108 research outputs found
APPJ
No full textAhead of Target: Achievement of Replacement Level Fertility in Sri Lanka before the Year 2000 - By W. Indralal De Silva ... 3
Provincial Patterns of Contraceptive Use in China - By Quanhe Yang ... 23
Problems and Prospects of Implants as a Contraceptive Method in Bangladesh - By M. Mujibur Rahman, M. Nurul Islam, Md. Azizul Haque and G.M. Kamal ... 43
Role of Government Family Planning Workers and Health Centres as Determinants of Contraceptive Use in Bangladesh (Demographers' Notebook) - Nashid Kamal ... 59
Cairo Programme of Action Adopted (Demographers' Notebook) ... 6
Medical Treatment of Rheumatoid Arthritis: A review
No full textDOI: 10.3329/jbcps.v28i2.5378J Bangladesh Coll Phys Surg 2010; 28: 132-133</jats:p
Validation and extended application of cellulose microfibril swelling enzyme assay method to alkali induced swelling of cellulose
No full textENGLISH LANGUAGE DIASPORA AND THE HIT-AND-MISS EXPERIMENTATION WITH ENGLISH CURRICULUM IN BANGLADESH
No full textDespite the common diasporic origin English in Bangladesh is neither a native nor a second language, but a foreign language, in countries like India and Pakistan, English is used as the second language. The chronological history of English in Bangladesh has both political as well as social elements, which influence the learning of English at every level of education. In the mid-90s there was a growing demand from the educationists in the country to change the English curriculum as per ‘needs analysis’, and the curriculum is restructured aligning with the communication needs and the syllabus was largely transformed into a communicative one. Yet research explores that the needs are not served for the learners tend to by-pass the cognitive part of the language learning—thus failing to communicate properly. Now, in the second decade of the new millennium English curriculum along with other subjects has been made ‘creative’ at pre-tertiary level, but debates are still on to evaluate whether the system complies with the current practices prevailing within the institutional premises. The total picture thus presents a very confusing answer to the questions why all these efforts are being futile and why the English language teaching fails to touch the three main domains of learning—the cognitive, the affective and the psychomotor. The current study wants to explore whether such experiments with the curriculum and the dilemma of receiving or rejecting the idea of acculturation with largely an anti-colonial mindset hinder the desired performance of the language.</jats:p
The effects of short-term pasture-arable rotations on the accumulation, forms and subsequent mineralisation of organic sulphur and nitrogen in soils
No full textIn the short-term mixed cropping farming system, commonly used on the Canterbury Plains region of New Zealand, grazed ryegrass-white clover pastures are grown in rotation with arable crops. Arable crops are generally grown for 2-5 years and are then followed by 2-5 years of grazed grass/legume pasture to maintain soil productivity. Historically, ryegrass-white clover pastures have been used as restorative crops in New Zealand mixed cropping rotations. Recently mixed herb leys have received considerable attention in New Zealand as restorative crops, especially in organic farming systems, and many New Zealand farmers regard lupins as an annual restorative crop due to both its nitrogen fixing ability and its reported effect as a biological plough. Soil organic matter (OM) increases under improved pasture and decreases during arable cropping. Several aspects of organic sulphur (S) and nitrogen (N) accumulation during short-term pasture under different pasture types and management and changes during cropping were addressed in this thesis.
The effects of restorative crops on the accumulation of organic S and N in soils and the effects of S and N accumulated under pasture on the subsequent arable crops were investigated in a field experiment established on the AgResearch farm in Canterbury. Treatments included perennial and annual pastures and arable crops during a 6-year pasture phase, and cultivation of wheat during a 3-year cropping phase. Soils from four other locations were also included in the study to investigate the OM build up in soils under a wider range of soil types and management.
Results from the restorative crops trial (RCT) soils showed that organic S and N accumulation were significantly different between some of the treatments during the pasture phase and was related to the amount of residue return to the soil. The perennial treatments showed greater increase in soil organic S and N accumulation than the annual treatments. Organic matter accumulation was higher in the grazing treatment than the mowing treatment, and direct drilled cultivation of annual pasture accumulated higher amounts of S and N in soils than conventional cultivation. The grazed perennial ryegrass and perennial ryegrass/white clover treatments were the most beneficial in accumulating OM in soil during the pasture phase of the trial. Over 95% of soil S and over 99% of soil N accumulated under pasture was in organic form. The major proportion of the accumulated S was in the HI-reducible form (ester-S).
Cultivation of wheat during the cropping phase reduced OM from soils under all the former restorative treatments. The beneficial effects of the pasture accumulated organic
S and N disappeared very quickly during cropping of wheat in the cropping phase. The grazed perennial ryegrass and perennial ryegrass/white clover treatments showed the highest benefit on the subsequent wheat crops in terms of S and N uptake.
