A field c pcrimcnt '" as conducted at the research farm of Sher-e-Bangia Agricultural Univ crsity, Dhaka. during November 2006 to March 2007 to tudy the effects of nitrogen and boron on growth and) ield of tomato. "Ihe experiment w as laid out in a Randomized "'ofTIpletc Block Design \\ ith three replications of each treatment. 1 he unit plot size was 3 m2 (2.2 III x 1.8 m), 1 here were 12 treatment combinations in the e perirncnt comprising 4 lev cis of N
lO.
60. 120 and180 kg/ha designated as O. 60. 120 and IRO. respectiv ely and lev cis of B (0.
004 and 0.6 kg/ha designated as 130• B04 and BOb. respectively), I he indiv idual and combined effects
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nitrogen (N) and boron (B) on growth, ) ield and nutrient content in tomato plants \\ ere studied.Nitrogen and Boron fertilization at different levels indiv idually and in combination created a significant impact on growth. ) ield and nutrient content of tomato plants and fruits. Ihe tallest plants of 110.4 em and 122.3 em \\ as produced \\ ith 180 kg N/ha and 0.6 kg B lUll. respectiv d) and shortest plants of 90.59 ern and 9 L 78 em
\0\as found in control treatments. Ihe tallest plant (142.2 ern) w as found in 120Bo6
treatment and the .hortcst plant (58.53 em) \\ as ob en cd in the control treatment.
TIle highest number of flower cluster per plant (10.11 and 9.47) was recorded from the treatments of 120 kg N Iha and 0.6 kg B/ha. respectively and plants in control plot produced the lowest numbers
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nO\\ er duster per plant. Cornbincdly the treat ment N120Bu(.produced the maximum number of flower cluster per plant (12.67). I he lowest number of flower cluster per plant (6.667) was obtained from Nollo1l1C highc t numbers of flower per cluster of 10.5 and 10.17 were produced b) 120 kg N/ha and 0.6 kg BJha. respectively and the lowest number of flower per cluster was obscrv ed in control treatments. The highest numbers of flower per cluster ( I 1.(}7) was found in N 120BI)6 treatment and the control trcauncnt (N()Bu) gave the
10\\est numbers of flower per cluster (7.33). 1 he highest numbers of fruit per cluster (6.~5 and 5.7&) \\eTC obtained w ith the application of 120 kg N/ha and 0.6 kg B/ha. respectively and the lowest numbers of fruit per cluster was produced b) control treatment . -I he highest fruit per cluster (6.33) \\ as obtained in N 120Bo6
treatment and the lowest number of fruit per cluster (4'(J) was produced b) the control treatment.
The highest numbers of fruit per plant (50.11 and 47.75) were obtained with the application of 120 kg N/ha and 0.6 kg Brha, rcspcctiv cl~ and the lowest numbers of fruit per plant was produced by control treatments. '1he highest fruits per plant (67.3~) was found in 120 kg N 'ha along \\ ith 0.6 kg Blha application and the lowest numbers of fruit per plant (28.67) produced b) the control treatment. Fruit weight per plant increased w ith increasing lev cis
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N up to 120 kg/ha,Application of B at the rate of 0.6 kg/ha produced higher fruit weight per plant (1.402 kg) and the 10\\est truit \\ eight per plant
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1.169 kg) \\ as produced v~ith control (Bo) treatment. ornbined application of and Bresultcd the highest fruit"eight per plant (1.953 t/ha) in '120Bo6lrealment and the lowest fruit weight per plant (0.891 t/ha) was found b) the control treatment (NoBo)·
Plant receiving N at the rate of 120 kg/ha produced significantly higher weight of fruit per plot (19.14 kg) and the lowest weight of fruit per plot (12.20 kg) was recorded in control treatment. Weight of fruit per plot was not significantly affected h) different ICH!ls of boron. 1 he treatment combination N 12oBo6gav e the highest weight of fruit per plot (23.20 kg) and the lowest weight of fruit per plot
(10.70 kg) "Us obtained from the oBo treatment. lndiv idual application of 120 kg Nlha produced the highest fruit) ield (4M.33 t hu) and the 10\\ est fruit) icld (30.M2 t/ha) "as obtained ill control treatment. Fruit) icld incrca cd w ith increasing lev cis of B. omhincd application of Nand B produced the highest fruit) ield (5&.59 tlha) h) the N120Bu(l and the lowest fruit yield (27.02 t/ha) was obtained from control trcauncnt (NoBo).
'I he highest N content in plant "as 1.71% in NI211treatment and the lowest content in plants (0.950/0) was found in 0 treatment. itrogcn content in plant was not signifi anti) affected b) different B levels. 1 he combined effect of and B on content in plant was ignificant. 'Ihe highest concentration of • obtained with NI80Bo6lrcatment and the minimum plant- content , ..as found in control OB04)'
1 here \\ as no significant difference among the different treatments
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N in respect of B content in plants. I he highest B concentration (O.()15%) was obscrv cd in Bo6'1he maximum boron content (0.037%) in plants was found in NlimBo6 treatment and the minimum B-contcnt (0.025%) was found in control. I he highest N content in post han est soil was 0.081 %. which was observ cd in NII!U treatment and the
lowest N content in post han est soil (0.0550%) was (mild in No. Nitrogen content in post han c t soil "US not significantly affected h) different B levels. The combined effect of and B on N content in post harvest soil wa significant. I he highest concentration of obtained w ith N120Bo treatment and the minimum content in post harvest soil was found in NoA04.
From the present stud) ~the follow ing conclusion rna) be draw n