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Papers by Subash Dahal
Understanding Climate Change: Some Case Studies, 2012
Climatic complexity, agriculture based economy, marginality and topographical adversity of hilly... more Climatic complexity, agriculture based economy, marginality and topographical
adversity of hilly region of Nepal makes it the most vulnerable area to the impacts of
climate change. A survey was carried out in 50 households of Makalu and Pathivara
VDCs of Sankhuwasabha district in 2010 to assess the impacts of climate change in
the livelihoods of people living these areas. This study examined the consistency of
local peoples’ perception about climate change with climate observation data
recorded by meteorological stations. It documented the local adaptation measures
using a semi structured questionnaire. Data on climate parameters and productivity
of major crops were collected from the Department of Hydrology and Meteorology
and Central Bureau of Statistics. Almost all respondents reported changes in climate
and farming system in their locality. Respondents experienced erratic rainfall
pattern, decreased length of winter, increased frequency and length of droughts
associated with decrease in water sources in recent years. The analysis of climatic
data showed similar results. Landraces of many crops had disappeared and new
invasive weeds had appeared. Farmers were forced to adopt new cultivars and
change in planting time to adapt with changing conditions. Incidence of human,
plant and animal diseases and natural hazards in recent years are major threats to
livelihood. The linear trend line of productivity of rice indicates decreasing
productivity. Analysis of climate data of Sankhuwasabha district showed 0.0340C
increase in maximum temperature and 0.0480C decrease in minimum temperature
per year in past 22 years. Precipitation has shown decreasing trend and erratic
pattern. The correlations between temperature and productivity of rice, wheat and
maize were significant. The study showed that people started adaptation measures
autonomously. Adoption of new crop varieties, construction of stone walls and local
irrigation canals and cultivation of some cash crops were the major adaptation
measures observed.
A study was carried out to standardize nitrogen application at different stages of tuberose (Poli... more A study was carried out to standardize nitrogen application at different stages of tuberose (Polianthes tuberosa L.) (cv. Double) for improving growth, flowering and vase life in a farmer’s field at Gunjanagar VDC, Chitwan, Nepal, during May to September, 2012. The experiment was laid out in randomized complete block design with 10 treatments of nitrogen in split doses and replicating thrice. The cut flower and vase life characteristics of tuberose were studied and the economics of production was also analysed. Significant difference was found between treatments of split doses of nitrogen in flowering and post-harvest characteristics of this flower. Three equal split doses of nitrogen, 33% N basal + 33% N at 30 days after planting + 33% N at 50 days after planting resulted in the earliest spike initiation (60 days) and the first flower opening (95.17 days). The same treatments recorded longest vase life (16.47 days). The longest (91.69 cm), heaviest (87.97g) and thickest (0.89 cm) spikes with longest rachis (38.77 cm) were produced by three equal split doses of nitrogen, 33% N basal + 33% N at 50 days after planting + 33% N at 70 days after planting. The same treatments produced maximum net income (NRs. 214,250/-) and benefit-cost (B:C) ratio (1.29) per hectare. Thus, three equal split doses of nitrogen, 33% N basal + 33% N at 50 days after planting + 33% N at 70 days after planting are appropriate for commercial cultivation of tuberose in Nepal.
Teaching Documents by Subash Dahal
Drafts by Subash Dahal
There is increasing global trend of demand for livestock products (due to increasing population),... more There is increasing global trend of demand for livestock products (due to increasing population), and rate of increase in demand is very high in developing countries due to the increase in income level. This trend will exert pressure in the limited arable land present in earth, thus a livestock production system that is socially, economically and environmentally suitable production system should be developed to meet that demand.
While assessing the sustainability of a pasture-based livestock system, all the factors of sustainability (social, economic and environmental) should be considered as a whole.
Understanding Climate Change: Some Case Studies, 2012
Climatic complexity, agriculture based economy, marginality and topographical adversity of hilly... more Climatic complexity, agriculture based economy, marginality and topographical
adversity of hilly region of Nepal makes it the most vulnerable area to the impacts of
climate change. A survey was carried out in 50 households of Makalu and Pathivara
VDCs of Sankhuwasabha district in 2010 to assess the impacts of climate change in
the livelihoods of people living these areas. This study examined the consistency of
local peoples’ perception about climate change with climate observation data
recorded by meteorological stations. It documented the local adaptation measures
using a semi structured questionnaire. Data on climate parameters and productivity
of major crops were collected from the Department of Hydrology and Meteorology
and Central Bureau of Statistics. Almost all respondents reported changes in climate
and farming system in their locality. Respondents experienced erratic rainfall
pattern, decreased length of winter, increased frequency and length of droughts
associated with decrease in water sources in recent years. The analysis of climatic
data showed similar results. Landraces of many crops had disappeared and new
invasive weeds had appeared. Farmers were forced to adopt new cultivars and
change in planting time to adapt with changing conditions. Incidence of human,
plant and animal diseases and natural hazards in recent years are major threats to
livelihood. The linear trend line of productivity of rice indicates decreasing
productivity. Analysis of climate data of Sankhuwasabha district showed 0.0340C
increase in maximum temperature and 0.0480C decrease in minimum temperature
per year in past 22 years. Precipitation has shown decreasing trend and erratic
pattern. The correlations between temperature and productivity of rice, wheat and
maize were significant. The study showed that people started adaptation measures
autonomously. Adoption of new crop varieties, construction of stone walls and local
irrigation canals and cultivation of some cash crops were the major adaptation
measures observed.
A study was carried out to standardize nitrogen application at different stages of tuberose (Poli... more A study was carried out to standardize nitrogen application at different stages of tuberose (Polianthes tuberosa L.) (cv. Double) for improving growth, flowering and vase life in a farmer’s field at Gunjanagar VDC, Chitwan, Nepal, during May to September, 2012. The experiment was laid out in randomized complete block design with 10 treatments of nitrogen in split doses and replicating thrice. The cut flower and vase life characteristics of tuberose were studied and the economics of production was also analysed. Significant difference was found between treatments of split doses of nitrogen in flowering and post-harvest characteristics of this flower. Three equal split doses of nitrogen, 33% N basal + 33% N at 30 days after planting + 33% N at 50 days after planting resulted in the earliest spike initiation (60 days) and the first flower opening (95.17 days). The same treatments recorded longest vase life (16.47 days). The longest (91.69 cm), heaviest (87.97g) and thickest (0.89 cm) spikes with longest rachis (38.77 cm) were produced by three equal split doses of nitrogen, 33% N basal + 33% N at 50 days after planting + 33% N at 70 days after planting. The same treatments produced maximum net income (NRs. 214,250/-) and benefit-cost (B:C) ratio (1.29) per hectare. Thus, three equal split doses of nitrogen, 33% N basal + 33% N at 50 days after planting + 33% N at 70 days after planting are appropriate for commercial cultivation of tuberose in Nepal.
There is increasing global trend of demand for livestock products (due to increasing population),... more There is increasing global trend of demand for livestock products (due to increasing population), and rate of increase in demand is very high in developing countries due to the increase in income level. This trend will exert pressure in the limited arable land present in earth, thus a livestock production system that is socially, economically and environmentally suitable production system should be developed to meet that demand.
While assessing the sustainability of a pasture-based livestock system, all the factors of sustainability (social, economic and environmental) should be considered as a whole.