The growth analysis of a promising variety of BJRI Tossa pat 6 was determined at Jute Research Regional Station; Faridpur during March to September 2018 to know the appropriate time of harvest for maximum yield and to identify which improvement could be done to the variety. The variety BJRI Tossa pat 5 was grown as cheek variety. The plants were harvested to 15 days interval starting from 30 day after sowing to the age of 135 days. The genotype BJRI Tossa pat 6 was found superior in respect of stick, bark and root than BJRI Tossa pat 5. Plant height, base diameter, and dry-weight of leaf were higher in BJRI Tossa pat 5 than BJRI Tossa pat 6. The highest bark weight 19.19 g/plant was recorded at 135 day after sowing. 45 to 60 days and 90 to 105 days after sowing were more crucial for fibre production of BJRI Tossa pat 6.

Key words: Dry matter, harvested, jute.

Introduction
Jute is the eco-friendly and important fiber crop in the whole world. In entire life cycle of jute it is friendly to the environment and produces no toxic materials (Sarkar, 2008). On average, jute of about 1 hector land absorbs 15 ton CO2 and 11 ton O2 from the atmosphere during 100 days of its life. So for developing improved genotypes of this eco-friend crop, it is necessary to identify and quantify growth limitations of existing genotypes at all growth stages. Change in dry matter is the most important parameter for quantitative analysis of plant growth. It is required to explain the differences in plant growth in term of differences between species growing under same environmental condition or differences within a species growing in different environmental conditions (Pandey et al., 2017). It is also very important to identify the most crucial time for the development of particular plant parts like leaf, root, bark stem etc. That’s why an experiment was conducted to identify the dry weight increasing pattern of leaf, root, bark and stem of a newly released jute variety BJRI Tossa pat 6 in Jute Research Regional Station of Bangladesh.

Materials and Methods
This experiment was conducted at Jute Research Regional Station, Faridpur (23.580 N latitude and 89.810 logitude). Two varieties of jute viz. BJRI Tossa pat 5 (as control) and BJRI Tossa pat 6 were practiced in this experiment. The date of sowing was 28 March, 2018following the spacing 30 x 5 cm. The experiment followed Randomized block design and the recommended fertilizer doses. Four weeding was done at 10 April, 26 April, 4 May and 4 June, 2018 respectively. 1st thinning was done during 17 April and 2nd at 5 May, 2018. To control the mite infestation Kumulas was sprayed at 04 June, 2018. The plants were harvested at 15 days interval starting from 30 days after sowing to the age of 135 day. A sample of 10 plants was collected from each replication and the samples were subjected to analyze for dry mater distribution. The plant height, base diameter were recorded at every harvest. The dry weight of leaf, stick, bark and root were determined after drying at 100 0c temperature for 48 hr. Eight harvests were completed to know the dry matter distribution. Data analysis has been done by SPSS.