http://103.7.193.12:8080/xmlui/handle/123456789/12 DEPARTMENT OF SOIL SCIENCE (SSC) Sun, 26 Jul 2026 09:45:57 GMT 2026-07-26T09:45:57Z http://103.7.193.12:8080/xmlui/handle/123456789/2166 EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON AZOTOBACTER AND CYANOBACTERIAL POPULATION AND RICE CROP IN PIEDMONT SOIL RAHMAN, MD. MANSUR A study was undertaken to evaluate the combined effects of organic and inorganic fertilizers on the indigenous Azotobacter and cyanobacterial population in soil and on the growth and yield of rice for the Boro-fallow-T. aman rice cropping pattern. The study was carried out both at the field and the laboratory of the Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur. In the field experiment, BRRI dhan28 (boro) and Kataribhog (aman) were grown following the rice-rice cropping pattern in the two consecutive years of 2009 and 2010 in Piedmont soil (AEZ#1). The study was initiated in November 2008 and was continued up to January 2011 to complete two crop cycles with boro rice (BRRI dhan28) as the first crop and T. aman rice (Kataribhog) as the second crop in each cycle. The experiment was laid out in the randomized complete block design (RCBD) with eleven treatments having three replications. The 11 treatment combinations consisting of N, P, K, S, Zn, cowdung (CD), poultry manure (PM) and mustard oil cake (MOC) including one control treatment were as follows- T0 : Control, T1 : 100 % RFD on the soil test basis, T2 : 75% RFD+25% CD, T3 : 50% RFD+50% CD, T4 : 75% RFD+25% PM, T5 : 50% RFD+50% PM, T6 : 75% RFD+25% MOC, T7 : 50% RFD+50% MOC, T8 : 75% RFD+25 % (CD, PM, MOC), T9 : 50% RFD+50% (CD, PM, MOC) and T10 : 34% CD + 33% PM + 33% MOC. Data were recorded on yields, yield components and N, P, K and S contents and uptake by the grain and straw of rice. In the laboratory indigenous cyanobacterial and Azotobacter population in soil under study were determined before transplantation, 30 and 60 days after transplanting (DAT) and after harvest of rice crops. Soil organic matter status, total N, available P, S and exchangeable K of soil were also determined at 30 and 60 DAT and after harvest of rice crop to assess the nutrient dynamics due to impose of different treatments. The results of the present investigation indicated that integration of organic and inorganic fertilizers significantly influenced the yield and yield components of rice, indigenous cyanobacterial and Azotobacter population in soil and soil chemical properties. Results showed that the highest grain yields of boro rice of 6.09 and 5.75 and those of straw of 6.86 and 7.65 t ha-1 were recorded in treatment T8 having 75% chemical fertilizer and 25% organic manures during boro seasons of 2009 and 2010, respectively. The lowest grain yields of 3.15 and 2.82 and those of straw yields of 3.88 and 3.37t ha-1 were recorded in T1 during 2009 and 2010, respectively. The highest grain yields of T. aman rice of 5.40 and 4.90 and those of straw yields of 10.21 and 11.21t ha-1 were recorded in T8 during T. aman seasons of 2009 and 2010 respectively. The lowest grain yields of T. aman rice of 2.78 and 2.28 and those of straw yields of 4.67 and 5.67t ha-1 were found in T1 during 2009 and 2010, respectively. The yield components viz. plant height, tillers hill-1, panicle length, grains panicle-1 and 1000 grain weight were significantly affected by the treatments and the maximum values were recorded in treatment T8. The highest N, P, K and S contents and uptake by rice were recorded in treatment T8. Cyanobacterial and Azotobacter population was significantly affected by the treatments. Higher cyanobacterial population was recorded in 2010 than those were observed in 2009. On the contrary, cyanobacterial population was higher in boro season than those were recorded in T. aman season of the same year. Similar pattern of Azotobacter popular was recorded during the entire period but the population was higher in boro season than those of T. aman season. Soil organic matter and nutrient status such as total N, available P, S and exchangeable K were slightly increased due to experimentation. From the overall results, it can be concluded that integration of organic and inorganic fertilizers can save 25% chemical fertilizer without any yield decline. EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON AZOTOBACTER AND CYANOBACTERIAL POPULATION AND RICE CROP IN PIEDMONT SOIL; A DISSERTATION FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN SOIL SCIENCE BY MD. MANSUR RAHMAN, STUDENT No: 0805002, SESSION: 2008; DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR, BANGLADESH. Tue, 01 Jan 2008 