Table 3: The effect of fertilizer additive on soybean injury 3 d after treatment (DAT) in the presence and absence (weed-free) of glyphosate, and total weed dry weight reduction of fertilizer additives tank-mixed with glyphosate at Novelty 28 DAT in 2004 and 2005. Data were combined over yearsa.

Fertilizer additivecRate Injury 3 DAT Total weedb dry weight reduction
(Kg K ha−1)Weed-freeGlyphosate tank mixtureGlyphosate tank mixture
(%)(%)

Non-treated00
Weed-free0d100
NIS193
NIS + DAS193
2.20188
0-0-62-0 8.82391
17.66690
2.20096
3-18-18-0 8.81396
17.64388
2.21188
0-0-25-17 8.83586
17.65684
2.20196
5-0-20-13 8.84687
17.66685
LSD ( )211

aAbbreviations: DAS: diammonium sulfate; NIS: non-ionic surfactant.
bWeed species included common lambsquarters in 2004, common ragweed in 2005, common waterhemp in 2004 and 2005, and giant foxtail in 2004 and 2005.
Total dry weight reduction was calculated as .
cFertilizer additives included 3-18-18-0 as %N-%P2O5-%K2O-%S, K phosphate + urea (NA-CHURS/ALPINE); 0-0-25-17, K thiosulfate; 5-0-20-13, K thiosulfate + urea-triazone (Trisert-K+, Tessenderlo Kerley); and 0-0-62-0, potassium chloride. All fertilizer additives with glyphosate included non-ionic surfactant.
dTreatment was not included.