Peter smith business manager at volac says "Second cut grass听is听inherently drier so a 24 hour wilt听is听often听excessive."
Taking account of field conditions听ahead of silage making听is vital in order to maximise quality.
Second cut presents听different听conditions to first cut, as the grass is more fibrous and lignified and days are longer, meaning grass will dry more quickly. Peter Smith business manager of Volac suggests farmers need to bear听this听in mind when deciding听on wilt times:
"Second cut grass听is听inherently drier so a 24 hour wilt听is听often听excessive; unless the weather is wet it should be possible to pick up听grass听on the same day. If using a contractor, they will be able to provide feedback on their experience of听optimum听wilting times听this season.
"If filling on top of first cut, always听place a layer of听fresh grass听before travelling on the silage听as otherwise carbon dioxide will be displaced听from the silage already in the clamp,听and oxygen will move in.听
"Clamps should be filled in layers no deeper than 150mm and each layer rolled before adding another. Once the last layer has been rolled, it is important to place the sheet on as soon as possible and fully seal the clamp to prevent any oxygen entering," Mr Smith advises.
Check
Eleazar McKeever Sales manager from Krone urges farmers to take time to check mowers, tedders and rakes are correctly adjusted to conditions on the day.
"It听is vital to select the right speed on the mower conditioner. For heavy crops, the higher speed of 900 rpm is appropriate, whereas for lighter crops, the grass will need less conditioning".
"There are seven settings for the distance between the baffle plate and top of the mower. For drier crops, choose a higher setting to maintain a greater distance听for听less conditioning听and for wetter crops, a lower setting will result in more bruising of the grass, leading to a quicker wilt".听
"Avoid closing听it up too much as this can lead to excessive power consumption and increased fuel usage". 听
"Setting听the correct top link length to set the pitch of the blades will determine the length of stubble left behind the crop. If mowing when the ground is soft, leaving a longer stubble length is desirable to prevent contamination," Mr McKeever explains.
Mr McKeever says tines听on the tedder听should be set with around 20mm tine tip to stubble, to avoid听them听scraping the ground:
"The pitch of each tine on Krone machines can be adjusted individually by altering the angle of the wheel between 13o听and 19o. For wet, heavy crops or when making hay, a low setting will spread the grass out as far as possible; for lighter crops or for repeat tedding of a hay crop, a higher setting is recommended".
"The PTO speed for a tedder should be no faster than 450 rpm and ideally between 350 and 400 rpm with the higher revs reserved for heavier crops."听
Options
If听first-cut听yields are disappointing or quality is below expectations, this often indicates weed grasses are out-competing sown species听and a re-seed might be the best option, John Spence forage crops product manager of Limagrain UK says.
"After the 2022 drought听followed by听a听late听spring, many farmers need more grass this season. Ploughing a field up now will mean taking a hit to production when grass growth is at its peak".听
"A preferred option could be to boost production from existing swards by over-sowing with more productive, fast growing ryegrasses and introducing clover species".听
"Alternatively, some farmers may wish to hold off re-seeding until autumn, or sow a break crop such as stubble turnips or kale to provide an autumn winter forage before re-seeding with grass".
听
Spring听or autumn re-seed?
|
Advantages |
|
|
Spring |
Autumn |
|
Wider听window of good conditions for the establishment |
Minimal impact on yield loss |
|
No heading in first season |
Seedbed has time to settle over the winter |
|
Better opportunity to out-compete weeds |
Gives the option of growing听an intervening听cover or catch crop to help control pests and diseases |
听
|
Disadvantages |
|
|
Spring |
Autumn |
|
Loss of听peak听grass听growth |
Weed competition can be significant with late reseeds |
|
Shorter window for soil to settle before carrying stock |
Narrower window of听suitable听establishment conditions |
Campaign for Better Silage
Campaign for Better Silage is a new 2023 initiative brought to you by Krone, Sinclair McGill, Volac and Yara, offering advice to dairy farmers on how to navigate the inevitable grassland challenges 2023 will bring, as well as offering best practice guidance to ensure maximum production on every farm.
The exceptionally dry weather in 2022 has left many grassland farmers with a shortfall of silage and 2023 looks to set to be a particularly challenging season for many.
That said, some farmers did manage the 2022 season better than others and employed grassland techniques which have seen them finish the year with adequate stocks.
The continuing economic crisis, coupled with unquestionable changing weather patterns, means that identifying and sharing the techniques which produce best results is going to be critical for the industry to embrace moving forward.
Watch the launch debate LAMMA 2023, below...

















