Slide2:
Winter wheat jointing boot anthesis ripe FS 4 N Uptake
~ 120 lb per acre
maximum within
~ 10 days
complete within
~ 45 days
Slide3:
Winter wheat following:
Slide4:
15NH4NO3
or
NH415NO3
Slide5:
Winter wheat N uptake - previous crop 1997
Slide6:
Impact on fertilizer use efficiency
Slide7:
Impact on soil-derived N
Slide8:
PRS Probe NO3 - in unfertilized wheat
Slide9:
Rainfall and soil water content, 10 °C 6 °C
Slide10:
N Uptake by wheat plants vs. soil tests
Slide11:
PRS Probe K - in unfertilized wheat = 25
= 37