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300 results on '"Singh, B.R."'

43. Drying characteristics and prediction of best fitted drying model for coriander leaves

Author

Singh, Sanjay Kumar, Samsher, Singh, B.R., Senger, R.S., Kumar, Pankaj, Amit Kumar Patil, Singh, Sanjay Kumar, Samsher, Singh, B.R., Senger, R.S., Kumar, Pankaj, and Amit Kumar Patil

Abstract

Drying experiments were conducted on coriander leaves as affected by drying methods (solar greenhouse drying and open sun drying), pretreatments (dipping in a solution of magnesium chloride + sodium bicarbonate + potassium metabisulphite, boiled water blanching containing sodium metabisulphite, and untreated), and loading densities (2.0, 2.5 and 3.0 kg/m2). Validity of three commonly used drying models were examined to predict the most suitable drying model for coriander leaves. The increased drying temperature under solar greenhouse dryer (42°C) increases the amount of moisture removal from the coriander leaves and reduces the drying time by increasing the drying rate as compared to open sun drying (29°C), at all the selected levels of pretreatments and loading densities. Chemically treated coriander leaves dehydrated under a solar greenhouse dryer required less drying time than other treated leaves and dried leaves. Nevertheless, drying methods and loading densities had significant effects, while treatment effects were marginal. It was found that reduction of moisture and moisture removal rate per unit time occurred mostly in the falling rate period except some accelerated removal of moisture at the beginning up to 150 minutes. Page's model was found most appropriate for drying coriander leaves among the selected models.

Published
2021

45. Soil aggregate- and particle-associated organic carbon under different land uses in Nepal

Author

Shrestha, B.M., Singh, B.R., Sitaula, B.K., Lal, R., and Bajracharya, R.M.

Subjects
Soil structure -- Research, Humus -- Research, Humus -- Properties, Soils -- Carbon content, Soils -- Research, Soils -- Properties, Earth sciences
Abstract

Soil aggregation is an important process of C sequestration and hence a useful strategy to mitigate the increase in concentration of atmospheric C[O.sub.2]. We studied water stability of soil aggregates (WSA) and soil organic carbon (SOC) associated with aggregates and primary particles in surface (0-10 cm) and subsurface (10-20 cm) layers of cultivated (khet, irrigated lowland, and bari, rainfed upland) and forest lands (dense Shorea forest, degraded forest and shrub land, pine-Shorea forest, Shorea-pine-Schima forest, and Schima-Castanopsis forest) in a mountain watershed of Nepal. Macroaggregates (>2 mm) were abundant in forest soils (41-70%) while microaggregates ( Abbreviations: BD, bulk density; CEC, cation exchange capacity; DF, degraded forest and shrub land; DS, dense Shorea forest; PS, pine-Shorea forest; SC, Schima-Castanopsis forest; SNK, Student-Newman-Kuels test; SOC, soil organic carbon; SOM, soil organic matter; SPS, Shorea-pine-Schima forest; WSA, water stability of soil aggregates.

Published
2007

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