Your search found 8 records
1 McVicar, T. R.; Zhang, G.; Bradford, A. S.; Wang, H.; Dawes, W. R.; Zhang, L.; Lingtao, L. 2000. Developing a spatial information system to monitor regional agricultural water use efficiency for Hebei Province on the North China plain. Canberra, Australia: Commonwealth Scientific and Industrial Research Organisation (CSIRO). 54p.
Water resources ; Water use efficiency ; Monitoring ; Agriculture ; Yields ; Growth period ; Crops ; Maize ; Wheats ; Data ; GIS ; Spatial information / China / Hebei Province
(Location: IWMI HQ Call no: 333.91 G592 MCV Record No: H044213)
http://www.clw.csiro.au/publications/technical2000/tr31-00.pdf
https://vlibrary.iwmi.org/pdf/H044213.pdf
https://vlibrary.iwmi.org/pdf/H044213.pdf
(7.21 MB) (7.21MB)
2 Gleason, J. E.; Tittagalla, N. P. 1992. Report on cultivation census: Mahaweli System B, Yala 1991. Mahaweli Agricultural and Rural Development (MARD) Project. Pimburattewa, Sri Lanka: Ministry of Mahaweli Development. Mahaweli Authority of Sri Lanka. 68p.
Cultivation ; Censuses ; Diversification ; Crop production ; Farm income ; Irrigated land ; Farmers ; Onions ; Chillies ; Growth period ; Projects / Sri Lanka / Mahaweli System B / Mahaweli Project / Pimburattewa
(Location: IWMI HQ Call no: 310.723 G744 GLE Record No: H046314)
(0.07 MB)
3 Izumi, K.; Ranatunga, A. S. 1974. Cost of production of paddy: Maha 1972/73: a study based on farm record books maintained in five selected districts. Colombo, Sri Lanka: Agrarian Research and Training Institute (ARTI). 36p. (ARTI Research Study 12)
Rice ; Production costs ; Land tenure ; Yields ; Manpower ; Fertilizer application ; Farmers ; Growth period ; Case studies / Sri Lanka / Hambantota / Polonnaruwa / Elahera / Kurunegala / Kandy / Colombo
(Location: IWMI HQ Call no: 641.3318 G744 IZU Record No: H046346)
(0.06 MB)
4 Ali, M. Y. 2014. Farming systems of Bangladesh: poverty escape pathways and livelihoods improvement. Dhaka, Bangladesh: Muktochinta Prokashona. 103p.
Farming systems ; Traditional farming ; Living standards ; Poverty ; Agricultural production ; Growth period ; Crop yield ; Rice ; Wheat ; Vegetables ; Potatoes ; Garlic ; Onions ; Grain legumes ; Fisheries ; Shrimp culture ; Coastal area ; Highlands / Bangladesh
(Location: IWMI HQ Call no: 630 G584 ALI Record No: H047181)
(0.35 MB)
5 Mohsenipour, M.; Shahid, S.; Chung, E.-s.; Wang, X.-j. 2018. Changing pattern of droughts during cropping seasons of Bangladesh. Water Resources Management, 32(5):1555-1568. [doi: https://doi.org/10.1007/s11269-017-1890-4]
Drought ; Seasonal variation ; Crops ; Growth period ; Climate change ; Precipitation ; Rain ; Evapotranspiration ; Temperature ; Estimation ; Spatial distribution / Bangladesh
(Location: IWMI HQ Call no: e-copy only Record No: H048511)
(1.45 MB)
There has been a growing concern on temporal variations on drought characteristics due to climate change. This study compares meteorological drought characteristics for two different periods to quantify the temporal changes in seasonal droughts of 18 weather stations of the country. Fifty-five years rainfall and temperature data are divided into two different thirty-year periods, 1961–1990 and 1985–2014 and standardized precipitation evapotranspiration index (SPEI) for those periods are calculated to assess the changes. Four seasons in this study are selected as two major crop growing seasons namely, Rabi (November to April) and Kharif (May to October) and two critical periods for crop growth in term of water supply namely critical Rabi (March–April) and critical Kharif (May). Results show that moderate, extreme, and severe Rabi droughts has increased in 11, 9, and 4 stations out of 18 stations, respectively, and Kharif severe and extreme droughts has increased in 8 and 9 stations, respectively, In addition, the frequency analysis shows that the return periods have decreased during 1985–2014 at the stations where it was high during 1961–1990 and vice versa. This has made the spatial distribution of return periods of droughts more uniform over the country for most of the seasons. Increased return period of droughts in highly drought prone north and northwest Bangladesh has caused decrease in average frequency of droughts. Consequently, this result corresponds that Bangladesh experiences fewer droughts in recent years. Trend analysis of rainfall and temperature data reveals that significant increase of mean temperature and no significant change in rainfall in almost all months have increased the frequency of droughts in the regions where droughts were less frequent.
