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ThesisItem Open Access Persistence, mitigation and leaching of atrazine and its metabolites in soil(CCSHAU, Hisar, 2023-01) Priyanka; Duhan, AnilPersistence, mitigation and leaching potential of atrazine and its metabolites in sandy and clay loam soils was studied. Soil samples were collected periodically for dissipation and mitigation studies. Leaching experiment was performed at 50 μg (single dose) and 100 μg (double dose) in both soils taken in plexi glass columns. Enzymatic activities were studied as per the explained method in available literature. Sample preparation techniques i.e. Matrix solid phase dispersion (MSPD), was optimized using different solvents for both soils at fortification level of 0.001 μg/g for sample preparation. The limits of detection and quantification were ranged 0.0005-0.001 and 0.001-0.005μg/g, respectively for AT and metabolites. In clay loam and sandy loam soil, average recoveries of atrazine and metabolites ranged from 81.3-83.1% and 84.2-86.3%, respectively in methanol. Dissipation followed first-order kinetics. The residues reached below detectable limit after 30 and 60 days in sandy loam and clay loam soils, respectively. Presence of organic manures stimulated while BGC inhibited the dissipation of atrazine in both soils. Urease activity decreased up to 30 days and boosted thereafter up to 60 days in all treatments of clay loam soil. AT exhibited deleterious effect on urease activity up to 30 DAT followed by DEA and DIA in clay loam soil. AT and DEA stimulated while DIA inhibited DHG activity on 0 DAT in comparison to control. The residues of atrazine and its metabolites found in leachate fractions suggested about its highly mobile nature, and possible threat of surface and ground water contamination. The presence of a notable collection of residues in leachate fractions suggests the potential for surface and groundwater contamination. DEA and DIA metabolites, in particular, caused springtail Folsomia candida and earthworm Eisenia fetida to have longer and more unacceptable risks. If residues similar to those found in leachate fractions reach water bodies, they may be toxic to a variety of freshwater fish, aquatic arthropods, amphibians, and aquatic invertebrates. Future research should take a more comprehensive approach to assessing ecological health and potential threats to non-target species.ThesisItem Open Access Impact of nutrient management practices on soil organic carbon fractions under cereal based cropping systems(CCSHAU, Hisar, 2023-07) Priyanka; Dhram PrakashAn on-going field experiment started in Kharif 2020 at Research Farm, Department of Soil Science, CCS HAU, Hisar (India) was selected for present study. The soil samples were collected after harvest of moong in the month of July, 2022. Irrespective of the nutrient management practices, soil organic carbon (SOC) fractions i.e. SOC (7.3 mg kg-1), hot water soluble C (HWSC: 209.25 mg kg-1), dissolved OC (DOC: 41.85 mg kg-1), total OC (TOC: 8.5 mg kg-1), microbial biomass C (MBC: 395.42 mg kg-1), MB nitrogen (MBN: 41.45 mg kg-1), available N, P, K and micronutrients were higher in soils under maize-potato-moong cropping system. Soil electrical conductivity (EC) and available S were higher in soils under pearl millet-wheat cropping system. Soil pH and less labile C were highest in soils under maize-potato cropping system. Plots under pearl millet-chickpea cropping system exhibited significantly higher very labile C, labile C and recalcitrant C content. The results showed that application of organic nutrient source (FYM) + residue retention (RR) relatively reduced soil pH (7.86) as compared to inorganic sources applied alone or in combination with RR and, a reverse trend was obtained for soil EC. Significantly higher soil EC (0.40 dSm-1), HWSC (254.16 mg kg-1), DOC (50.84 mg kg-1), SOC (7.5 mg kg-1), TOC (8.9 mg kg-1), MBC(448.91 mg kg-1) and available Fe (20.50 mg kg-1), Mn (9.70 mg kg-1), Cu (1.35 mg kg-1) and Zn (1.83 mg kg-1) were found under treatment received organic nutrient source + RR over the other nutrient management practices. Combined use of inorganic nutrient sources and RR showed higher availability of P (20.97 kg ha-1) and K(426.00 kg ha-1) followed by sole application of inorganic nutrient sources (available P: 19.96 and available K: 417.7 kg ha-1). Application of inorganic nutrient sources coupled with RR showed beneficial impacts on availability of N (173.25 kg ha-1) and MBN (46.70 mg kg-1) as compared to sole application of organic nutrient source. Application of organic or inorganic nutrient sources along with RR helped to improve soil physico-chemical and microbial properties. Inclusion of nitrogen fixing legume i.e. moong has enhanced the soil OC fractions and improved nutrient availability. Therefore, nutrient management practices and choice of crops under intensive cropping systems could lead to improve the soil health.ThesisItem Open Access Social Isolation and Cognitive Functioning in Later Life(Chaudhary