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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(9): 299-312
DOI: https://doi.org/10.20546/ijcmas.2019.809.036


Crop Productivity and Soil Biological Properties Influenced by Long Term Application of Mineral Fertilizers and Manures under Rice-Wheat Sequence on Mollisols of Northern India
Vineet Kumar*, Shri Ram and Ramesh Chandra
Department of Soil Science, G. B. Pant University of Agriculture and Technology Pantnagar- 263 145 Uttarakhand, India
*Corresponding author
Abstract:

The rice-wheat cropping system, which is considered as the backbone of food self-sufficiency, is facing a sustainability problem due to practices of modern production system with indiscriminate use of chemical fertilizers and pesticides. Effects of long term use of mineral fertilizers and farmyard manure (FYM) under rice (Oryza sativa)–wheat (Triticum aestivum) cropping system in a Mollisol. Rice and wheat yields were highest (51.47 and 48.60 q ha-1, respectively) with 100% NPK + 15 t FYM ha−1 and lowest in control (13.72 and 11.85 q ha-1, respectively). Balanced fertilizers use of (100% NPK + Zn) was also at par with 100% NPK + FYM treatment in rice and wheat yields. The FYM amended treatment gave the highest and significantly more counts of bacteria, fungi and actinomycetes in all four depths of soil (0-15cm, 15-30cm, 30-45cm and 45-60cm) as compared to all other treatments after crop harvest. The observed microbial biomass C with 100% NPK + FYM in four soil depths were (413.36, 193.50, 100.11 and 66.41 after rice and 435.93, 235.54, 142.64 and 82.41 µg g-1 after wheat, respectively, which was highest and significantly higher over all other treatments. Soil enzymes dehydrogenase, acid and alkaline phosphatase and urease activities were significantly higher with 100% NPK + 15 t FYM ha−1 than all the other treatments. Mineral fertilizer treatments with 100% NPK and 150% NPK were comparable and significantly better than application of 50% NPK, 100% N and 100% NP in different soil biological properties. Application of Zn with 100% NPK increased the crop yields and soil biological properties over 100% NPK. Imbalanced use of mineral fertilizers had the harmful effect on soil biological health.


Keywords: Crop productivity, Fertilizers, Manures, Rice-Wheat Sequence, Mollisols
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How to cite this article:

Vineet Kumar, Shri Ram and Ramesh Chandra. 2019. Crop Productivity and Soil Biological Properties Influenced by Long Term Application of Mineral Fertilizers and Manures under Rice-Wheat Sequence on Mollisols of Northern India.Int.J.Curr.Microbiol.App.Sci. 8(9): 299-312. doi: https://doi.org/10.20546/ijcmas.2019.809.036