• Forms of sulfur in soils~./ Mostly org.anic matter sulfur (>90%)./ Inorganic sulfates (S04 •..S) in

subsoil on clays, Fe & AI oxides./ -0.1 % of the Earth's crust.I 13th most abundant element

• Atmospheric sulfur-.I Up to 25 Ibs. S04-5 I acre I year.I Higher downwind from fossil fuel

burning industries

• Irrigation watersulfur-.I Great Plains: -30 Ibs. S I acre I year.I Highiy variable-Western USA:

6 to 2,000 Ibs. S I acre-ft. water,50 Ibs. S I acre-ft. ave.

.I Corn, 150 bu. I A 28 Ibs~ S I A

Corn grain, 150 bu 10 lbs, S

.I Wheat, 80 bu. I A... ··..··· 21 Ibs. S I AWheat grain, 80 bu.··· ..···..6 lbs. S

.I Soybean, 40 bu. I A 18 Ibs, S I ASoybean grain, 40 bu. ··· 4 lbs. S

.I Alfalfa hay, 8 tons I A.": ··38 Ibs. S J A

Sulfur-t

-(f)CI)..t:os::::-s:.•..a.CI)

"0

'0en

• Sandy loam A

~ Sandy loam B

k;;~·:.lSilt loam

o Clay loam

Fine sandy loam

Delmarva, C,orn(combination of 4 locations)

-SulfurRf!te

Ibs.lA.

o

Ear Leaf I Ear LeafN S I N:S%) I 0/0

2.70 0.26 11.2

GrainYieldbu.lA.

146

25 2.78 0.27 11.3 149

50 2.79 0.29 10.5 154

100 2.82 0.30 9.6 150

-I I0 30 60 90

I 200 I 2.85 I 0.31 I 9.9 149Soil 504-5 (ppm) ... '-.- -=~=>-.~~, ._-- ~ .' --. - ._- -

Sulfur-2

Sources of Atmos,pheric Sulfur (502)

Worldwide emissions, 1971tons SI}!L

Fossil fuel combustion ·········100,000,000Petroleum processing 30,000,000Ore smelting 17,000,000

USA .Canada .Europe· .. ·..· .

13,000,0003,300,00034,000,000

USA emissionstons SIJlL

1972 16,000,0001980 13,000,0001990 12,500,000

Based on1995 504--5 data & 1996 rainfall

2.0

1.5CI)lo..0co-V? 1.0~0(J)

U)..c0.5-

0.0-.~~~ ':)v~'?I ~~~ ~~~. ~~\,. oy\'·

Perfect timing for when needed.

Sulfur-S