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The experiment was conducted at the research farm of ICAR- Central Coastal Agricultural Research Institute, Goa, India during 2016–2019 to estimate the crop water requirement (CWR) of pineapple during different growth stages and compare the pineapple crop performance and economic viability at different irrigation systems. Crop water requirement of pineapple was calculated based on the consolidated weather data of 14 years and crop evapotranspiration (ETc) of pineapple at different growth stages using Penman-Montieth equation using CROPWAT 8.0 software. In the experiemtal location, maximum crop evapotranspiration was found in the month of May (81 mm month-1) and the minimum was in the month of July (25 mm month-1). Crop water requirement was the highest in April (0.67 litre day-1 plant-1). During the period of monsoon, irrigation was withdrawn due to sufficienct soil moisture situation. Performance of pineapple crop under different systems of irrigation viz., surface irrigation, drip irrigation and drip fertigation was studied and found that the highest plant height (76.90 cm), D leaf width (5.45 cm), number of leaves (43), D leaf weight (150.3 g) and fruit weight (2.35 kg) were in drip fertigation. An estimated yield of 96.80 t ha-1 was recorded under drip fertigation treatment followed by drip irrigation (90.99 t ha-1) and surface irrigation (76.45 t ha-1) treatments. The cost economics analysis of pineapple production under different treatments revealed that the highest gross returns (` 14.5 lakhs), net returns (` 7.9 lakhs) and B:C ratio (1.2) were in drip fertigation treatment. Adoption of drip fertigation system in pineapple crop under west coast agro-climatic conditions of Goa is helpful to enhance the crop growth and yield of pineapple and fetch good economic returns.

A study was undertaken to establish the annual trend in climatic variables of the Betwa basin located in Central India. District wise daily data (1971–2007) of rainfall, maximum and minimum temperature, relative humidity and wind speed were analysed using Mann-Kendall test and Sen’s slope estimator. The annual rainfall in majority of the districts showed non-significant decreasing trend. Maximum temperature exhibited significant increasing trend in nine out of 14 districts, whereas minimum temperature exhibited significant increasing trend in only four districts. Relative humidity has increased significantly in Bhopal and Jhansi districts, whereas wind speed has significantly decreased in Bhopal, Jhansi, Tikamgarh and Vidisha districts. Decrease in the rainfall varied from 0.674 to 6.46 mm/year which was insignificant. The increase in mean daily maximum and minimum temperature varied from 0.014–0.022°C/year and 0.015–0.024°C/year, respectively. Significant increase in relative humidity was in the range of 0.18–0.34% per year, whereas decrease in the wind speed varied from -0.053 to -0.186 km/h/year. Results of the trend analysis indicated spatial variability in the changes in the different climatic variables.These results will be useful for planning appropriate water management strategies, agricultural crop planning, and preparing location specific adaptation measures.