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2166 2008-01-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2165 EFFECTS OF LIME, PHOSPHORUS AND POTASSIUM ON CROP YIELDS OF DIFFERENT CROPPING PATTERNS IN ACID SOILS ISLAM, MD. SADEQUL Experiments were conducted during 2012-2014 at HSTU farm (AEZ-1) and Farmer’s’field (FF) (AEZ-27) under Dinajpur district following two cropping patterns viz. Wheat-Mungbean-T.aman and Wheat-fallow-T.aman to evaluate the effects of lime, P and K on yields of crop as well as soil properties. There were seven treatment combinations viz. L0 (control), L1, L2, L1P, L2P, L1PK and L2PK. The experiments were laid out in Randomized Complete Block Design (RCBD) with 4 replications. The doses of lime were 0, 1 and 2 t ha-1 for both locations. The P was 20, 13 and 6 kg ha-1 for Wheat-Mungbean-T.aman at HSTU and 25, 22 and 12 kg ha-1 at FF respectively. The rate of K was 80, 32 and 50 kg ha-1 at HSTU and 61, 30 and 42 kg at FF. Other nutrients i.e. 15-100 kg N, 8-15 kg S, 1-2 kg Zn and 1-1.5 kg B were applied as basal irrespective of crops and locations on soil test basis (FRG 2012). Lime was added to the first crop only and its residual effects were evaluated on the succeeding crops over 2-crops cycles. The chemical fertilizers Urea, TSP, MoP, Gypsum, Zinc Sulphate and Boric acid were used as sources of N, P, K, S, Zn and B respectively. The varieties used were BARI Gom-26 for wheat, BU Mung-4 for mungbean and BRRI dhan57 for T.aman. Soil and plant samples were collected and analyzed. Application of lime, P and K significantly increased the growth and yield contributing characters, grain and straw yields of all crops irrespective of patterns at both locations. The direct and residual effects of lime were more prominent on crop yields followed by K and then P. The performance of different treatments was better at HSTU farm than Farmer’s field (FF). The yield of L1PK treatment was the highest; which was followed by L2PK for all crops and locations. In general, the crop yields of FF were relatively low due to higher acidity. The total uptake of P by crops was lower than the applied amount but the uptake of K was much higher than the added amount. The uptake of N, S, Fe, Mn, Zn and B were increased with the increase in yield due to different treatments. Soil pH was increased by 0.4-1.21 units irrespective of location and the higher values were observed with higher rates of lime application. The available P was increased in P treated plot and decreased in P control plot. The status of exchangeable K remained almost unchanged in treated plot but decrease in control plot. The status of available Zn, B, Fe and Mn were decreased over initial status but the status of total N and available S remained almost unchanged due to cropping and fertilization. The highest gross margin and BCR was found due to L1PK treatment for all crops and locations and this was followed by L2PK. Wheat-Mungbeam-T.aman cropping pattern was found more profitable than Wheat-fallow-T.aman cropping pattern. Economic analysis also showed dominance of 1 t ha-1 lime with P and K (L1PK) treatment combinations than others. This study recommends that amendment of soil with lime (dolomite) @ 1 t ha-1 with PK fertilizer inclusion of legume crop in cropping pattern might be an efficient practice for achieving sustainable soil fertility and crop yield in Old Himalayan Piedmont Plain (AEZ-1) and North Eastern Barind Tract (AEZ-27) soils of Bangladesh. EFFECTS OF LIME, PHOSPHORUS AND POTASSIUM ON CROP YIELDS OF DIFFERENT CROPPING PATTERNS IN ACID SOILS; A Dissertation Submitted in accordance with the requirements of the Hajee Mohammad Danesh Science and Technology University, Dinajpur for the degree of DOCTOR OF PHILOSOPHY By MD. SADEQUL ISLAM, Reg. No. 1105046, Year 2011, Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur; May 2016. Sun, 01 May 2016 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2165 2016-05-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2135 EFFECTS OF ORGANIC AMENDMENTS ASSISTED PHYTOREMEDIATION POTENTIAL OF LEAD CONTAMINATED SOIL BY MAIZE TONNI, MST. NURE FATEMA Phytoremediation, the use of plants and their associated microbes for environmental cleanup, has gained acceptance in the past 10 years as a cost-effective, noninvasive alternative or complementary technology for engineering-based remediation methods. Plants can be used for pollutant stabilization, extraction, degradation, or volatilization. This study evaluated the effects of organic amendments to enhance phytoextraction of heavy metal lead (Pb) from artificially polluted soil by maize (Zea mays). The objective of this study was to