The price is based on the US Hay and Straw pricing survey listed below and the average weight of different sizes of bales.
The Math / Science
Straw is the dry stalks of grain plant like wheat, barley and oats. It has a low nutritional value, but is commonly used in animal bedding, and as ground cover for planting seed (e.g. grass seed).
There are four common sizes of bales:
2 string square bales: 14"x18"x"36" These weigh between 40lbs and 60 lbs. (average 50lb)
3 wire square bales: 16"x22"x44" These weigh between 100lbs and 120 lbs. (average 110lb)
Large square bales: 3' x 4' x8' These weigh between 1,200lbs and a 2,000 lbs. (average 1,600lb)
Round bales: 48" wide and 60" in diameter These weigh between 600 and 1,200lbs (average 900lb)
The most current US Hay and Straw Price Survey information data is as follows:
Mowing Calculator:Estimates the distance walked, area covered, calories burned mowing and time required to mow an area of grass based on mower cutting deck width, speed and whether its a push mower or riding mower.
Calories Burned Mowing Grass: Estimates the calories burned mowing (push or riding) based on person's weight and time spent mowing grass.
Lawn Spreader Calculator: Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) are needed for a lawn based on the manufacturer recommended area of coverage per bag and the area of the lawn.
Lawn Spreader Triangle: Computes the number of bags of lawn treatment needed for a triangular lawn based on the manufacturer recommended area of coverage per bag and the length of the three sides of the lawn.
Lawn Spreader Rectangle: Computes the number of bags of lawn treatment needed for a rectangular lawn based on the manufacturer recommended area of coverage per bag and the length and width of the lawn.
Lawn Spreader 4 Sided (non-Square): Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) needed for a four sided lawn based on the manufacturer recommended area of coverage per bag and the length of the four sides and diagonal of the lawn.
Lawn Spreader 5 Sided:: Computes the number of bags of lawn treatment (grass seed, weed killer, lawn fertilizer) needed for a five sided lawn based on the manufacturer recommended area of coverage per bag and the length of the five sides and two diagonals of the lawn.
Grass Seed Calculations use SPREADER calculators above with the grass seed specifications from the manufactures.
New Sod Calculator: Computes the number of sod pieces needed for an area based on the size of the pieces of sod.
New Sod Triangle: Computes the number of pieces of sod needed to cover a triangular shaped area such as a yard or field.
New Sod Rectangle: Computes the number of pieces of sod needed to cover a rectangular shaped area such as a yard or field.
New Sod 4 Sided: Computes the number of pieces of sod needed to cover a four sided (not squared) shaped area such as a yard or field.
New Sod 5 Sided: Computes the number of pieces of sod needed to cover a five sided shaped lawn area such as a yard or field.
New Sod Circle: Computes the number of sod pieces required to cover the given diameter of a circle.
New Sod Oval: Computes the number of sod pieces required to cover an oval. It also provides the oval area and perimeter.
Straw Cover Area Calculator: Computes the number of regular square-bales of straw needed to cover an area such as a field or garden for new grass seed. The common bales are 2 string square bales of 14"x18"x"36" inches weighing between 40lbs and 60 lbs.
Bales of Straw over Rectangle: compute the number of regular square-bales of straw needed to cover new seed on a rectangle area (length by width). .