
TY  - JOUR
A1  - Blair, GJ 
A1  - Dana, M 
A1  - Lefroy, R 
T1  - A glasshouse evaluation of sulfur fertilizer sources for crops and pastures. II. A comparison of sulfur coated triple superphosphates and gypsum
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1994
VL  - 45
IS  - 7
SP  - 1517
EP  - 23
KW  - gypsum;elemental S;coated fertilizers;pasture fertilization
UR  - https://doi.org/10.1071/AR9941517 
N2  - In many parts of the world it has become more economical to use triple superphosphate (TSP) rather than single superphosphate (SSP) as a pasture fertilizer where only P deficiency exists. Coating TSP with elemental S is an attractive alternative to SSP for situations where P and S deficiency exists. A pot experiment was conducted on an S deficient Aquic Haplustalf soil to compare the ability of gypsum (G) and S coated TSP to supply S to a ryegrass/white clover pasture over 14 repeated harvests over a 96 week period. The adhesives used to coat S to TSP were UNE1, UNE3, UNE2 and a commercial product (HF). The reverse dilution 35S technique was used to calculate fertilizer S uptake. Total yields were highest with G and UNE1. Total fertilizer S recovery by the pasture was 64.4% for G and 52.3% and 52.9% for UNEl and UNE3 respectively. These amounts were significantly higher than from UNE2 or HF. The time course of fertilizer S release varied between products and shows that bonding method can affect S availability from S coated TSP products. 
ER  -