An open incubation study was conducted with soils from selected treatments of the RCT trial for 18 weeks to investigate the mineralisation potentials of the pasture accumulated organic S and N in soils. Net mineralisation of S was significantly different between treatments up to eight weeks of incubation. Net N mineralisation, on the other hand, was significantly different between some of the treatments throughout the entire incubation period. During the incubation study rapid S release occurred until the eighth week of incubation, whereas, N release slowed down soon after the second week of incubation probably due to a decrease in readily mineralisable substrate in the system. However, the total amounts of S and N release from the soils were small.
Studies on light fraction organic matter (LF-OM) in soils from the RCT, long-term pasture ecology (LET) and the Pukekohe soils indicated that the restorative treatments of the RCT trial significantly affected the accumulation of LF-OM in soils during the pasture phase. Amounts of LF-OM in soil were variable under different soil types and management practices. Residue return from the pastures during the pasture phase directly influenced the accumulation of LF-OM in soil. Arable cropping reduced the LF-OM in soil in the RCT trial but the contribution of S and N from LF-OM during the cropping phase was less than 10% of the requirements of S and N for wheat. Mineralisation of S and N from LF-OM in an aerobic incubation revealed that NaI solution used for isolation of LF-OM from soils reduced mineralisation potential of LF-OM. Overall S and N release from LF-OM was very small.
Extraction of OM from soils was carried out with NaOH, aqueous acetylacetone and chelating resin. Results obtained from the extraction procedures revealed that all the three extractants extracted substantial and comparable amounts of organic S and N from soils. The proportions of organic S and N extracted were clearly different over the wide range of pasture management and soil types. In the RCT soils the major proportions of soil S, N and HI-S were present in the humic acid fractions, but in the LET and the Pukekohe soils the major proportions of N and HI-S were present in the fulvic acid fraction. Mineralisation of S and N from the humic and fulvic acid fractions was significantly different under the restorative treatments and both humic and fulvic acid fractions contributed to the S and N turnover during the cropping period. Greater N turnover occurred from the fulvic acid fraction except for the annual barley treatment whereas, S mineralisation occurred mainly from the humic acid fraction.
Ultrasonic dispersion in the acetylacetone extraction did not increase OM extraction compared with the NaOH and chelating resin methods but sequential extraction of OM by acetylacetone indicated that quite high proportions of OM are more difficult to extract. Chelating resin, although a milder extractant, can extract substantial amounts of OM from soils under short-term pasture-arable rotations and it extracted potentially labile fractions of HI-S as shown by the significant correlation between chelating resin extractable HI-S and fulvic acid S after the pasture phase. Among the soil OM extraction methods studied, the NaOH extraction was the cheapest, quick and easy to use procedure
Application of cluster expansion techniques to open shells: Calculation of difference energies
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Effects of Various Fertilizer Doses on Mustard Crops under Zero Tillage System
No full textA field experiment was conducted at the BINA substation farm, Ishurdi, Pabna during 2018-2019, 2019-2020 to see the effects of various fertilizer doses on mustard plant under zero tillage system after harvest of T.aman rice. Nine treatments combination were used in the experiment. The treatments were T1: Native soil fertility only (no fertilizer), T2: 50% recommended N, T3: 100% recommended N, T4: 100% recommended NPKS, T5:125% recommended N, T6:125% recommended NPKS, T7: 50% recommended NPKS, T8: 50% recommended PKS+100%N, T9: 50% recommended PKS+125%N. Yield and yield contributing characters were recorded. Yields and yields contributing characters of mustard were significantly influenced with the different treatments. The treatment T4 (100% recommended NPKS) gave the highest seed yield followed by the treatment T5 (125 % recommended NPKS) in zero tillage condition. The results indicated that 100% NPKS (T4) or 125% NPKS (T6) enhanced more crop growth which influenced on greater seed yield of mustard. Partial cost-benefit analysis indicated that the treatments T8 and T9 was greater profitable than the treatments T4 and T6. However, considering at maximum yields and highest net return, the treatments T4 or T6 could be recommended for more production of mustard in zero tillage system. Therefore, fertilizer doses of the treatment T4 (N, P, K and S @ 90, 27, 32 and 15 kg ha-1) or the treatment T6 (N, P, K and S @ 113, 34, 40 and 19 kgha-1 ) could be adopted in the cultivation of mustard for getting maximum yields under zero tillage system in late sowing condition
Emulsification potential of milk fat globule membrane material microfiltrated from buttermilk whey
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