475.6 mm, respectively. The average total rainfall during 2005-06 and 2006-07 were 18.2 and 275 mm, respectively. Thus, supplementary irrigation was required during crop season due to low rainfall. As the pan evaporation did not give accurate estimate of ET, both on seasonal and as well as weekly basis. Thus, the pan evaporation does not seem to be good criterion for the estimation of ET. Modified Penman method was found to be most very suitable for estimation of ET in tarai region of Uttarakhand.
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Agrometeorology