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Bangladesh experienced widespread wheat blast infections for the first time in 2016. The outbreak of the disease has significantly affected wheat acreage and production. This study uses an 'action theory' framework to identify the determinants that affected wheat growers to adopt certain production practices to deal with the situation. We followed a multistage sampling procedure and interviewed 150 wheat growers from two severely blast-affected districts, Meherpur and Kustia. According to 91.3% of farmers, the most remarkable adoption strategies were 'improved intercultural practices,' 'shifting variety,' 'shifting crops', and 'undertaking off-farm activities,' of which farmers mostly followed the former. We also used multivariate probit model analysis to identify factors that shape farmers' adaptation choices in wheat blast-affected areas. The adaptation strategies are influenced mainly by farmers' education, primary occupation, family size, government incentives, extension services, access to Information and Communications Technology (ICT), and annual income. According to the notable similarities between the four adoption strategies, an adoption study should consider all potential factors influencing farmers' adoption decisions. Policy implications include strengthening extension services, developing tailored adaptation strategies, and conducting relevant research. [ABSTRACT FROM AUTHOR]

Bangladesh is situated in a subtropical to tropical climatic zone. A recently weathered crust has developed on sedimentary bedrock (sandstone, siltstone, shale and claystones) of Tertiary–Quaternary age. Weathered samples were collected from 16 sections totaling 68 samples and were analyzed mineralogically. The main primary minerals identified in the weathered crust of sedimentary rocks are quartz, plagioclase, K-feldspar, biotite, muscovite, sparse carbonate and epidote. The secondary minerals are kaolinite, illite, chlorite, gibbsite and goethite. Weathering initiated along the grain boundaries and cleavage planes of the minerals, forming small cloudy materials which were very difficult to identify. In the advanced stage of weathering, these cloudy materials have turned into secondary minerals. In region 1, high rain fall (7100 mm/yr) and monsoonic climate resulted in a kaolinite–gibbsite–goethite suite through the weathering of feldspars and biotite. The occurrence of gibbsite in the relatively elevated lands of Sylhet and Fe-kaolinite throughout the study areas is indicative of a humid–tropical climate during formation of the weathered crust. [Copyright &y& Elsevier]