Corn Fertilizer Program Comparison – 4 year avg.

Experiment Info

Planted  5/12/2014
Harvest  10/22/2014
Yield Goal  170 bu/A
Target Fert.  175-30-60
Variety  DKC 53-56 RIB
Population  34,000
Row Width 30″
Prev. Crop  Soybeans
Plot Size  15 x 210
Replications 4
 Potash:  10/29/2013
 Dry BC:  5/5/2014
 Urea:  5/6/2014
 Sidedress:  6/9/2014

 

Soil Test Values (ppm)

 pH 6.1
CEC 11.6
%OM 2.5
Bray P1 13
Bicarb P
K 118
S 9
%K 2.6
%Mg 17.4
%Ca 65.8
%H 13.8
Zn 1.3
Mn 8
B 0.4

Objective:

Compare different fertilizer programs for corn and soybeans grown in rotation in the same designated plots yearly.

An experiment was established in 2011 comparing different corn and soybean fertilizer programs in adjacent sites.

Nitrogen only: 47 gal/A 28% + eNhance (sidedress or SD)

AgroLiquid: 3 gal/A Pro-Germinator + 5 gal/A Sure-K + 2 qt /A Micro 500 (in furrow); 47 gal/A 28% + eNhance (SD)

Low Rate Conventional (to match AgroLiquid actual lb of nutrients/A): 20 lb/A 0-0-60 (following soybeans); 2 gal/A 10-34-0 + 1 qt/A 9% Zn + 1 qt/A 9% Mn (in furrow); 47 gal/A 28% UAN (SD)

Conventional liquid/dry: 200 lb/A 0-0-60 (following soybeans); 7.5 gal/A10-34-0 + 1 qt/A 9% Zn + 1 qt/A 9% Mn (in furrow); 47 gal/A 28% UAN (SD)

Conventional dry: 200 lb/A 0-0-60 (following soybeans); 365 lb/A urea + 65 lb/A DAP + 2 lb/A zinc (preplant inc).

fertilizer program comparison 4 year yield average

Conclusions:

  • All of the complete fertilizer treatments where P, K and micros are applied yielded higher than the N only.
  • The AgroLiquid treatment has the highest average yield over the four test years.
  • The yield with the low rate conventional fertilizers has the lowest yield of the complete fertilizer treatments, even though it has the same lb/A application of nutrients as the AgroLiquid treatment. This would suggest that there are in fact, differences in formulations that has an effect on yield.