6 Belay, S. A.; Assefa, T. T.; Prasad, P. V. V.; Schmitter, Petra; Worqlul, A. W.; Steenhuis, T. S.; Reyes, M. R.; Tilahun, S. A. 2020. The response of water and nutrient dynamics and of crop yield to conservation agriculture in the Ethiopian highlands. Sustainability, 12(15):5989. [doi: https://doi.org/10.3390/su12155989]
Conservation agriculture ; Water use ; Nutrient availability ; Crop yield ; Highlands ; Supplemental irrigation ; Conventional tillage ; Irrigation water ; Water management ; Crop management ; Pepper ; Growth period ; Fertilizers ; Phosphorus ; Nitrogen ; Leachates ; Rain ; Runoff ; Evapotranspiration / Ethiopia / Dengeshita
(Location: IWMI HQ Call no: e-copy only Record No: H049873)
(2.48 MB) (2.48 MB)
Smallholder agriculture constitutes the main source of livelihood for the Ethiopian rural community. However, soil degradation and uneven distribution of rainfall have threatened agriculture at present. This study is aimed at investigating the impacts of conservation agriculture on irrigation water use, nutrient availability in the root zone, and crop yield under supplementary irrigation. In this study, conservation agriculture (CA), which includes minimum soil disturbance, grass mulch cover, and crop rotation, was practiced and compared with conventional tillage (CT). We used two years’ (2018 and 2019) experimental data under paired-t design in the production of a local variety green pepper (Capsicum annuum L.). The results showed that CA practices significantly (a = 0.05) reduced irrigation water use (13% to 29%) and runoff (29% to 51%) while it increased percolated water in the root zone (27% to 50%) when compared with CT practices under the supplementary irrigation phase. In addition, CA significantly decreased NO3-N in the leachate (14% to 44%) and in the runoff (about 100%), while PO4-P significantly decreased in the leachate (33% to 50%) and in the runoff (16%) when compared with CT. Similarly, CA decreased the NO3-N load in the leachate and in the runoff, while the PO4-P load increased in the leachate but decreased in the runoff. The yield return that was achieved under CA treatment was 30% higher in 2018 and 10% higher in 2019 when compared with the CT. This research improves our understanding of water and nutrient dynamics in green pepper grown under CA and CT. Use of CA provides opportunities to optimize water use by decreasing irrigation water requirements and optimize nutrient use by decreasing nutrient losses through the runoff and leaching.
7 Molla, T.; Tesfaye, K.; Mekibib, F.; Tana, T.; Taddesse, T. 2020. Rainfall variability and its impact on rice productivity in Fogera Plain, Northwest Ethiopia. Ethiopian Journal of Agricultural Sciences, 30(2):67-79.
