SEARCH RESULTS 40 hits

The workhorse of farm measurement: field areas, yard areas, floor areas and the size of a sheet of plywood. Multiply the two sides, then convert.

More accurate earthwork volumes than end-area averaging, especially on long cuttings.

Bending strip, curved edging and the length of a curved wall.

For wedges, gussets, triangular yard patches, roof end bays and the spread of a spray boom on a slope.

The first number for any insulation job. Measure every wall and subtract the openings, and buy 10% extra for the cutting.

Measure the wall, not the tin. Two coats on new plaster need a primer first. See Painting And Prep.

Used for round tanks, silage pits, feed bins, pipe ends and round bales. Measure the diameter, halve it for the radius.

For sizing a solar array for the electric fence, the lights or a small freezer. Multiply the panel area by the irradiance you can count on, not the best case.

Paint, coating and insulation on spherical or domed tanks.

A field with one square end, a yard that narrows, the cross section of a ditch bank, a hipped roof panel.

Diamond-shaped panels, paving patterns and braces. Multiply the diagonals and halve.

Oval beds, elliptical tank ends and oval pipe openings.

Sloping panels, lean-to roofs and fields with parallel sides. Use perpendicular height, not the sloping side.

Setting out a curved gate, an arch or a circular saw cut.

The shoelace method for an irregular field boundary from surveyed coordinates.

Area of an irregular field or a pond from equally spaced offsets.

Bed planning. Work out how many plants you want, divide the bed area by the number, and that is the space each one gets.

Roofs, hoppers and conical covers. Slant height is the distance up the slope.

Pie-shaped concrete, a curved header bank, or part of a round tank lid.

Paint and insulation for tanks, silos and drums, including both ends.

Tapered tanks, silage pits, hoppers and the volume of a truncated cone.

For ordering felt, tiles, battens and underlay. Always order the underlay and never skimp on it.

When you can measure the three sides but not the height. Useful for odd yard patches.

Odd-shaped plots and roof panels where the height is awkward to measure.

Hexagonal pens, octagonal silos and regular paving. For a hexagon the multiplier is 2.598.

Average daily milk yield, average egg weight, average tractor hours a week, average weight at weaning.

Work out the fill for the area you are about to spray, then measure the product with a proper jug. Over-application is expensive, illegal and dangerous.

Work out the total area in square metres, then divide by the area each plant needs (row spacing x in-row spacing). This tells you how many plants to order for a plot or field.

The only way to compare two crops, or two fields, fairly. Divide the whole year's cost by the area, not just the variable bits.

Counting ordered arrangements: jobs in a sequence, routes, rotations.

They are the reverse of powers. They are how you find a compound interest time, a half-life, a pH, a decibels level or a Richter magnitude.

Counting arrangements, combinations and probability. 0! is defined as 1.

The sand bed is what makes the blocks sit flat. A slabbed area that wobbles has not enough compacted sand under it.

Old books are in acres, new ones in hectares, and field maps in acres. Learn both. A hectare is about 2.5 acres, which is close enough for a rough job but not for a rent calculation.

A suspended timber floor over a cold ventilated void loses a lot of heat. See Insulating A Workshop.

Before the trucks arrive, work out how much hard core or soil you need. The average of the high and low spots is the honest way to do it.

The jack, the brake press, the loader bucket and the post hole rammers. A 10 cm piston moved with 100 N will lift 1,000 kg on a 1 m piston.

Order 5% extra. A half block per row is needed at every corner and opening, and people always run out.

Convert your target plants per square metre into kg per hectare (check the seed bag or the seed-rate table), then multiply by the area in hectares. This gives total kilograms of seed to buy. See also the Seed Saving depot for saving your own seed.

When one quantity doubles, the other doubles: seed to area, feed to animals, paint to wall.