INSEY OFIT Trials 2001
 
Plot Activity Chickasha Perkins Covington Lahoma Blackwell Ciudad Obregon click to see added pictures of Kyle Freeman
planting date 03/10/00 17/11/00 01/10/00 27/11/00 01/12/00 19/12/00
variety Custer Custer Custer Custer Rayon 86
seeding rate, kg ha-1 67 76 54 76 76 60 
Sensor date 06/03/01 13/04/01 09/02/01 16/04/01 09/04/01 02/02/01
Days from Planting to Sensing 153 146 137 139 61 44
Days from Planting to Sensing (GDD>0) 116 76 69 60
preplant fertilization date 10/02/00 16/11/00 13/09/00 27/11/00 09/13/00
topdress fertilization date 13/03/01 18/03/01 22/02/01 19/04/01 12/04/01 05/02/01
harvest date 05/06/01 07/06/01 13/06/01 14/06/01
             
Preplant N rate, kg/ha Topdress N rate, kg/ha


Yield, kg/ha (N-rate, kg/ha)

 

0 0 1033 1274 1562 951    
0 45 1381 1353 1994 1312    
0 90 1438 1367 2461 1533    
45 45 1677 1607 2744 1894    
90 0 1776 1592 2329 2084    
0 NFOA 1410 (19.8) 1246 (58.4) 2553 (58.6) 1542 (50.9)    
0 1/2 NFOA 1197 (9.7) 1396 (33.4) 1966 (33.8) 1696 (24.4)
45 NFOA 1784 (15.4) 1519 (66.2) 3269 (104.3) 1823 (67.9)
SED 179 138 207 200
Soil Characteristics    
 
     
soil pH 7.06 5.9 6.1 5.6 6.82 8.2
organic C, g kg-1 7 9.91 8.64
total N, g kg-1 0.67 1.05 0.92 0.72
P, mg kg-1 132 8 19 21 45 67*
K, mg kg-1 800 193 181 345 410 513
NH4-N, mg kg-1 36 2.6 6.1 3.8 14.3 5.2
NO3-N, mg kg-1 9 2.7 1.4 2.8 18.2 20.0
Preplant P fertilizer applied, kg P, ha-1 9.2 2.7 1.4 2.8
Preplant N Fertilizer, kg N/ha 0 39 39 0 75
*Olsen NaHCO3 extract.
 

CIMMYT Collaborative Project from 1999

 
Nitrogen Use Efficiency, Nitrogen Fertilizers, NUE, Nitrogen and the Environment