Crop production ; Rice ; Rainfall patterns ; Agricultural productivity ; Crop yield ; Growth period ; Temperature ; Dry spells ; Trends / Ethiopia / Fogera Plain / Bahir Dar / Woreta / Maksegnit / Gondar
(Location: IWMI HQ Call no: e-copy only Record No: H050066)
https://www.ajol.info/index.php/ejas/article/view/195132/184317
https://vlibrary.iwmi.org/pdf/H050066.pdf
https://vlibrary.iwmi.org/pdf/H050066.pdf
(0.62 MB) (636 KB)
The objective of this study was to analyze rainfall variability and its impact on rice production in the Fogera Plain. The analysis used historical rainfall and yield data from four stations. Historical daily rainfall and yield data were obtained from the National Meteorology Agency (NMA) and Amhara Regional State Bureau of Agriculture, respectively. The rainfall data were subjected to trend and variability analysis. Partial correlation and multiple regression analyses were used to determine the relationship and impact of rainfall characteristics on rice yield. Results showed a decreasing trend of rainfall amount, shortening of the length of the growing period (LGP), increased the variability of rainfall onset date and dry spell length in the study area. The analysis revealed that dry spell lengths of 5 days (sp5), 7 days (sp7), 10 days (sp10) and 15 days (sp15) varied over the study areas with dry spells getting more prevalent in Woreta and Maksegnit compared to Bahir Dar and Gondar stations. Rice yield was positively and significantly correlated with annual rainfall amount (0.69**), LGP (0.61**), and a number of rainy days (0.59*). On the other hand, rice yield was negatively and significantly correlated with rainfall onset date (-0.693**) and length of a dry spell (-0.62**). Rainfall parameters explained 69% of the rice yield variability. The study indicated the need for managing rainfall variability to increase the productivity of rice in the Fogera Plain.
8 Zhang, Q.; Sun, J.; Zhang, G.; Liu, X.; Wu, Y.; Sun, J.; Hu, B. 2023. Spatiotemporal dynamics of water supply-demand patterns under large-scale paddy expansion: implications for regional sustainable water resource management. Agricultural Water Management, 285:108388. (Online first) [doi: https://doi.org/10.1016/j.agwat.2023.108388]
Water supply ; Water resources ; Water requirements ; Rice ; Growth period ; Climate change ; Precipitation ; Crop water use ; Irrigation water ; Water demand ; Water shortage ; Evapotranspiration / China / Sanjiang Plain / Songhua River / Wusuli River
(Location: IWMI HQ Call no: e-copy only Record No: H051983)
https://www.sciencedirect.com/science/article/pii/S0378377423002536/pdfft?md5=c08be234799e27a6e78d439d8bd87d74&pid=1-s2.0-S0378377423002536-main.pdf
https://vlibrary.iwmi.org/pdf/H051983.pdf
https://vlibrary.iwmi.org/pdf/H051983.pdf
(14.80 MB) (14.8 MB)
Climate change and large-scale paddy field expansion have altered the balance of water supply–demand in the Sanjiang Plain, a substantial commercial grain base in the high-latitude region of China. However, the matching pattern of water supply–demand throughout the growing period during the rapid expansion processes of paddy fields remains unknown. Hence, this study aimed to analyze the spatial–temporal variation characteristics of effective precipitation (Pem), crop water demand (ETc), supply–demand matching degree (MD), and irrigation water demand (IR) for different growing periods of paddy fields in the Sanjiang Plain using high-resolution meteorological and multi-period rice distribution data sets. The results showed that the area of paddy fields increased by 446% (20,064 km2) from 1990 to 2020 and almost completely covered the lowland of the Sanjiang Plain in 2020. ETc showed a slightly increasing trend initially and decreased afterward, while Pem and MD marginally increased at first and considerably increased subsequently during 1990–1995 and 2000–2020, respectively. MD has largely increased since 2000 in the Jiansanjiang area and the lower reaches of the Songhua River, where the largest paddy field expansion was experienced. However, the regional IR increased rapidly after 2000, which was associated with the expansion of paddy fields and further exceeded the carrying capacity of regional water resources. The efficiency of water resource utilization should be urgently improved, and integrated water resource planning and management should be implemented considering precipitation, surface water (regional water resources and transit water resources), and groundwater to promote the sustainable development of regional agriculture.
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