investigate the impacts of altered soil chemical properties (soil pH, OM, cation exchange capacity, electrical conductivity, base cation (Ca, Mg, K and Na) on phytoremediation of Pb contaminated soil due to application of compost, biochar, ash, poultry litter and co-compost. The treatments were a) control with 200mg Pb, b) Pb contaminated soil with compost 100g (10%), c) Pb contaminated soil with ash 100g(10%), d) Pb contaminated soil with biochar 100g (10%), e) Pb contaminated soil with poultry litter 100g (10%), f) Pb contaminated soil with co-compost (10%) and replicate three times in a completely randomized design. The results indicated thatthe compost, poultry litter significantly enhanced the growth ratio and plant heightof maize under Pb contaminated environment. Ash and biochar increased plant height same as control. Biochar and COMBI increased total amount of plant available P and N. Compost, ash, poultry litter showed the same effect on total phosphorus and nitrogen which was greater than the control. In case of soil pH, the sequence is: poultry litter> COMBI> compost> biochar>ash>control. For soil OM: compost>COMBI> biochar> control> poultry litter>ash. For soil EC: compost>poultry litter>COMBI>ash> biochar>control and soil CEC: compost>poultry litter>COMBI>biochar>ash>control. Moreover, compost enhanced base cations like Ca, Mg greater than ash, biochar, poultry litter, co-compost. Poultry litter accelerated base cations like K, Na compared to control. Therefore, it can be suggested that application of organic amendments like biochar, compost, ash, poultry litter, co-compost was the most suitable choice for the treatment of Pb contaminated soil phytoremediation. EFFECTS OF ORGANIC AMENDMENTS ASSISTED PHYTOREMEDIATION POTENTIAL OF LEAD CONTAMINATED SOIL BY MAIZE; A THESIS BY MST. NURE FATEMA TONNI, Student No. 1501363, Session: 2022-2023, Semester: July-December 2023; MASTER OF SCIENCE IN SOIL SCIENCE, DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR-5200; DECEMBER, 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2135 2023-12-01T00:00:00Z http://103.7.193.12:8080/xmlui/handle/123456789/2134 EFFECT OF DIFFERENT ORGANIC FERTILIZERS ON NAPA SHAK (Malva verticillata L.) RINA, MOST. AKTER An experimental study was carried out in the Soil Science Research Field of Hajee Mohammad Danesh Science and Technology University (HSTU) in Dinajpur, Bangladesh, from November 2022 to February 2023. The objective was to assess the effects of several organic manures, as well as their combination, on the growth of Napa Shak. The investigation encompassed six distinct treatments: T1 = Control, T2 = Compost (2.5 t ha-1), T3 = Cow dung (5 tha-1), T4 = Vermicompost (1.25 t ha-1), T5 = Northan organic fertilizer (0.50 t ha-1), T6 = Poultry manure (5 t ha-1) was applied. The experiment follows a randomized complete block design (RCBD). Data was gathered on the following parameters: plant height (in cm), fresh shoot weight (in g), fresh root weight (in g), and the presence of post-harvest soil S (in ppm), P (in ppm), exchangeable K (in meq 100 g-1 of soil), total N (%), pH, OC (%), and OM (%). The study analyzed the impact of different organic fertilizers on the growth of Napa Shak. The highest plant height was observed at 15 DAS, 30 DAS and harvest, with T6 (poultry manure) having the highest height at 14.13, 17.40 and 21.43 cm respectively and lowest from T1was 6.37, 8.40 and 8.40 cm respectively. The highest fresh weight (3.28 g) was also observed, with T6 having the highest root weight (0.16 g). The highest N content was found in T6 at 0.16 %, followed by T5, T4, and T3 and the lowest from T1 0.09%. The highest available P was 24.33 ppm from T6 and the lowest from T1 (9.68 ppm) with having the highest available S at 16.08 ppm and lowest from T1 (7.03 ppm). T6 also had the highest OC and OM values at 0.67 and 1.17 %, with T6 treatment following T5, T3, T4, and T2 were 0.58, 0.56, 0.54 and 0.54 % respectively in terms of OC and OM and lowest form T1 (control). The study concluded that T6 fertilizer poultry manure at a rate of 5 t ha -1 produced the maximum growth of Napa Shak. Further research is needed to determine the regional adaptability of this study. EFFECT OF DIFFERENT ORGANIC FERTILIZERS ON NAPA SHAK (Malva verticillata L.); A THESIS BY MOST. AKTER RINA; Student No. 1601323, Session: 2021-2022, Thesis Semester: January - June, 2023; MASTER OF SCIENCE (M.S.) IN SOIL SCIENCE, DEPARTMENT OF SOIL SCIENCE, HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR, BANGLADESH; DECEMBER 2023. Fri, 01 Dec 2023 00:00:00 GMT http://103.7.193.12:8080/xmlui/handle/123456789/2134 2023-12-01T00:00:00Z