Development of sustainable aquaculture project (DSAP): mid-term review report

Aquaculture, Fish culture, Pond Culture, Rice field aquaculture, Farmers, Bangladesh,

Evolution and implications of decreased public involvement in minor irrigation management in Bangladesh

In IIMI; Wuhan University of Hydraulic and Electrical Engineering. International Conference on Irrigation Management Transfer, Wuhan, China, 20-24 September 1994. Draft conference papers. Vol.2. Colombo, Sri Lanka: International Irrigation Management Institute (IIMI); Wuhan, China: Wuhan University of Hydraulic and Electrical Engineering

CHANGES IN THE CROP PRODUCTION AND THEIR SOURCES IN BANGLADESH AGRICULTURE

The magnitude of changes in average crop production and the sources of changes were measured for six crops- Aus rice, Aman rice, Boro rice , jute, wheat and sugarcane between two time periods pre-modern technology adoption period and modern technology (MT) adoption period. Except for wheat, these periods were defined as 1947/48 -1967/68 and 1968/69- 1986/87 respectively. For wheat, these periods were defined as 1947/48-1971/72 and 1972/73 -1986/87 respectively. The analysis shows that production, area and yield increased at the national level for all the crops except jute. Although area under jute increased, its production and yield declined in the second period. Change in mean area was the main source of mean production change in sugarcane, Aus rice and Boro rice. But yield was the main source of increase in Aman rice production and decrease in jute production. For wheat, interaction between changes in mean area and mean yield was the principal source of change in production. And yield of all these crops except jute increased due to the adoption of modern technology (MT). Finally, some policy conclusions are drawn with respect to an improvement of production levels of the major crops

PRODUCTIVITY AND EQUITY PERFORMANCE OF DEEP TUBEWELL IRRIGATION UNDER DIFFERENT MANAGEMENT SYSTEMS IN CHANDINA THANA OF CQMILLA DISTRICT

This study compares productivity and equity performance of deep tubewells (DTWs) under different management systems (rental, KSS and private). Results show that the command area per MW, and output and gross return per unit of land were significantly higher under private management than under KSS and rental management. However, farmers' gross margin, return over cash cost and full cost of HYV Boro paddy produced under rented DTW schemes appeared to be higher than those under KSSDTWs and private DTWs. As regards the equity issue, it was observed that the produced benefits from irrigation were relatively more equally distributed to the farmers under KSS-D'I'Ws• compared to private D'IWs and rented DTWs. It revealed that private DTWs showed somewhat better performance from the view point of DTW managers/owners, while rented DTWs showed somewhat better performance from the view point of farmers. It is also concluded that KSS managed DTWs showed a little better performance with respect to farmers access to produced benefits from irrigation schemes

Measurement of single-diffractive dijet production in proton–proton collisions at √s=8Te with the CMS and TOTEM experiments

Measurements are presented of the single-diffractive dijet cross section and the diffractive cross section as a function of the proton fractional momentum loss ξ and the four-momentum transfer squared t. Both processes pp→pX and pp→Xp, i.e. with the proton scattering to either side of the interaction point, are measured, where X includes at least two jets; the results of the two processes are averaged. The analyses are based on data collected simultaneously with the CMS and TOTEM detectors at the LHC in proton–proton collisions at s=8Te during a dedicated run with β∗=90m at low instantaneous luminosity and correspond to an integrated luminosity of 37.5nb-1. The single-diffractive dijet cross section σjjpX, in the kinematic region ξ< 0.1 , 0.03<|t|<1Ge2, with at least two jets with transverse momentum pT>40Ge, and pseudorapidity | η| < 4.4 , is 21.7±0.9(stat)-3.3+3.0(syst)±0.9(lumi)nb. The ratio of the single-diffractive to inclusive dijet yields, normalised per unit of ξ, is presented as a function of x, the longitudinal momentum fraction of the proton carried by the struck parton. The ratio in the kinematic region defined above, for x values in the range - 2.9 ≤ log 10x≤ - 1.6 , is R=(σjjpX/Δξ)/σjj=0.025±0.001(stat)±0.003(syst), where σjjpX and σjj are the single-diffractive and inclusive dijet cross sections, respectively. The results are compared with predictions from models of diffractive and nondiffractive interactions. Monte Carlo predictions based on the HERA diffractive parton distribution functions agree well with the data when corrected for the effect of soft rescattering between the spectator partons. © 2020, CERN for the benefit of the CMS and TOTEM collaborations