Effect of harvesting time on yield and milling quality of upland rice

A field experiment on two varieties (Sathi 34-36 and GR-5) of upland drilled rice was conducted during kharif seasons of years I 993 to 1995 on sandy loam soil of middle Gujarat. The crop was harvested at 28 days, 35 days and 42 days after 50% flowering. The influence of date of harvesting and variety on grain yield and milling quality of rice was studied. The maximum grain yield (1282 kg/ha) with the highest head yield of rice (47.02%) was achieved when var. GR-5 was harvested at 35 days after 50% flowering stage. Harvesting at 35 days after 50% flowering of variety GR-5 gave 45.1% more grain yield and 11.19% more rice recovery as cory1pared with harvesting at 42 days after 50% flowering in var. Sathi 34-36

Effect of Open and Closed Drying on The Quality of Parboiled Rice

Paddy was dried under shade. sun and mechanical dryer using hot air at 60 °, 80° and 90 °C and under vacuum employing a temperature of 120°, 150° and 180°C. The quality parameters like the milling breakage. the water upteke of milled rice at room temperature till saturation (EMC-S) and that of parboiled paddy soon after parboiling but before drying (immediate EMC-S), the colour of milled rice and the cooking time were determined. Parboiled paddy could be dried to mill-able condition in 15-20 min. time under the vacuum drying conditions employed and without affecting its colour, milling, hydration and cooking characteristics. &nbsp

Climate Linked Variations in Blue and Green Water Footprints of Major Vegetable Crops Cultivated in Eastern Gangetic Plains of India

Increased climatic variability is impacting agriculture in different ways, including water demands and availability. Present study analyses the impact of changing future climatic conditions on Water Footprints (WF) of major vegetable crops (cabbage, tomato and potato) grown in Eastern Gangetic Plains (EGP), covering the states of West Bengal, Bihar and Jharkhand, of India. A daily soil water balance model was developed to assess the blue and green water use of three major vegetable crops in EGP. The model was employed to assess the average blue and green water use at daily time step for periods pertaining to baseline (2008-2018), early (2030-31), mid (2050-51) and late (2080-81) 21st century, under different future climate scenarios of RCP2.6, RCP4.5, RCP6.0 and RCP8.5. The study also considered yield variations of these crops under future scenarios considering the monotonic trend models. It was observed that, under baseline scenario, the WF of cabbage, potato and tomato in the study area were 481.2, 2689.2 and 434.9 Mm3 yr-1, respectively. It was predicted that, across all the climate change scenarios and time scales, the green and blue WF of cabbage would increase by 2.75% to 6.88%, whereas in case of potato, the increase was in the range of 9.64% to 15.37%. Across all the climate scenarios and time scales, the variations in WF of tomato were projected to be comparatively lower (-3.95% to 1.37%). Looking at blue and green components, the green WF of cabbage production is likely to decrease in the range of 2.5% to 14.22% under different time scales and climate change scenarios. The green WFs of potato and tomato were projected to increase by 56.49% to 221.62% and 31.31% to 110.14%, respectively. The blue WF of cabbage would increase by 13.34% to 25.87%, while that of tomato was projected to decrease by 9.41% to 26.13%. The blue WF of potato was projected to vary in the range of -4.91% to 7.1% in future. The study clearly highlights increase in blue WF of vegetable crops underlining increased irrigation water demands under future climatic scenarios. This also calls for improving infrastructure to achieve efficient water use and better management of available water resources

Comparative Performance of Trickle Irrigation and Different Subsurface Irrigation Systems for Tomato

Higher yield and higher water use efficiency were obtained in subsurface irrigation as compared to tickle irrigation. The perforated pipe and filter caillary irrigation with filter capsules of 1 : 2 clay and dune sand ratio performed better than water table irrigation system. The installation and operator of perforated pipe and filter capillary irrigation systems was problematic. The water table irrigation system yield and water use efficiency were 87 and 72% that of the highest value respectively. The installation and operation of the Witter table irrigations system was simpler. The soil salinity upto 0.82 ds/m did not cause adverse affect. High temperature at the time of planting coupled with higher soil salinity resulted into marked reduction in yield under trickle irrigation

Development of Production Technique for Crystalline Parboiled Rice

Paddy subjected to hydro-thermal treatments at lower Temperature/pressure resulted in best milling and cooking quality and looked purely crystalline. Addition of fat solvents during polishing was found to be advantageous for imparting more translucency to the final produc

Research Note Perspectives in Agricultural Engineering

Perspectives in Agricultural Engineerin

Development and Evaluation of Grain Yield Monitoring System

An yield monitor was developed by assembling the designed and selected components such as auxiliary tank, singl