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Title: | Changes in organic and inorganic forms of nitrogen in a typic haplustert under soybean-wheat system due to conjoint use of inorganic fertilizers and organic manures |
Other Titles: | Not Available |
Authors: | Tabassum, Shahina, Sammi Reddy, K., Vaishya, U.K., Singh, Muneshwar and Biswas, A.K. |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR-CRIDA Hyderabad |
Published/ Complete Date: | 2010-03-01 |
Project Code: | Not Available |
Keywords: | Organic and inorganic N fractions, soybean-wheat system, Vertisol, organic manures |
Publisher: | Indian Society of Soil Science |
Citation: | Not Available |
Series/Report no.: | Not Available; |
Abstract/Description: | Under soybean-wheat system the influence of 4-year continuous cropping with different fertilizer and organic manure inputs on the transformation of different N fractions, mineralizable N, total N, and organic C in both surface and subsurface soils was investigated in a Vertisol. Repeated applications of fertilizer N alone, N with FYM or poultry manure or urban compost, FYM alone led to a significant increase in organic C, total N, hydrolysable N (i.e., amino acid N, hydrolyzable NH4-N, hexose amine N) and nonhydrolysable N in both surface and subsurface soils as compared to initial status. The status of various organic N fractions was higher in surface than the subsurface soils. On the other hand, continuous cropping without fertilization and manuring resulted in depletion of total hydrolysable N in control over the initial status by 8.5% in surface soils and 6.4% in the subsurface soils. About 3–6% of total N in surface soils and 2–5% of total N in subsurface soils got mineralized under waterlogged incubation conditions. The results clearly indicate that the subsurface soils in addition to surface soils also substantially contributed to the N requirement of the crops. The correlation studies revealed that the amino acid and hexose amine N fractions in surface soils and hydrolyzable NH4-N and amino acid N fractions in subsurface soils were better indices of soil N mineralization. This was further supported by a better correlation between amino acid N in surface and hydrolyzable NH4-N in the subsurface soils with yield of and N uptake by soybean and wheat crops |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Research Paper |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Journal of the Indian Society of Soil Science |
NAAS Rating: | 5.31 |
Volume No.: | 58(1) |
Page Number: | 76-85 |
Name of the Division/Regional Station: | DRM |
Source, DOI or any other URL: | Not Available |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/60378 |
Appears in Collections: | NRM-CRIDA-Publication |
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