Probably the right bull, there could be at least a 60 day window even if they were synchronized, which it sounds like they were. If MGA was used to prevent bulling prior to AI or before turning out with the bull of choice and prostglandin injections were started immediately then it is not uncommon for heifers to breed immediately, mature cows are less likely to breed before 18-21 days after suppression.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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