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Not AvailableThe domestic sewage effluent has been assessed for its quality in the Madurai Municipal Corporation, Tamil Nadu, India. The raw sewage samples were collected from 11 discharge points during South West and North East Monsoon, winter and summer seasons during the year 2016. The research revealed that the raw sewage effluent samples were observed neutral to slightly alkaline pH, saline sewage effluent (EC), high Total Suspended Solids and Turbidity. All the eleven sampling points prevailed in the North and South zone of Madurai, were registered highest values of pH, EC, TSS and turbidity during the summer season and lowest values during the North – East monsoon season respectively. The pH ranged from 6.51 to 8.20, EC ranged from 1.20 to 2.92 dSm-1, TSS ranged from 245 to 400 mg L-1 and turbidity ranged from 105 to 240 NTU within the 11 discharge points across the seasons.Not Availabl

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Not AvailableFurrow irrigated raised bed system being proposed for aerobic rice to increase productivity and to save water. Objective of the study were influence of the irrigation regimes and crop geometry on production performance of rice varieties/culture under aerobic condition. Keeping this as view, A field experiment was conducted at Agriculture College and Research Institute, Madurai, TNAU during 2014 and 2015 two consecutive years. The experiment was laid out in split split plot design with three factors viz. furrow irrigated raised bed system with three different levels of irrigation and crop geometry which is tested with six different varieties/cultures. The growth attributes viz. LAI and DMP at flowering stage and yield attributes (number of panicles and number of filled grains panicle-1), grain and straw yield were calculated. In both the years, among the different treatment combinations, the variety MAS IWM Saltol (V6) irrigated once in four days with close spacing of 20 x 10 cm (I1G1V6) recorded significantly higher LAI compared to other combinations. The variety APO1 (V2) irrigated once in four days with close spacing of 20 x 10 cm recorded significantly higher DMP. Among the treatment combinations, I1G1V6 was recorded significantly higher number of panicles/m2 and number of filled grains panicle-1compared to other treatment combinations. The highest grain and straw yield were recorded, variety APO1 grown in spacing of 20 x 10 cm and irrigated once in four days (I1G1V2) which is on par with I1G1V6.Not Availabl

Seasonal variation of paddy straw mushroom performance under different microclimate environments

Maize is an important base crop in intensive irrigated cereal based cropping system because of its wider climatic acclimatization. In contrast, a certain microclimate is needed for commercial mushroom production. Favourable microclimatic condition that prevails in maize field created a greater opportunity to grow the warm loving Paddy Straw Mushroom “Volvariella volvacea” as intercrop. In this context, a comparative study was taken up at Tamil Nadu Agricultural University to determine the performance of paddy straw mushroom as intercrop under different microclimate created in irrigated maize and polyhouse during summer and kharif 2022. Study concluded that the microclimate variables during kharif season was more favourable for obtaining higher straw mushroom yield as maize intercrop, but the summer season was also an economically viable one. The study found that the most ideal limits of microclimate variables such as morning and afternoon temperature, morning and afternoon RH for paddy straw mushroom was 26 to 29oC, 29 to 33oC, 80 to 98 per cent and 66 to 88 per cent, respectively. The polyhouse showed its superiority in providing controlled favourable microclimate for paddy straw mushroom than the fluctuating microclimate under maize canopy, however the higher infrastructural investment in polyhouse farming is not affordable for the small and marginal farmers. The microclimate prevailed in between maize rows could support paddy straw mushroom intercropping as a viable system, which had Land Equivalent Ratio of more than 1.6 and double the time of Crop Equivalent Yield when compare to sole cropped maize

Designing agromet advisories for selected weather windows under automated weather based advisory system in Tamil Nadu – A case study

Research work was undertaken at Agro Climate Research Centre, Tamil Nadu Agricultural University Coimbatore, with the objective of developing agromet advisories for rice crop for 54 independent selected weather windows (SWW) covering eight rice growing seasons/systems of Tamil Nadu. This was done to provide weather-based agromet advisory to the farming community. Weather sensitive rice agromet advisories were developed for its nine stages through group discussions based on rice crop sensitiveness to SWW. The available literature on interaction between rice crop and weather elements at their different threshold levels was also properly considered during this exercise. Proto-type were run for one block of Tamil Nadu and thus problems identified for seeking solutions.