Soil fertility status of IUBAT’s agricultural research station, Rajendrapur, Gazipur

ABSTRACT

Twenty two soil samples (11 from 0-15cm and 11 from 15-30cm depths) were collected from IUBAT’s Rajendrapur Agricultural Research Station, Gazipur covering two depths and six sites representing               (I) vegetables, pulses and other crops, (II) wheat, rice and vegetable growing zone, (III) forest area, (IV) fruit growing zone, (V) maize cultivated area and (VI) lowland for boro cultivated area (Table 3-4). The soils were dried at IUBAT lab-2, ground, sieved and properly labeled. Twelve physical and chemical properties were studied at Humbold Soil Testing lab. BAU, Mymensingh. The morphological characteristics/description of the eleven representative soils is reported in Table 4. The soil properties studied covered textural classes (sand, silt and clay contents), particle density, pH, organic carbon, organic matter, N, P, K, S, EC, HCO3, Na and Ca contents. The soils were acidic (pH 5.49-6.01) light-red, brown, loamy types (loam, clay loam, silt loam, sandy loam etc.), organic carbon (0.637-1.950%), organic matter (1.102-3.374%), particle density (2.406 to 2.69gmcm-3, total N (0.072-0.187%), P (2.209-36.93ppm), K (0.104-0.209meq/100gm), S (10.14-43.00ppm), EC (33-164mS/cm), HCO3 (126-305ppm), Na (0.123-0.185meq/100g) and Ca (0.370-0.617meq/100gm). Minor variations of soil properties were recorded from soil to soil and surface (0-15cm) and sub-surface (15cm) depths where standard deviations (SD, minor values) confirmed the low variations of the results. As the soils are acidic with mostly forest vegetation where proper management system through various green manuring, and other manuring by various practices are essential for 2-5 years for developing sound land for growing of most agricultural crops for larger productions.

Key words: Soil fertility, physical and chemical properties of soils, nutrient contents, management.

Introduction

A universal concept “No soil no crop, no crop no food and no food no life” clearly and properly explain the importance of soil fertility. Soil, fertility is the capacity of soils to supply adequate/proper nutrients to crops. Practically, it is the inactive form of soil productivity i.e. a soil may be fertile but may or may not be productive. Through field and lab. analysis of soils under various conditions fertility can be confirmed. Polluted, hazardous and some problematic soils are not the fertile soils. Usually, all productive (growing of crops and vegetables) soils are the fertile soils but not all fertile soils are productive. Climate, rainfall, temperature, vegetation, drought, cyclone/tornato, erosion disasters etc. influences the soil fertility. Fertility is the originality of soils that rarely be changed naturally but through growing/improving of productive capacity-then fertility changes too. For studying of crop production works in the field usually basic studies of soil properties or soil fertility situation is important for all researchers where more than thousands of research works were done/completed with BAU soils by the MS and PhD students/researchers or different project works of the teachers in 1972-2023 where most of the these/reports are available at Univ. library. Sattar (CV) handled more than 100 soil fertility works for basic soil properties for supporting of main research and here 22 references (1-22) are listed dealing with fertility, productivity and other capacity and/or properties of soils. For proper crop growth, crop yield and food security soil fertility knowledge in important.

Ecological aspects of heavy metals in sediments of padma river in Bangladesh

ABSTRACT
The study was piloted to assess the ecological risk of heavy metals in sediments collected from the Padma River in Bangladesh during April to July 2022. The sediment samples were collected from five sampling sites and analyzed in the laboratory of the Soils Science, Dept. of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University using ICP-MS. The mean concentration of As, Cd, Cr, Cu, Pb and Zn in summer season were 0.59, 0.83, 7.10, 16.23, 5.53 and 44.60 mg/kg, respectively. In winter, the mean concentration of As, Cd, Cr, Cu, Pb and Zn are 1.59, 1.22, 10.37, 24.43, 8.07 and 66.97mg/kg, respectively. Metals concentrations were found below the recommended value set by different sediment quality guidelines except for Cd. Multivariate analysis demonstrated that the vast majority of the metals in agricultural sediments may originate from both anthropogenic and lithogenic activities. The contamination factor (CF), geo-accumulation index (Igeo) and potential ecological risk (PER) revealed that most of the soil samples were contaminated by Cd. The geo-accumulation index values showed that most of the samples were poorly contaminated by heavy metals. Sediment sampling sites showed low to moderate potential ecological risk (PER) in the context of PER. The results also described that the pollution load index (PLI) for all investigated samples were lower than the standard level but the growing number of industries may cause advanced
declinations of sediments. However, regular monitoring is needed for the documentation of any alternation in the quality of sediments and minimizes the damage to the benthic ecosystem.
Key words: Heavy metal, Sediments, Spatial distribution, Ecological Risk, Padma River

