| Summary: | ICA's soil program established four trials in Sugarcane, variety POJ 28-78 in Cocorná, Barbosa and
Arnagá (counties located in Antioquia). The red soils
of these places were slope, strongly acids, low to high
in organic matter (1,6 to 17,69o) and low in P-available (1,5 to 3,2 ppm-Bray II), Ca, Mg and K-exchangeable.
The main object of these trials was to study the
effect of different sources of phosphorus: Superphosphate (SF1), Thomas Slags (ET) and Rock Phosphate (RF) and two dosages (75 and 150 kg/Ha of
P205) in yields of sugarcane (TCA), sugar (TAH) and
saccharose concentration.
The results showed good yields (TCH and TAH)
and saccharose concentration with 75 - 150 kg/Ha of
P205 of SF1 and ET or 150 kg/Ha of P205 with RF
at planting time and first cut.
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