Effects of biochar applicaton on soil properties and production of radish on loamy sand soil / Sandeep Timilsina in Journal of Agriculture and Forestry University, Volume 1 (2017)  

Public ISBD [article]  inJournal of Agriculture and Forestry University > Volume 1 (2017) . - 103-111 p. Title : Effects of biochar applicaton on soil properties and production of radish on loamy sand soil Material Type: printed text Authors: Sandeep Timilsina, Author ; B. R. Khanal, Author ; S. C. Shah, Author ; C. P. Shrivastav, Author ; A. Khanal, Author Publication Date: 2017 Article on page: 103-111 p. Languages : English (eng) Keywords: Pyrolysis, nutrients, soil management Abstract: A field experiment was conducted to assess the effects of biochar application on soil properties and production of Radish (Raphanus sativus L.) on loamy sand soil. The experiment was conducted using a Randomized Complete Block Design (RCBD) with five levels of biochar (0, 5, 10, 15 and 20 Mg ha-1), each replicated for four times. The application of biochar significantly increased the biomass, root and shoot yields of radish. The soil organic matter, soil bulk density, total nitrogen, available phosphorus and available potassium contents of soil also significantly increased with the addition of biochar; however, the pH of the soil did not differ significantly, but increased with increasing rates of biochar application. The highest soil organic matter, total nitrogen, available phosphorus, and available potassium contents of soil and biomass, root and shoot yields of radish were obtained from 20 Mg ha-1 application of biochar and the lowest soil bulk density was obtained from the same level of biochar application. Biochar application to soil would be of immense value to improve soil and plant productivity. Link for e-copy: https://afu.edu.np/sites/default/files/Effects_of_biochar_applicaton_on_soil_pro [...] [article] Effects of biochar applicaton on soil properties and production of radish on loamy sand soil [printed text] / Sandeep Timilsina, Author ; B. R. Khanal, Author ; S. C. Shah, Author ; C. P. Shrivastav, Author ; A. Khanal, Author . - 2017 . - 103-111 p. Languages : English (eng) in Journal of Agriculture and Forestry University > Volume 1 (2017) . - 103-111 p. Keywords: Pyrolysis, nutrients, soil management Abstract: A field experiment was conducted to assess the effects of biochar application on soil properties and production of Radish (Raphanus sativus L.) on loamy sand soil. The experiment was conducted using a Randomized Complete Block Design (RCBD) with five levels of biochar (0, 5, 10, 15 and 20 Mg ha-1), each replicated for four times. The application of biochar significantly increased the biomass, root and shoot yields of radish. The soil organic matter, soil bulk density, total nitrogen, available phosphorus and available potassium contents of soil also significantly increased with the addition of biochar; however, the pH of the soil did not differ significantly, but increased with increasing rates of biochar application. The highest soil organic matter, total nitrogen, available phosphorus, and available potassium contents of soil and biomass, root and shoot yields of radish were obtained from 20 Mg ha-1 application of biochar and the lowest soil bulk density was obtained from the same level of biochar application. Biochar application to soil would be of immense value to improve soil and plant productivity. Link for e-copy: https://afu.edu.np/sites/default/files/Effects_of_biochar_applicaton_on_soil_pro [...]

Forest land prone to more soil erosion than cultivated land in the Chure hill of eastern Chitwan, Nepal / B. Oli in Journal of Agriculture and Forestry University, Volume 4 (2020)  

