Impact of Long-Term Application of FYM and Fertilizer Nitrogen on Soil Aggregation and Aggregate Bound Nitrogen Fractions and Nitrogen Mineralization Pattern in Different Size Soil Aggregates: A Review
Saloni Yadav *
Department of Soil Science, CCS Haryana Agricultural University, Hisar- 125004, India.
Usha Kumari
Department of Soil Science, CCS Haryana Agricultural University, Hisar- 125004, India.
Dev Raj
Department of Soil Science, CCS Haryana Agricultural University, Hisar- 125004, India.
Mohit Sharma
Department of Soil Science, CCS Haryana Agricultural University, Hisar- 125004, India.
*Author to whom correspondence should be addressed.
Abstract
This review highlights the impact of long-term application of FYM and fertilizer nitrogen on soil aggregation and aggregate bound nitrogen fractions and nitrogen mineralization pattern in different size soil aggregates. Organic manures are an important factor to maintain the soil fertility level because soil organic matter is regarded as a key indicator when assessing soil quality. The integrated application of inorganic and organic amendments leads to increase in both the inorganic fractions (ammonical and nitrate nitrogen) as compare to their alone application. Organic manures and residues that are added to the soil increase the total nitrogen content of the soil by protecting it chemically and physically against microbial degradation. Through FYM and crop root biomass (rhizodeposition), organic matter and fertilizers have been added to the soil on a regular basis during the past 41 years, and the building of nitrogen shows that nitrogen is physically protected within macro aggregates.
Keywords: Fertilizer nitrogen, inorganic fertilizers, nitrogen mineralization, soil organic matter