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Effect of ZN and B application on mustard at madhupur soil under aez 28

ABSTRACT

Mustard (Binasarisha-9) was evaluated against four Zn levels (0, 3, 6, 9 kg Zn ha-1) and three B levels (0, 2, 4 B ha-1) at Madhupur under AEZ 28. The results revealed that there was a significant improvement in the growth and seed yield with increasing level of B and lower Zn levels, respectively. The highest B level        (4 kg ha-1) and lower Zn level (3 kg ha-1)  resulted 96 cm plant height, 5.33 branches plant-1, 86.33 siliqua plant-1, 7.33 cm siliqua length, 28.33 seed siliqua-1 and 1633.30 kg seed ha-1. It is suggested that for achieving higher seed yields in mustard, the Zn application may be done at the rate of 3 kg ha-1 and with B of 4 kg ha-1.

Key words: Boron, Zinc, yield and mustard 

Introduction: The soil of Bangladesh has wide variation and complexity due to diverse nature of physiography, parent materials, land type, drainage conditions and agro ecology. Depending on these aspects, the country has been divided into 30 agro ecological zones (AEZ), which varied greatly in respect of area, land and soil, climate, and cropping intensity (FAO-UNDP, 1988). Some AEZs are very potential for crop agriculture and nutrient supplying capacity but some are being depleted due to intensive cropping. Madhupur Tract (AEZ 28) is one of them. The present study was concentrated to this AEZ which is a region of complex relief and soils are developed over the Madhupur clay. The landscape comprises of level upland, closely or broadly dissected terraces associated with shallow to broad deep valleys. Eleven general soil types exist in the area of which Deep Red Brown Terrace, Deep Red Brown Terrace soils and Acid Basin Clays are the major ones. The soils on the terrace are better drained, friable clay loams to clay overlying friable clay substratum at varying depths. Soils in the valleys are dark grey heavy clays. The top soils are mainly very strongly acidic in reaction but ranges up to slightly acidic with low to medium status of organic matter, low moisture holding capacity and low fertility level. The soils are mainly phosphate fixing low to medium in P, B and K; and medium to optimum in S content. The major land type comprises 56% highland and 18% medium highland (FRG, 2018). Texturally the soils are loam and sandy loam. Over the last 2-3 decades, enormous pressure has been exerted on the soil resource to produce more food for its population. Intensification of agricultural land use has increased remarkably and the cropping intensity has increased from 143% in 1971-72 to about 197% in 2016-2017 (Krishi Diary, 2021). In addition, cultivation of high yielding varieties for all crops has increased remarkably. Consequently, this has resulted in deterioration of soil fertility with emergence of micronutrient deficiency. In this country, chronologically N, P, K, S, Zn and B deficiencies have appeared in soils and crops of Bangladesh (Islam, 2008). Among the micronutrients, next to zinc, boron deficiency is prominent in soils of Dinajpur, Rangpur, Bogra, Sirajganj, Mymensingh, Comilla and Sylhet district (SRDI, 2010). The use of chemical fertilizers as the supplemental source has been increasing steadily but these are not applied in balanced proportion. Of the total fertilizer used in the country, urea alone constituted about 75% (FRG, 2012). Previous study indicated that about 60% cultivable land of Bangladesh is deficient in N, P and K (Miah et al., 2008). Moreover, organic matter content in country’s soils is low, the majority being below the thresh hold level (1.5%) and it was gradually depleted by 5 to 36% during the period of 1967-1995 (Ali et al., 1997). Islam (2008) mentioned that organic matter content in Bangladesh soils is generally around 1% in most and around 2% in few soils.

