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Applied and Environmental Soil Science
Volume 2015, Article ID 471248, 12 pages
Research Article

Seasonal Dynamics of N, P, and K in an Organic and Inorganic Fertilized Willow Biomass System

1Forest and Horticultural Crops Research Center, University of Ghana, Legon, Accra, Ghana
2Department of Forest and Natural Resources Management, SUNY College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA
3Department of Soil Science, University of Saskatchewan, Saskatoon SK, Canada S7N 5A8

Received 4 July 2014; Accepted 13 October 2014

Academic Editor: Rodrigo Studart Corrêa

Copyright © 2015 Amos K. Quaye et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The seasonal variations in soil nutrient supply and bioavailability were assessed in a willow biomass crop (Salix miyabeana, SX64) treated with 150 and 200 kg available N ha−1 of commercial fertilizer (CF), biosolid compost (BC), dairy manure (DM), and control (CT0) at Delhi, NY. Plant root simulator probes were used to measure nutrient supply (inside) and bioavailability (outside) of root exclusion cylinders. Measurements were made in September 2008 and May, August, and October of 2009. Soil moisture content (θd) and foliar nutrient concentrations were also determined. The BC treatments increased soil P supply more than CF and CT0. The supply of and K in the soil increased in August but their bioavailability increased in May and October. Soil and P supply and bioavailability were both high in May. Foliar N and K concentrations were significantly high in May and low in August which could be due to dilution effect caused by increased soil moisture foliar dry weight. Foliar P concentrations increased in September and October. The observed higher soil mineralization and plant uptake in May suggest that in high soil conditions willow biomass crops can level and minimize leaching out of the root zone into groundwater.