Abstract
<p>Nutrient leaching from dry (COD) and wet (COW) coffee, sisal (SIS), brewery barley malt (BEB) and sugar cane (FIC) by-products, and linseed (LIC) and niger seed cakes (NIC), and uptake by maize were studied in a pot experiment with tropical Alfisol. After three months, soils were leached to recover labile plant nutrients, and root and shoot biomass was harvested. The leachate from FIC-amended soil had the highest concentration of inorganic P (0.90 μmol L<sup>-1</sup>), whereas the highest concentrations of potassium (K) (48,088 μmol L<sup>-1</sup>) and calcium (2566 μmol L<sup>-1</sup>) were determined in leachates from COD and BEB treatments, respectively. The amendments significantly increased K uptake by maize proportional to the amount of K applied, but the effects for other plant nutrients were small. The results indicated that pre-decomposition of agro-industrial by-products may increase the nutrient release in tropical soils.</p>
| Original language | English |
|---|---|
| Journal | Archives of Agronomy and Soil Science |
| DOIs | |
| Publication status | Published - 2012 |
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