Table 1.
Farm operations in the Frick trial in 2013 and 2014.
| Date | Farm operation | Treatments | Specifications |
|---|---|---|---|
| 31th Aug 2011 | seedbed preparation and seeding of grass-clover | all | grass-clover mixture OH-330, 33 kg ha−1 |
| 2013 | |||
| 19th March | manure compost application | only MC | 55 kg Nt ha−1, 20.3% dm, C/N 11.3 |
| 23th May | 1st cut | all | |
| 4th June | 1st slurry application | all | MC: 25 kg Nt ha−1, SL: 50 kg Nt ha−1, 3.5% dm, C/N 10.2 |
| 4th July | 2nd cut | all | |
| 18th July | 2nd slurry application | all | MC: 22 kg Nt ha−1, SL: 44 kg Nt ha−1, 2.9% dm, C/N 9.1 |
| 27th Aug | 3rd cut | all | |
| 23th Sep | reduced ley termination | only RT | skim plough, 0.07–0.1 m |
| 2nd Oct | reduced ley termination | only RT | chisel plough, 0.1 m |
| 7th Oct | 4th cut | only CT | |
| 9th Oct | ley termination by ploughing | only CT | mouldboard plough, 0.15–0.18 m |
| 20th Oct | seedbed preparation and seeding of winter wheat | all | rotary tiller, 0.05 m winter wheat cv. ‘Wiwa’, 250 kg ha−1 |
| 2014 | |||
| 11th March | manure compost application | only MC | 62 kg Nt ha−1, 25.8% dm, C/N 11.7 |
| 19th March | 1st slurry application | all | MC: 27 kg Nt ha−1, SL: 55 kg Nt ha−1, 3.5% dm, C/N 9.5 |
| 9th Apr | 2nd slurry application | all | MC: 30 kg Nt ha−1, SL: 61 kg Nt ha−1, 4.6% dm, C/N 11.4 |
| 17th July | wheat harvest | all | |
| 25th Aug | seedbed preparation and seeding of a cover crop | all | rotary tiller, 0.05 m Orgamix DS mixture (Trifolium incarnatum L., Vicia villosa R., Secale cereale L.), 60 kg ha−1 |
CT – ploughing, RT – reduced tillage, SL – slurry, MC – manure compost, Nt – total nitrogen, dm – dry matter.