Analysis of Meteorological Drought Pattern During Different Climatic and Cropping Seasons in Bangladesh

We assessed the changes in meteorological drought severity and drought return periods during cropping seasons in Afghanistan for the period of 1901 to 2010. The droughts in the country were analyzed using the standardized precipitation evapotranspiration index (SPEI). Global Precipitation Climatology Center rainfall and Climate Research Unit temperature data both at 0.5° resolutions were used for this purpose. Seasonal drought return periods were estimated using the values of the SPEI fitted with the best distribution function. Trends in climatic variables and SPEI were assessed using modified Mann–Kendal trend test, which has the ability to remove the influence of long-term persistence on trend significance. The study revealed increases in drought severity and frequency in Afghanistan over the study period. Temperature, which increased up to 0.14 °C/decade, was the major factor influencing the decreasing trend in the SPEI values in the northwest and southwest of the country during rice- and corn-growing seasons, whereas increasing temperature and decreasing rainfall were the cause of a decrease in SPEI during wheat-growing season. We concluded that temperature plays a more significant role in decreasing the SPEI values and, therefore, more severe droughts in the future are expected due to global warming.

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Characteristics of meteorological drought pattern and risk analysis for maize production in Xinjiang, Northwest China

Theoretical and Applied Climatology ◽

10.1007/s00704-017-2259-6 ◽

2017 ◽

Vol 133 (3-4) ◽

pp. 1269-1278 ◽

Cited By ~ 4

Author(s):

Cheng Li ◽

Ranghui Wang ◽

Husen Ning ◽

Qinghong Luo

Keyword(s):

Risk Analysis ◽

Meteorological Drought ◽

Northwest China ◽

Maize Production ◽

Drought Pattern

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Lowland Rice Yield as Affected by Straw Incorporation and Inorganic Fertilizer Over Cropping Seasons in Fluvisol

JOURNAL OF ADVANCES IN AGRICULTURE ◽

10.24297/jaa.v3i1.5409 ◽

2014 ◽

Vol 3 (1) ◽

pp. 129-141

Author(s):

Brahima Koné ◽

Zadi Florent ◽

Gala bi Trazié Jeremie ◽

Akassimadou Edja Fulgence ◽

Konan Kouamé Firmin ◽

...

Keyword(s):

Grain Yield ◽

Rice Variety ◽

Mineral Fertilizer ◽

Lowland Rice ◽

Inorganic Fertilizer ◽

Cropping Season ◽

Significant Difference ◽

Straw Incorporation ◽

Cropping Seasons ◽

Fertilizer Effect

Grain yield stabilization of lowland rice over cropping seasons was explored using different compositions of inorganic fertilizers (NPK, NPKCa, NPKMg, NPKZn, NPKCaMg, NPKCaZn and NPKCaMgZn) and straw incorporation (3, 6, 9, 12 and 15 tha-1 ). No fertilizer and no straw amended plot was the control in a split-plot design with three replications laid in a Fluvisol of Guinea savanna in Centre Cote d’Ivoire. Three weeks old nursery rice variety NERICA L19 was transplanted. No significant difference of grain yield was observed between the different treatments excluding the highest yields recorded for treatments NPKMg (5.09 tha-1 ), NPKZn (5.15 tha-1 ) and NPKCaéMg (5.31 tha-1 ) compared with 12 (3.95 tha1 ) and 15 tha-1 (4.14 tha-1 ) as straw rates respectively. Grain yield declining trend was more pronounced for mineral fertilizer treatments showing twice greater depressive effect of cropping cycle compared with the straw especially, for treatments characterized by highest grain yield in the first cropping season and similar grain yields were recorded for both sources of nutrient in the third cropping cycle. Of slowness of nutrients releasing by straw, highest grain yield was expected for this soil amender within a longer period of cultivation whereas, unbalance soil micronutrients should be relevant to studious declining yield under inorganic fertilizer effect. Nevertheless, the straw rate of 12 tha-1 supplying 0.58% of NPK as mineral fertilizer equivalent can be recommended for sustaining lowland rice production in the studied agro-ecosystems unless for three cropping seasons.

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Agronomic performance of autumn- and winter-cropped Indian mustard (Brassica juncea L.) in response to varying levels of nitrogen fertiliser

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae ◽

10.24917/25438832.5.6 ◽

2020 ◽

pp. 83-95

Author(s):

Bent Al-Hoda Asghari ◽

Mohsen Yousefi ◽

Katarzyna Możdżeń ◽

Joanna Puła ◽

Peiman Zandi ◽

...

Keyword(s):

Brassica Juncea ◽

Seed Yield ◽

Agronomic Traits ◽

Growth Parameters ◽

Indian Mustard ◽

Climatic Conditions ◽

Plant Seed ◽

Nitrogen Fertiliser ◽

Nitrogen Levels ◽

Cropping Seasons

Indian mustard (Brassica juncea L. Czern) cultivation is suggested for regions with short seasons and low rainfall. Although there have been many studies conducted on agronomic production of mustard in Iran, the information regarding the interactive impact of cropping seasons and nitrogen fertiliser on growth characteristics and yield quality of mustard plant is still insufficient and requires further investigation. This study focused on the possible implications of different cropping seasons and different nitrogen levels on selected agronomic traits in mustard. In this experiment, five different doses of nitrogen and two sowing periods were used to assess for their combined effects on the growth parameters, seed yield and agronomic characteristics of mustard in the semi-arid climatic conditions of Takestan. The results revealed that cultivation seasons and nitrogen rates had a significant effect on plant height, biomass yield, number of siliques per plant, seed oil content and seed yield.

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Satellite Data Based Soil Water Index as a Tool to Monitor Droughts and Agricultural Crisis -An Example of Yavatmal District, Maharashtra, India

Remote Sensing of Land ◽

10.21523/gcj1.20040102 ◽

2020 ◽

Vol 4 (1-2) ◽

pp. 12-18

Author(s):

Vijendra Boken

Keyword(s):

Soil Water ◽

Satellite Data ◽

Suicide Rate ◽

Crop Yields ◽

Meteorological Drought ◽

Agricultural Drought ◽

Coefficient Of Correlation ◽

Water Index ◽

Farmer Suicides ◽

June July

Yavatmal is one of the drought prone districts in Maharashtra state of India and has witnessed an agricultural crisis to the extent that hundreds of its farmers have committed suicides in recent years. Satellite data based products have previously been used globally for monitoring and predicting of drought, but not for monitoring their extreme impacts that may include farmer-suicides. In this study, the performance of the Soil Water Index (SWI) derived from the surface soil moisture estimated by the European Space Agency’s Advanced Scatterometer (ASCAT) is assessed. Using the 2007-2015 data, it was found that the relationship of the SWI anomaly was bit stronger (coefficient. of correlation = 0.59) with the meteorological drought or precipitation than with the agricultural drought or crop yields of major crops (coefficient. of correlation = 0.50). The farmer-suicide rate was better correlated with the SWI anomaly averaged annually than with the SWI anomaly averaged only for the monsoon months (June, July, August, and September). The correlation between the SWI averaged annually increased to 0.89 when the averages were taken for three years, with the highest correlation occurring between the suicide rate and the SWI anomaly averaged for three years. However, a positive relationship between SWI and the suicide rate indicated that drought was not a major factor responsible for suicide occurrence and other possible factors responsible for suicide occurrence need to examine in detail.

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