Cereal yield stabilization in Terai (Nepal) by water and soil fertility management modeling

Shrestha, N. P.; Raes, Dirk; Vanuytrecht, Eline; Sah, Shrawan Kumar

doi:10.1016/j.agwat.2013.03.003

Cited by 64 publications

(26 citation statements)

References 29 publications

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“…In hills of Nepal, farmers are generally not aware of existing technologies or have limited understanding about their benefits and costs even for the most basic management interventions; in part this is caused by an evidence-based knowledge gaps that remain to be addressed through strategic and on-farm research. As a consequence, there is low and unbalanced (<20:5:0 kg NPK ha −1 ) use of fertilizers (Adhikari, 2000;Shrestha et al, 2013;Tiwari et al, 2004) and very limited adoption of hybrid maize (Tiwari et al, 2009).…”

Section: Introductionmentioning

confidence: 98%

Decomposing maize yield gaps differentiates entry points for intensification in the rainfed mid-hills of Nepal

Devkota

McDonald²,

Khadka³

et al. 2015

Field Crops Research

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Section: Introductionmentioning

confidence: 98%

Decomposing maize yield gaps differentiates entry points for intensification in the rainfed mid-hills of Nepal

Devkota

McDonald²,

Khadka³

et al. 2015

Field Crops Research

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“…Based on the data obtained from 80 households (Table 4), it is revealed that the 700 houses generate about 1374 kg of biodegradable solid waste per day. This is enough raw material to fuel 15 plants of 10 cubic meters, each of which can theoretically generate 15 x 10 x 2,400 = 360,000 litters of biogas daily [11,30]. However, there are other factors which prevent generation of biogas, such as money and installation of a biogas digester.…”

Section: Resultsmentioning

confidence: 99%

“…The melting of ice and glaciers in mountains makes the country as a whole more sensitive to climate change [8][9][10]. The country's economy which mainly depends on agriculture cannot produce enough food because of erratic rainfall [11]. Therefore, the change in precipitation creates a significant negative impact on the livelihoods of people [10].…”

mentioning

confidence: 99%

Prioritization of Environmental Issues Based on Surveys Applied to a Settlement in Nepal

Aryal¹

2015

IJEP

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Abstract-In developing countries, such as Nepal, the expansion of cities produces parallel growth of large informal settlements, in which aspects the qualities of life are threatened. This study focuses on prioritizing 6 different environmental issues (Health and sanitation, Water availability, Solid waste disposal, Food, Flood and Transportation) observed in one informal settlement. Two focus group discussions were conducted, one with 12 and the other with 14 participants. One hundred and twenty respondents (out of 700 households) were selected through proportional stratified sampling based on gender and age strata. Water shortage was found to be the major environmental issue in the settlement. The study describes the livelihood challenges in the settlement, such as water shortages, solid waste disposal, health and sanitation. It also proposes alternative solutions for managing the enclave's infrastructure, while addressing changing climate.

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“…The models' crop parameters (Online Resource 4) were calibrated for the study area and subsequently validated against independent subsets of field data (including soil water content, crop canopy cover, phenology, biomass and yield throughout the season) collected on farmers' fields between 1999 and 2010 (Vanuytrecht 2013). Calibration included consecutively comparing simulations with observations, updating model parameters and improving the models' performance.…”

Section: Model Calibrationmentioning

confidence: 99%

“…AquaCrop is a point-based, water-driven model that has been widely used (Stricevic et al 2011;Abrha et al 2012;Mkhabela and Bullock 2012;Shrestha et al 2013;Mhizha et al 2014) and allows simulation under future conditions, including elevated [CO 2 ] . Impacts for winter wheat were assessed with the Sirius model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Raes et al (2009) and Jamieson et al (1998), respectively.…”

Section: Impact Assessmentmentioning

confidence: 99%

Regional and global climate projections increase mid-century yield variability and crop productivity in Belgium

2015

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The impact of mid-century climatic changes on crop productivity of winter wheat, maize, potato and sugar beet was assessed for a temperate maritime climate in the Flemish Region, Belgium. Climatic projections of multiple regional and global climate models (RCMs from the EU-ENSEMBLES project and GCMs from the Coupled Model Intercomparison Project phase 3) were stochastically downscaled by the LARS-WG weather generator for use in the crop models AquaCrop and Sirius. Primarily positive effects on mean yield were simulated. Crops benefitted from elevated CO 2., and from more radiation interception if the cropping period was adapted in response to higher temperatures. However, increased productivity was linked with increased susceptibility to water stress and greater inter-annual yield variability, particularly with adapted management. Impacts differed among and within ensembles of climate models, and among crops and environments. Although RCMs may be more suitable for local impact assessments than GCMs, inter-ensemble differences and contingent wider ranges of impacts with GCM projections found in this study indicate that applying RCMs driven by a limited number of GCMs alone would not give the full range of possible impacts. Further, this study suggests that the simulated inter-model variation can be larger than spatial variation within the region. These findings advocate the use of both GCM and RCM ensembles in assessments where temperature and precipitation are central, such as for crop production.

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Cereal yield stabilization in Terai (Nepal) by water and soil fertility management modeling

Cited by 64 publications

References 29 publications

Decomposing maize yield gaps differentiates entry points for intensification in the rainfed mid-hills of Nepal

Decomposing maize yield gaps differentiates entry points for intensification in the rainfed mid-hills of Nepal

Prioritization of Environmental Issues Based on Surveys Applied to a Settlement in Nepal

Regional and global climate projections increase mid-century yield variability and crop productivity in Belgium

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