http://localhost:8080/handle/123456789/2172 2026-04-18T16:15:36Z http://localhost:8080/handle/123456789/2188 EFFECT OF SOWING METHODS AND TIME ON COTTON YIELD IN SALINE AREA OF BANGLADESH Akhteruzzaman, M.; Miah, M. A. E.; Islam, M. M. The experiment was conducted in a fanner's field at Tala Upzilla of Shatkhera district during the season of 2009·201 0 to evaluate cotton yield in saline soil under two sowing methods and time. The experiment was arranged in Factorial Randomized Complete Block Design (RCBD) with four treatments such as, Direct Seed Sowing in December (DSSD); Polybag Seed Sowing in December (PSSD); Direct Seed Sowing in February (DSSF); Poly bag Seed Sowing in February (PSSF) with three replications. Significant variation among the treatments were observed for plant shoot elongation rate, no. of vegetative branches per plant, single boll weight, days to first flowering and days to first boll splitting. Significant differences among the treatments were not seen for no. of primary fruiting branches per plant, no. of effective boll per plant and for seed cotton yield. Better plant establishment was exhibited in PSSD and PSSF where poly bag-seedlings were transplanted. DSSF and PSSF showed higher seed cotton yield (2.17 - 2.25 tlha) with earliness due to higher rate of initial plant shoot development up to 71 days after sowing (DAS) and with lowest values of vegetative branches per plant, days to first flowering and days to first boll splitting. Here the time of sowing was mainly responsible to make the result significant. 2010-07-01T00:00:00Z http://localhost:8080/handle/123456789/2187 EFFECT OF PLANTING DE:\,SITY ON TilE GROWTH AND YIELD OF CHINESE CABBAG E tBrussica campestris var. pekinensis L.) Tanjin, T.; Sultan, N.; Uddain, J. \11cxpcruncnt wus conducted In the l loruculturc farm ofShcl·,'·llangla Agrrcultural (:IIII·,'ISII\. Dhuk.i. IlanglaJesh during the pcnod trom October 20(11,to Fcbruarv 20()7 to study the effect ot JIt':~n:1lt pl:lllting dcnsitv on the growth and vrcld otChincsc eahha~.~ Diflcrcnt I,pes ot'pi:tnting ,kIlSII\ \1/ S, (50 em . 20 CI11).S, (50 em ., 30 em) and S, (50 em ' ,10 em) were used ill thiS cxpcnmcnt Tit,' l"p,'nmcnt ":lS laid OUI in the Randomized Complete Block Deslr-Il (RCllD) with SI" rcphcauons Data oil .Iulcrcnt v rcld contributing characters and yil...·ld were recorded. \'icld and )1, ..ld c.inuihuung charaClt.:fS vaned SlatlSII(all> due 10 the different planting density otChmesc lahb:Jge i\1 harv c.a. S, (50 em x 2(J ,'m) r:a1c the tall,'sl plant (2491 em) which "'as st:lIlstically Similar (2451 em) with S: uc.umcnt. wlulc the trc.umeru S, (:;1; ern . 4(1 em) gave the shortest (23 28 em) plant. During harvest. tr"alinenl S, gave the maxuuum spread or plant (43.91 em), number "f unfolded leaves per plant (1/78). davs [rom transplanting to 111!1i:tlionor Iwad (2156). davs from uunsplanung 10 head 1'>rInatlon(5.1.56). thickncsx of head (18 7tJ em). .h.imerer 1)1' head (15'13 em), fresh weight or head per plant (2.11 kg) and number or foots per plant (1725) III S, Ircatmen I whidl was statistically Jlkntical with S:;(S() (111 -", 30 ern). w hiic on l!lt.' (OJltrdl"} S. g.rvc IIll' mnunuuu s;lread of plant (4U 19 em). number of unfolded lcav cs per plant (10 X'il. ,blS 1'101ll uansplanung W miuation or head (17.33), days from trunsplanung to head f()[In:ltloll (5(' S'i I. thlc~n,'ss III' he,," (1721 em), diameter or head (1-10(, em). fresh weight of head per plant( I 02 kg I and number III' roots per plant ( 16.7·1).rl',p~etil'l'ly At harvest, rreauncnt S, gave the maximum (26 22,1number of folded Ic.ivcs per plant w lnch \,"as suuisucall. sunilar (2·t~N) to Sl tre.umcm .vhcrcas S· g:IV\.' Ih~ nununum C::·l l l l. r\.'sIX'l'li\I..