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Chaudhary Sarwan Kumar Himachal Pradesh Agriculture University, Palampur

Himachal Pradesh Krishi Vishvavidyalaya (renamed as Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya in June, 2001) was established on 1st November, 1978.The College of Agriculture (established in May, 1966) formed the nucleus of the new farm University. It is ICAR accredited and ISO 9001:2015 certified institution. The Indian Council of Agricultural Research has ranked this University at eleventh place among all farm universities of the country. The University has been given the mandate for making provision for imparting education in agriculture and other allied branches of learning, furthering the advancement of learning and prosecution of research and undertaking extension of such sciences, especially to the rural people of Himachal Pradesh. Over the years, this University has contributed significantly in transforming the farm scenario of Himachal Pradesh. It has developed human resources, varieties and technologies and transferred these to farming community enabling the State to receive the “Krishikarman award” of Govt. of India four times in row for food grain production among small states of the country. Today, the State has earned its name for hill agricultural diversification and the farming community has imposed its faith in the University.

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Subject: Soil Science and Agriculture Chemistry × Author: Baghla, Devanshi × End date: 2023 × Start date: 2021 ×
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    ThesisItemOpen Access
    Effect of foliar bio-nano P and K applications on nutrient optimization and soil productivity in maize-wheat cropping system in an acid Alfisol.
    (CSK HPKV, Palampur, 2023-01-01) Baghla, Devanshi; Sharma, V.K.
    In modern agriculture, nano fertilizer use is being popularized throughout the world because of its higher nutrient use efficiency in comparison to non nano/conventional fertilizers. To assess the possibility of using bio-nano P and K fertilizers alone or in combination with conventional fertilizers and their impacts on fertilizer nutrient economy/optimization and soil health attributes in maize-wheat sequence, a field experiment was conducted in acid Alfisol during 2019-20 and 2020-21 with fourteen treatments and three replications in Randomized Block Design. The treatments comprised of basal conventional P and K fertilizer applications, each at three levels (0, 50 and 100 per cent of their recommended levels), with and without two post-emergence bio-nano fertilizer sprays. In addition, there were two treatments to assess the compatibility of bio-nano P and K sprays at 50 and 100 % of recommended levels of both nutrients. Natural farming practice was also applied as a check treatment. Through statistical analysis of year-wise and pooled data, it was observed that yield attributing characters (plant height, cob/spike length, no. of grains per cob/ spike and test weight), grain yields and nutrient uptake of maize and wheat increased significantly with increasing levels of P and K application through conventional fertilizers alone or along with bio-nano foliar sprays. Lowest and highest values of each were found with natural farming and P100K100 + bio nano P&K sprays treatment, respectively. Further, treatment combinations viz. P50 and P0 +bio-nano P, P100 and P50 + bio-nano P, K50 and K0+bio-nano K, K100 and K50 + bio-nano P and P50K50 + bio-nano P& K and P100K100 were found at par with each other in above mentioned parameters, which highlighted the effectiveness of bio-nano sprays as an effective nutrient supplying source to maize and wheat and for optimizing fertilizer nutrient requirement to the extent of 50 % of the recommended dose of P and K. Assessment of leaf nutrient status of maize and wheat during their critical growth stages supported that finding also. Like non-nano P and K fertilizers, their bio-nano foliar sprays have a positive effect on soil attributes affecting soil health. There was a significant improvement in bulk density, water holding capacity, water stable aggregates (> 0.06 mm), organic carbon, CEC, available nutrient status, MBC, dehydrogenase activity and microbial population. These attributes increased significantly with increasing levels of P and K application through conventional fertilizers alone or along with bio nano foliar sprays. Similar results were also observed on saloid-P, Al-P and Fe-P build-up in soils but with non nano P fertilizer application and on water soluble, exchangeable and non-exchangeable K build-up but with non nano K fertilizer application. However, bio-nano K application showed no significant effect on any inorganic and K fractions. The cost of cultivation of maize and wheat with fertilizer treatments involving non-nano fertilizer application alone were considerably lower than those with bio-nano sprays at all levels of P and K. Since cost of spraying of bio-nano sprays is considerably higher, fertilizer treatments involving non-nano fertilizer application Fertilizer treatments involving non-nano fertilizer application resulted in more net profits and B:C ratio. Highest B:C ratio was observed with P and K applications through non-nano fertilizers at recommended rates. Keeping in view the above-mentioned figures and facts it may be concluded that bio-nano sprays alone or in conjunction with conventional fertilizers optimized fertilizer P and K requirements of maize and wheat equivalent to 50 per cent of their basal application. However, this nutrient management intervention is less economically viable as compared to conventional fertilizers at current prices of bio-nano P and K fertilizers