Evaluation of enhanced efficiency fertilizers for wheat and corn
The objective of this research is to evaluate the performance of N and P enhanced efficiency fertilizers in wheat and corn production at two locations of the Argentinean Pampas. Field experiments would be established for wheat and corn in 2009/10 and will be repeated in the 2010/11 and 2011/12 growing seasons.

1. Wheat

Three field experiments were established to evaluate NSN. Experiments are located at two sites (Figure 1):

· INTA Parana (1 trial) (northern Pampas)

· INTA Balcarce (2 trials) (southern Pampas)

T1: Check

T2: N 100 as urea

T3: N125 as urea

T4: N150 as urea

T5: N100 as urea + NSN

T6: N125 as urea + NSN

T7: N150 as urea + NSN

Measurements will include:

· Soil analysis at planting: pH, Bray 1 P, OM, and nitrate-N (0-60 cm)

· Canopy reflectance

· Chlorophyll with SPAD meter

· Dry matter accumulation

· Total N uptake

· Grain yield and grain N.

Two field experiments were established to evaluate NSN and Avail. Experiments are located at two sites (Figure 1):

· INTA Parana (1 trial) (northern Pampas)

· INTA Balcarce (1 trial) (southern Pampas)

T1: Check

T2: Triple superphosphate (TSP)

T3: TSP/Avail

T4: Urea

T5: Urea + TSP

T6: Urea + TSP/Avail

T7: Urea/NSN

T8: Urea/NSN + TSP

T9: Urea/NSN + TSP/Avail

Treatments are set in a randomized complete block design with 3 replications.

Measurements will include:

· Soil analysis at planting: pH, Bray 1 P, OM, and nitrate-N (0-60 cm)

· Canopy reflectance

· Chlorophyll with SPAD meter

· Grain yield, and grain N and P.