·I~ lrc.umen: S~ gave the longest (6 S6 em) kngth olstcm. wlulc SI g.a\L' thl' shortest (-I X-I em) Planting dcnsitv S., gave till' highcs: gross Yield per hectare (7X 53 ion/ha) ;!f1d S. g~\\C lb·.: 1011cst ((,1) ('0 ton/ha ) rhe present results concluded Ihat the ucauncm S, (50 en: 30 ,'111)~:Ih' the 2010-07-01T00:00:00Z http://localhost:8080/handle/123456789/2186 MORPHO-PHYSIOLOGICAL CHANGES AND YIELD PERFORMANCE OF YARD LONG BEAN UNDER REDUCED LIGHT LEVELS Haque, M. M.; Ahmed, J. U. An intensive investigation was conducted to study the morpho-physiological changes and yield performance of yard long bean under different light levels (100, 75, 50 and 25%). Main stem length, internode length and individual leaf area were increased but main stem diameter, leaves plant" and SLW decreased significantly under reduced light intensity. Leaf chlorophyll and leaf nitrogen content were increased but leaf p-carotene content decreased markedly under reduced light levels. Chlorophyll a : b ratio significantly decreased when light intensity was lower to 50% because of the less increase of chlorophyll a compared to chlorophyll b. The highest number of fruits plant" (255.2) and the maximum individual fruit weight (15.78 g) were recorded at 75% light level. Significantly the lower fruits plant" (138.7) and individual fruit weight (11.98 g) were achieved from 25% light level. The highest fruit yield was obtained at 75% light level (12.91 t ha") was followed by 100% light level (12.16 t ha'), 50% light level (10.21 t ha") and then by 25% light level (5.73 t ha'). Under reduced light level shade tolerant parameters viz. leaves plant", individual leaf area and leaf chlorophyll content exerted positive effect on the yield of yard long bean. Consequently fruit yield did not decrease significantly up to 50% reduction of light intensities. 2010-07-01T00:00:00Z http://localhost:8080/handle/123456789/2185 CULTURAL AND MORPHOLOGICAL CHARACTERIZATION OF Rhizoctonia solani ISOLATES ASSOCIATED WITH DAM Kunda, S.; Mian, I. H. A total of 50 isolates of Rhizoctonia solani was isolated from infected roots and stem base of diseased cotton seedlings collected from different locations throughout Bangladesh. Of them 29 were isolated from samples of Hill cotton. Out of 29 samples of Hill cotton seedlings 16 were collected from 16 locations of Bandarban district, 10 from 10 locations of Rangamati district and other three from 3 locations of Gazipur district. Rest of 21 isolates were associated with samples of 4 American cotton varieties namely CB-3, CB-5 and CB-9, CB-I a grown in the district of Gazipur, Dhaka, Rangpur, Pabna, Kushtia, Meherpur and Natore. The isolates were designated with first letter of district names and first two letters of upzilla names from where the diseased samples were collected along with a serial number. A series of experiments were conducted for characterization of 50 isolates of R. solani associated with cotton grown in different locations of Bangladesh. A total of 50 isolates of R. solani were found to infect the colton seedling. Remarkable cultural and morphological variations were found among the isolates. Three types of mycelium and colony structures viz compact, slightly fluffy or fluffy were observed. The colony color was very light brown, light brown, brown and dark brown. Pattern of sclerotia distribution was throughout the plate, at centre, periphery and irregular. 2010-07-01T00:00:00Z