Distribution of carbon, nitrogen and phosphorus in water-stable aggregates of an organic waste amended Ultisol in southern Nigeria

• Published in: Bioresource technology 2005-03, Vol.96 (4), p.509-516
• Main Authors: Adesodun, J.K., Mbagwu, J.S.C., Oti, N.
• Format: Article
• Language: English
• Subjects: Aggregate stability; Agronomy. Soil science and plant productions; Biological and medical sciences; carbon; Carbon - analysis; Carbon - chemistry; Fertility erosion; fertilizer application; food processing wastes; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Macromolecular Substances - analysis; Macromolecular Substances - chemistry; milling; Molecular Conformation; Nigeria; nitrogen; Nitrogen - analysis; Nitrogen - chemistry; NPK fertilizers; Organic Chemicals - chemistry; Other nutrients. Amendments. Solid and liquid wastes. Sludges and slurries; Particle Size; phosphorus; Phosphorus - analysis; Phosphorus - chemistry; poultry manure; rice; rice mill wastes; Soil - analysis; soil aggregates; soil amendments; soil degradation; soil organic matter; Soil-plant relationships. Soil fertility. Fertilization. Amendments; tropical soils; Ultisols; Waste Products - analysis; Water - chemistry; Water-stable aggregates
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2004.05.001

This study was undertaken to evaluate the effects of different organic and inorganic amendments on nutrient (C, N and P) distribution in water-stable aggregates (WSA) of a degraded tropical Ultisol at Nsukka in southern Nigeria. The treatments were control (C), inorganic fertilizer (F) (N–P–K, 12–12–17), rice-mill wastes (RW), RW + F, poultry manure (PM) and RW + PM. These were arranged in a randomized complete block design (RCBD) with four replications. At 0, 3, 6 and 12 months after application of the amendments, topsoil (0–20 cm) samples were collected from all the treatments, dried and separated into 4.75–2.0, 2.0–1.0, 1.0–0.5, 0.50–0.25 and