In a rural environment, the decrease of sesame (Sesamum indicum L) production is the result of suitable growing system absence mainly sowing density and sowing method. Thus, to improve production of these crops, some investigations were undertaken on experimental site of University of Jean Lorougnon Guède. In order to reach these objective two sowings methods (flat soil and mound soil) were tested in random design with three repetitions. Also, inside of each sowing method three sowing densities were tested mainly low density, medium density and high density. It results from statistical analysis that the values of yield and its components were recorded on flat soil with low density.

In this study, the effects of concentration of Na2CO3, time of digestion, and temperature of digestion on the extraction rate of sodium alginate by calcium coagulation-ion exchange were investigated by single factor test and orthogonal test using commercially available kelp as raw materials. Results show that concentration of Na2CO3 effects on extraction yield of sodium alginate is of high significance, temperature of digestion and time of digestion have less effect on the extraction yield of sodium alginate. The best experiment condition is obtained by the analysis of the orthogonal experiment results, when concentration of Na2CO3 is 8%, digestion time is 3 h, and temperature of digestion is 50°C, the highest extraction yield of sodium alginate is achieved. The viscosity of sodium alginate solution was 131 Pa•s-1 (20°C) in the product.

This study aimed to obtain the best ration with the use of fermented rice straw (RF) as a basal feed for cattle farms. The RF was made by fermenting rice straw using Rhizopus oligosporus. The concentrate consisted of many locally available feed ingredients. The supplement was composed of several feeds as a multinutrient to supplement any deficiencies in the ration. There were 4 treatment rations: RF = 100% RF (control), RFS = RF + 10% supplement, RFSC = RFS + 10% concentrate, and RFSC2 = RFS + 20% concentrate. The rations were tested by in vitro digestion using bovine rumen fluid and 48 hours of incubation at 39 °C under anaerobic conditions. The results showed that the addition of the supplement significantly increased the digestibility of the dry matter, organic matter, crude protein, and hemicellulose, while the addition of the concentrate significantly increased the concentration of VFAs and the digestibility of NDF and cellulose. The best composition was an 80:10:10 (% DM) mixture of RF, supplement and concentrate.

This study aimed to determine the effects of genetic variability or polymorphisms in intron 2 of the GH gene in three duck populations—Muscovy, Pekin, and Mulard. We employed PCR–RFLP to detect the various genotypes and studied their associations with important economic traits, such as body, dressing, breast, and thigh weights. Two alleles, GHT and GHC, and three genotypes, GH/TT, GH/CT, and GH/CC, were identified in ducks at the locus, GH/BsmFI. In all duck populations, the frequency of allele T was higher than that of allele C and the most frequent genotype was GH/TT. All three genotypes were detected in Pekin ducks; whereas, only GH/TT and GH/CT genotypes were observed in Muscovy and Mulard ducks. Ducks with GH/TT genotype was superior (P < 0.001) to birds with other genotypes with respect to the body, dressing, and breast muscle weights. Muscovy ducks with GH/TT genotype had greater thigh weight (P < 0.001) than those with GH/CT genotype. However, no significant difference was detected for thigh weight among the three genotypes in Pekin and Mulard ducks. Based on our study, we concluded that the GH gene is an excellent genetic marker for enhancing the genetic potential of ducks for economically important traits.

The present study was carried out in the farmer's field at Dashpara Sylhet and the research laboratory and farm of the Department of Crop Botany and Tea Production Technology at Sylhet Agricultural University, Sylhet. The study was carried out during October 2016 to May 2017 to study the effect of planting dates on growth and yield of sweetpotato (Ipomoea batatas L.) genotypes. The study was done under three planting date’s viz. 10 October, 10 November and 10 December. Six genotypes evaluated in the study were Bangladeshi namely BSP-1(Tripti), BSP-2 (Kamalasundori), BSP-5, BSP-8, BSP-12 and Local-6. The experiment was laid out in a Randomized Completely Block Design (RCBD). The field was divided into 3 blocks for 3 replications. Data on the morphological characteristics, growth studies and yield parameters were recorded at 150 days after planting (DAP) at final harvest. Results revealed that the morphological characteristics, dry matter partitioning and yield attributing parameters varied among the genotypes and planting dates. From the present findings, it was found that better genotypes, which in regard to vegetative growth parameters gave low yields. The Local-6 genotype was grown vigorously but produced poor storage root. In respect of interaction effect, BSP-5 planted on 10 November showed the highest number of leaves (332.67) and total leaf area (13727.60 cm2 plant-1), whereas the same genotype planted on 10 October showed the lowest number of primary (2.00) and secondary (3.00) vines and the lowest number of leaves plant-1 (70.00). BSP-12 planted on 10 November showed maximum total fresh weight (1664.57 g plant- 1) after check genotype (1761.17 g plant-1) and BSP-12 planted on 10 December 2016 showed maximum total dry weight (457.73 g plant-1) after check genotype (618.60 g plant-1). The highest root yield was found in BSP-12 (88.30 t ha-1), planted on 10 November and the lowest yield was found in BSP-5 (22.53 t ha-1), planted on 10 October. BSP-12 ..........