Find the Third
Paddock 1/50 pts
What the words mean
DM (dry matter)
What's left of feed once all the water is taken out. Cows are fed on DM, because the water has no feed value. Fresh grass is only about 15 to 20% DM.
kg DM
Kilograms of dry matter. A milking cow eats about 17 to 18 kg DM a day.
Cover (kg DM/ha)
How much grass is in a paddock, measured as kg of dry matter per hectare. Measured with a plate meter or judged by eye.
Residual
The grass left behind after grazing. Leave about 1,500 kg DM/ha so it grows back fast. Graze lower and regrowth slows. Leave more and grass gets wasted and goes stalky.
Available feed
Cover minus residual: the grass the cows can actually eat. A 2,900 cover grazed to 1,500 gives 1,400 kg DM/ha to eat.
Break
The part of a paddock the cows are given for one grazing, fenced off with a temporary tape.
Reel and waratah
A reel holds the electric tape. Waratahs are the steel standards you run it between.
Back-grazing
Leaving the last break open so cows can go back and tidy up what they left.
Fence posts
The squares along every fence line are posts, 10 m apart. Count them to pace out a break: on a 200 m fence, a third is about 67 m, so a bit under 7 posts. Every farm's spacing is different, so learn your own.
Hectare (ha)
10,000 m², about the size of a rugby field with its in-goal areas. 0.5 ha is half that.
Supplement
Feed brought in to top up grass: silage, hay, PKE or meal.
Silage
Grass or maize cut and stored wet, sealed so it ferments and keeps. Heavy because it's mostly water: often only 30 to 40% DM.
PKE (palm kernel)
A dry, bought-in feed made from palm kernels. About 90% DM, fed on a pad or in the shed.
Wastage
Feed the cows trample, soil or leave. Much higher when fed out in a wet paddock than on a feed pad.
Feed gap
How much more the cows need than the grass can give them.
Break by area

Home paddock

Paddock

Tap twice to put in two waratahs. Drag them to move the reel. The break is the side with the gate.