Public ISBD [article]  inJournal of Agriculture and Forestry University > Volume 4 (2020) . - 183-195 p. Title : Forest land prone to more soil erosion than cultivated land in the Chure hill of eastern Chitwan, Nepal Material Type: printed text Authors: B. Oli, Author ; B. R. Khanal, Author ; C. P. Shrivastav, Author ; Lamichhane, Saurav, Author ; R. B. Ojha, Author Publication Date: 2020 Article on page: 183-195 p. Languages : English (eng) Keywords: ArcGIS, remote sensing, RUSLE, watershed Abstract: This study was done at Lothar-Pampha Watershed, located in the Chure hill of eastern Chitwan, inside the boundary of Rapti Municipality covering 121.83 km2 (12183.12 ha). The main objective of the study was to estimate the spatial distribution and the extent of soil erosion in the watershed using Geographic Information System (GIS) and Remote Sensing (RS) tool. Annual average soil loss was estimated by using the Revised Universal Loss Equation (RUSLE), RSdata using GIS platform, taking spatial variation of each factors. Data on Rainfall erosivity (R), Soil erodibility (K), slope length and steepness (LS), cover crops (C) and soil conservation practices (P) were calculated from laboratory analysis and also retrieved from Landsat image. Soil sample were taken to determine the K factor from the 71 different areas inside the research boundary of Rapti Municipality. Rainfall data of 21 years from 21 different nearby stations were taken from the Department of Hydrology and Meteorology, Nepal (DHM). The soil erosion was categorized into seven classes as, extremely severe (>190 t ha-1 year-1), very severe (100-190 t ha-1 year-1), severe (50-100 t ha-1 year-1), high (10-50 t ha-1 year-1), moderate (5-10 t ha-1 year-1), slightly (2-5 t ha-1 year-1), and very slightly (0-2 t ha-1 year-1) that occurred in 0.0043 %, 0.0862 %,0.98 %,29.71 %,18.34 %,13.54 %, and 37.31 % of total area of Lothar-Pampha watershed, respectively. The total soil erosion estimated from the forest area (70.11 %) was 89537.29 t year-1whereas from grasslands area (0.25 %) it was estimated as 81.03 t year-1, and from the agricultural land (18.10 %) it was 1529.52 t year-1. The maximum erosion rate (275.36 t ha-1 year-1) was estimated in the forest area followed by grasslands (22.19 t ha-1 year-1). Average soil erosion rate in settlement area was estimated as 0.27 t ha-1 year. Likewise, 8.87 % of total erosion was estimated from the agricultural land. Forested land is seemingly contributing to more soil erosion than agricultural land due to steep land topography, poor conservation program, deforestation, and unscientific forest management practices which seek for scientific forest management plan including soil conservation measures such as grass waterways, terracing, contouring, strip-cropping in Lothar-Pampha watershed of the Chure range. Link for e-copy: https://afu.edu.np/sites/default/files/Forest%20land%20prone%20to%20more%20soil% [...] [article] Forest land prone to more soil erosion than cultivated land in the Chure hill of eastern Chitwan, Nepal [printed text] / B. Oli, Author ; B. R. Khanal, Author ; C. P. Shrivastav, Author ; Lamichhane, Saurav, Author ; R. B. Ojha, Author . - 2020 . - 183-195 p. Languages : English (eng) in Journal of Agriculture and Forestry University > Volume 4 (2020) . - 183-195 p. Keywords: ArcGIS, remote sensing, RUSLE, watershed Abstract: This study was done at Lothar-Pampha Watershed, located in the Chure hill of eastern Chitwan, inside the boundary of Rapti Municipality covering 121.83 km2 (12183.12 ha). The main objective of the study was to estimate the spatial distribution and the extent of soil erosion in the watershed using Geographic Information System (GIS) and Remote Sensing (RS) tool. Annual average soil loss was estimated by using the Revised Universal Loss Equation (RUSLE), RSdata using GIS platform, taking spatial variation of each factors. Data on Rainfall erosivity (R), Soil erodibility (K), slope length and steepness (LS), cover crops (C) and soil conservation practices (P) were calculated from laboratory analysis and also retrieved from Landsat image. Soil sample were taken to determine the K factor from the 71 different areas inside the research boundary of Rapti Municipality. Rainfall data of 21 years from 21 different nearby stations were taken from the Department of Hydrology and Meteorology, Nepal (DHM). The soil erosion was categorized into seven classes as, extremely severe (>190 t ha-1 year-1), very severe (100-190 t ha-1 year-1), severe (50-100 t ha-1 year-1), high (10-50 t ha-1 year-1), moderate (5-10 t ha-1 year-1), slightly (2-5 t ha-1 year-1), and very slightly (0-2 t ha-1 year-1) that occurred in 0.0043 %, 0.0862 %,0.98 %,29.71 %,18.34 %,13.54 %, and 37.31 % of total area of Lothar-Pampha watershed, respectively. The total soil erosion estimated from the forest area (70.11 %) was 89537.29 t year-1whereas from grasslands area (0.25 %) it was estimated as 81.03 t year-1, and from the agricultural land (18.10 %) it was 1529.52 t year-1. The maximum erosion rate (275.36 t ha-1 year-1) was estimated in the forest area followed by grasslands (22.19 t ha-1 year-1). Average soil erosion rate in settlement area was estimated as 0.27 t ha-1 year. Likewise, 8.87 % of total erosion was estimated from the agricultural land. Forested land is seemingly contributing to more soil erosion than agricultural land due to steep land topography, poor conservation program, deforestation, and unscientific forest management practices which seek for scientific forest management plan including soil conservation measures such as grass waterways, terracing, contouring, strip-cropping in Lothar-Pampha watershed of the Chure range. Link for e-copy: https://afu.edu.np/sites/default/files/Forest%20land%20prone%20to%20more%20soil% [...]