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For thousands of years in the Northern climates mankind had to slaughter a large proportion of their livestock due to a shortage of winter fodder.

What prevented mankind from using silage/haylage until the 19th Century?

Was it just that no-one had the idea until the 19th Century?

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    A guess is that there just wasn't that much surplus of food, space and labour to actually store it. Don't forget that slaughtered livestock became food.
    – user31561
    Sep 21 '19 at 19:59
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    Welcome to History:SE. What has your research shown you so far? Where have you already searched? What did you find? Please help us to help you. You might find it helpful to review the site tour and Help Centre and, in particular, How to Ask. Sep 21 '19 at 20:27
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    This is a good question. +1 Has enough quality to be in History SE.(Even though the OP might be wrong.)
    – user12387
    Sep 22 '19 at 1:14
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    I think that perhaps you have a misconception here. It was not so much that pre-mechanization farmers couldn't store feed for their animals, as it was that the storage was labor intensive. In the other seasons, livestock basically feeds itself. To feed livestock through the winter, humans have to do much of the work of cutting, transporting, and storing food for it. So you'd only store food for draft animals & breeding stock.
    – jamesqf
    Sep 22 '19 at 4:08
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    The livestock wasn't killed in winter because of the lack of crops to feed them. The livestock was killed in winter to feed the people, who had little else to eat. Also, meat can much easier be preserved in cold weather, therefore butchering large animals (without having half of it spoiled) was much easier at home.
    – Greg
    Feb 8 at 21:49
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Judging by History of Silage by Wilkinson et al (2003), the premise behind the question is somewhat inaccurate.

Silage making is probably more than 3000 yr old. The ancient Egyptians and Greeks stored grain and whole forage crops in silos. Reviews of the history of silage refer to the mural in the Naples Museum, which shows whole-crop cereals being harvested and loaded into a small stone-built silo (Shukking, 1976; Woolford, 1984). Kirstein (1963) mentioned that silos were found in the ruins of Carthage, indicating that forage was ensiled there at around 1200 Be. Cato (cited by Shukking, 1976) noted that the Teutons in the first century stored green fodder in pits in the ground and then covered the pits with dung.

Little is known about silage making between about AD 100 and the eighteenth century, although it is likely that ensiling of forage crops continued to be practiced on a small scale throughout this period. According to Shukking (1976), grass was ensiled in Italy in the thirteenth century, and ensiling was practiced in the northern Alps, Sweden, and the Baltic region early in the eighteenth century. By the middle of the nineteenth century, interest in the ensiling of grass, sugarbeet tops (Beta vul- garis L.), and other crops had spread beyond the Baltic and Germany to most other European countries.

There's a small caveat here, which is that the authors of the article seem to file just about anything that's in a silo as silage. By contrast, I'm assuming you're meaning the sauerkraut version of hay that is used to feed livestock when they can't graze outdoors.

I've only skimmed the couple of pages that followed, but if I'm not mistaking this captures why it caught the interest of late 19th century farmers:

The initial enthusiasm for silage in the UK was reflected in the encouragement for the adoption of the technology from government, agricultural societies, and leading landowners, who recognized that the main advantage of silage was that it was less susceptible to total failure than either hay or root crops.

Put another way, before that they'd simply use plain hay, with all of its associated problems -- of which there are, apparently, many. (I'm no specialist by any stretch, so I'll direct you to the paper for the details.)

The paper doesn't say why it only spread like wildfire almost overnight in the late 19th (which it basically did) or why it did only then. One might speculate that hitherto benefits of a procedure known in the Baltic and Germany spread slowly in that area until, suddenly, the railroad came along and then it spread it far and wide. But that's just speculation.

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    The paper Silage in Britain, I880-I990: also discusses the timescale of developments on the continent, both in the South of Europe (Italy) in the medieval period and the later adoption in the northern parts. Sep 21 '19 at 21:36
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    I'm not an expert either, but my grandfather raised cattle (and kept a few horses), and had a barn full of hay for the winter. So whatever the "problems" with using hay are, they weren't bad enough to impair its use for this purpose into the modern era. He also raised soybeans, but didn't have a silo himself. I'm guessing it was sold as it was harvested.
    – T.E.D.
    Sep 21 '19 at 23:18
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    @T.E.D.: To me the real wtf in this question was that there's a thing that might be best described as pickled hay for the sake of keeping the stuff fresh over the winter. :D I had no idea, in spite of having been surrounded by cows in my childhood. And that might speak mountains about how little we or people back then paid attention to what feed cattle was eating day in day out. Sep 21 '19 at 23:24
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    @DenisdeBernardy This link is useful and pretty much tallies with my personal experience. One thing it doesn't seem to mention is that making small quantities of silage is tricky, and there would be a fairly high percentage of loss. As farms grew in size, silage became more viable. Hay is not actually difficult to make and store. You just need to make sure it is really dried in the field (and kept dry in storage), and have cats handy to deal with rats. Sep 22 '19 at 0:15
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    @LarsBosteen - I don't remember cats in the hay barn. To hear Grandpa Bus tell it, he had rattlesnakes for that purpose.
    – T.E.D.
    Sep 22 '19 at 20:20
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TL,DR: Maybe proper ensilaging is only feasible with some degree of mechanisation

Ensilaging crops (whole crop silage is actually pretty common as fodder) or grass is somewhat involved: You need to chop the plant matter down to a few cm, spread in layers < 30 cm and the press is to avoid air pockets. Air pockets mean mold. During the actual ensilaging (the fermentation), a lot of excess water with a high acid content is set free and needs to be kept somehwere. When the silage is fed, there's a certain minimum amount per day - i think the silo face (the sruface you feed from) should advance a meter per day at least because air will enter the silage stack, again leading to mold. In modern aplications the silo is usually covered by a foil, but that is not strictly neccessary (no foil means the top layer spoils).

A silo can be as simple as a blacktop area, more typically it's blacktop with sturdy concrete walls (with some protection) an three sides and a drainage system. However the structure has to handle the weight of the silage and the vehicles, as well as the agressive leachate - I've once met the operator of a biogas plant, his silo was in a limestone area and he had to ecavate the ground 2 o 3 m deep and haul in granite to ensure a lasting foundation (maybe the structural engineer and geotechnician where too cautios).

The point of the matter is that ensilaging has an economy of scale aspect and also requires some mechanization. I don't know for sure, but I would suspect that some form of harvester is required to do the chopping. The first harvester was invented in the 1830ties, with large comine havesters becoming common in the late 19th century.

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