Charan Singh Haryana Agricultural University hisar, 2022-07) Priyanka; Sangwan, SheelaSocial isolation is a state of complete or near-complete lack of contact between an individual and society. It differs from loneliness, which reflects temporary and involuntary lack of contact with other humans in the world. Social isolation can be an issue for individuals of any age, though symptoms may differ by age group. Cognitive functioning refers to a person's ability to process thoughts. It is defined as "the ability of an individual to perform the various mental activities most closely associated with learning and problem-solving. Researchers like Cacioppo and Hawkley (2009) have highlighted the strong association between social isolation and cognitive functioning. This paper investigates the social isolation and cognitive functioning in later life. The effects of depression, anxiety and stress were explored. An intervention programme to improve the cognitive functioning of low performing elderly was imparted. The study was conducted in the rural and urban areas of Hisar, Rohtak and Karnal district of Haryana state. The results revealed that age, education and occupation, marital status and family type significantly influences the respondent’s performance. The socio-personal variables and supporting variables are the strong predictors which influence the social isolation and cognitive functioning of elderly. Depression was found to be significantly correlated with both social isolation and cognitive functioning of elderly. The findings suggest that the imparting the intervention programme may enhance the cognitive functioning in elderly.ThesisItem Open Access Development and Evaluation of Value Added Products incorporating Khejri (Prosopis cineraria) Pod Powder(CCSHAU,HiSAR, 2021-07) Priyanka; Sindhu, Sangeeta CThe present investigation was carried out to study the nutrient composition of Prosopis cineraria pod powder, development of products using Prosopis pod powder, their sensory and nutritional evaluation and studying the shelf life of the developed products. Ripe pods of Prosopis cineraria were subjected to oven drying and made into powder. Prosopis pod powder was analyzed for physico-chemical properties and nutritional composition. Four products namely biscuits, cake, sev and laddoo were prepared by substituting control flour with Prosopis pod powder at 10, 20 and 30% level of incorporation. Developed products were subjected to sensory evaluation and most acceptable products were analyzed for nutritional composition. Most acceptable biscuits and sev were also subjected to shelf-life evaluation during one month of storage period. Data was statistically analysed using SPSS and OPSTAT software. The water absorption capacity, oil absorption capacity and swelling power of Prosopis pod powder were observed as 2.24, 1.47 and 4.2g/g, respectively. The sedimentation value of Prosopis pod powder was observed to be 10.23ml/g.Prosopis pod powder contained 3.83, 19.64, 2.75, 17.35, 5.22 and 55.04 per cent of moisture, crude protein, crude fat, crude fibre, ash and total carbohydrates, respectively. Soluble, insoluble and total dietary fibre in Prosopis pod powder were found to be 9.47, 17.91 and 27.38 per cent, respectively. Total soluble sugars, reducing sugars and strach of Prosopis pod powder were noticed as 28.94, 3.67 and 13.25 per cent, respectively. Antioxidant activity (DPPH) and phytic acid content of Prosopis pod powder were observed as 64.94 mgTE/100g and 71.49 mg/100g, respectively. Prosopis pod powder contained 351.9, 519.3, 95.67, 897.97, 24.53 and 2.19 mg/100g of total calcium, phosphorus, magnesium, potassium, iron and zinc, respectively. The HCL extractable contents of calcium, phosphorus, magnesium, potassium, iron and zinc in Prosopis pod powder were observed to be 104.47, 179.46, 28.83, 351.35, 6.37 and 2.19 mg/100g, respectively. It was found that potassium had significantly highest per cent extractability (39.13%) among all the minerals. The organoleptic scores showed that biscuits, sev and laddoo were found most acceptable at 10% level of incorporation of the pod powder while the incorporation level 20% was found to be most acceptable for cake. The value added products had significantly higher protein, crude fibre, mineral content and antioxidant activity than control. Shelf life study of most acceptable products (biscuits and sev) was done. Significant (p≤0.05) differences were observed between control and Prosopis pod powder supplemented products in terms of lipase activity, peroxide value and total plate count during one month of storage period. Shelf-life study indicated that products could be stored well and microbiologically safe throughout the storage period. From the present study it is concluded that all the Prosopis pod powder supplemented products were found to have better nutritive value and shelf life than their controls. Commercialization and promotion such functional food commodities helps to tackle malnutrition and hidden hunger among the population.
