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Trial Results – oilseed

Efficacy of C-active Microbial Technology and NH Delta in oilseed rape (2013)

ADAS England

Trial type
Randomised block design with three replicates.

Late march
Hand-held sprayer with 3m boom in 200L of water / Ha
Applied between 6.30 and 7.00am in cloudy conditions at 6 degrees

TreatmentsAutumn AN (kg N/ha)Additional Autumn treatments (GS 1,3)Spring) AN (kg N/ha)Additional Spring Treatments
50C active % Push UPP120C active % Push UPP
60C active % Push UPP240C active % Push UPP
730C active % Push UPP120C active % Push UPP
830C active % Push UPP240C active % Push UPP
Autumn Treatment BiomassCrop N (t/ha)SMN (kg N/ha)(kg N/ha)(kg N/ha)
UT control0.35216.428.344.8
30kg N/ha AN0.36516.236.752.9
C active0.36917.332.449.8
30 kg N/Ha + C active0.53125.433.959.4
F pr.0.0530.0490.7020.553
SED (8 df)0.05422.7495.778.33
LSD (5%)0.12496.34013.2919.20

(Extracted from, Efficacy of C active and DH Delta in oilseed rape)

TreatmentAutumnSpringYield (t/Ha at 91% DM)
1UT control120Kg/N2.69
2UT control240Kg/N2.93
330 AN120Kg/N2.45
430 AN240Kg/N3.04
5C active120Kg/N & C active3.03
6C active240Kg/N & C active2.97
730 AN & C active120Kg/N & C active2.93
830 AN & C active240Kg/N & C active3.33
F pr0.375
SED (18 df)0.318
LSD (5%)0.668


The experiment experienced an unusually cold and prolonged winter, resulting in a smaller and more backward than usual crop throughout winter and spring.

The increase in crop biomass and N content at end of winter due to application of C-active Microbial Technology suggests that C-active Microbial Technology is effective in increasing availability or uptake of autumn applied ammonium nitrate in oil seed rape.

There was no significant effect of treatment on yield, but there was a trend for C-active Microbial Technology to increase yield for every combination of autumn and spring ammonium nitrate rate, by an average of 0.26 t/Ha.