Pre and post-harvest soil nutrient status at rangpur sadar sugarcane field

ABSTRACT
An experiment was conducted at the farmer’s field at the Rangpur, during January-December 2018 to evaluate the nutrient status of pre and post-harvest soil of the sugarcane field. The experiments consisted of seven treatments viz., T0 = Control (No fertilizer), T1 = N165P55K120S30Zn2.5Mg20 (as per soil analysis), T2 = T1 + Dolomite (1 t ha-1),T3 = 50% of T1 + Poultry manure (10 t ha-1), T4 = 50% of T1 + Poultry manure (10 t ha-1) + Dolomite (1 t ha-1), T5 = 50% of T1 + Cowdung (12.5 t ha-1) and T6 = 50% of T1 + Cowdung (12.5 t ha-1) + Dolomite (1 t ha-1). Results revealed that all the treatments showed statistically more or less similar to each other in respect to pH (5.51-5.71), OM (1.70-1.88),Ca (3.00-3.82 me 100 g-1) and Zn (0.93 to 1.07 μg g-1) contents of the post-harvest soil. Total N contents were the highest in T5 (0.124%) followed by T4 (0.105%) while it was the lowest (0.085%) in T6.However, the highest available P, S, and Ca were found in those post harvest soil at Rangpur which treatment T5.
Key words: Sugarcane, initial soil, post-harvest soil.

Investigation of biodiversity status in accordance of simpson’s diversity index and its conservation strategy at Ramsagar national park in Dinajpur district of Bangladesh

ABSTRACT
The present study was designed to assess the biodiversity status at Ramsagar National Park (RNP) inDinajpur district, Bangladesh period from June 2019 to August 2020. Data on the diversity of the floral andfaunal species were gathered using the KII and FGD by forest-responsible persons especially bit officer andforest rangers. A total of 100 residents of the research area participated in a questionnaire survey to performthe study. The study’s findings revealed that 10.09% of climber species, 31.95% of herbs, 13.45.1% of shrubspecies, and 44.51% of tree species made up the total floral diversity. According to the study, RamsagarNational Park’s strong floral variety status was reflected by the Simpson’s diversity index value of 0.97. On
the other hand, 74.23% aves, 13.78% amphibians, 5.31% reptiles, 6.68% mammals and cultivated differenttypes of fish speciesin the aquatic body were found in Park. According to the result of Simpson’s diversityindex, the status of the faunal diversity is very rich and diverse which was 0.93. In the park, there werevarious barriers to the conservation of biodiversity and the growth of ecotourism viz. poor planning andmanagement, disregard for management authority, etc. The report recommended that the responsiblegovernment authority quickly take necessary action to increase staffing, obtain strongauthorization, includethe media, execute policies and regulations for conserving its biodiversity.
Key words: Biodiversity, conservation, simpsons’ index, eco-tourism, park

Selection in F2 progenies to evolve advanced generation desirable lines of tossa jute

ABSTRACT

The experiment was conducted with tossa jute (Corchorus olitorius L) at Jute Agricultural Experimental Station, Jagir, Manikgonj during 2019. Ten F2 cross combinations were included in this experiment. The mean, variance and range were computed for six morphological characters viz. plant height (m), base diameter (mm), green bark thickness (mm), green weight without leaves (g)/plants, fibre yield (g) /plants and stick yield (g)/plants. In this study the highest plant height was recorded from the cross, P5 x P2 (3.26 m), which was followed by the cross, P3 x P4 with 3.25 m. The ranges for two crosses were 2.75-3.63 m and 2.22-3.60 m, respectively. The highest base diameter and bark thickness was derived from the cross, P3 x P4. The highest green wt. without leaves was recorded 250.04 in the base population against the cross P8 x P4 and the character also the highest in the same cross with 262.87 in the selected population. The fiber weight was the maximum in the progenies of the cross, P8 x P4 (20.39 g) for the base population, also it was the highest for the same cross with 23.53g in selected population. The highest stick weight was obtained from the cross, P2 x P7 with 53.0 g in selected population, which was followed by the cross, P3 x P4 with 51.91g in selected population.The progenies of the cross, P8 x P4 (Acc-3860×Acc-2381) produced the highest fiber weight (23.53 g), which was followed by the cross, P3 x P4 (JRO-524×Acc-2381) further it produced the highest base diameter (20.16 mm), suggested the appreciable potential of the two crosses to evolve outstanding advanced lines of tossa jute in Bangladesh agriculture. 

Key words: Selection, segregating generation, tossa jute