Relive the excitement of the Patriots’ path to their fourth Super Bowl Championship with “Pumped”, a special commemorative book from The Boston Globe. Order now.

Graphic: Replacing Fenway Park’s sod for 2014

To prepare the field for this season, the Red Sox grounds crew had to dig up the sacred sod -- a planned renovation, though not an annual one -- where the Sox celebrated a world championship at home for the first time since 1918. A look at the process:

Old sod

In February, the frozen ground is thawed using hoses (shown above), heating units, blankets, and the rain tarp to trap heat. The old grass is removed and used for compost.

Sand

Sand, not dirt, lies under the sod at Fenway Park. Early in March, the sand is tilled, laser-leveled to grade, hand-watered, and laser-leveled again before a new layer of sod is placed.

New sod

Each roll of Kentucky bluegrass has a 1.25-inch thick root zone and is four feet wide. Synthetic and organic fertilizers, designed for cool temperatures, are underneath the sod.

Finished sod

The roots take hold through pores in the sand once the soil warms. The grass is mowed daily when the Red Sox are at home, once every three days when they are on the road.

Winter maintenance

To make the ground thaw quicker, the grounds crew has to be strategic in winter. Snow is plowed toward the left-field wall to make it melt faster, since the Green Monster absorbs heat.

Fenway's 'microclimates'

Warmer

Area in front of Green Monster.

Colder

Area shaded by upper deck

Amount of sod

Fenway uses approximately 84,000 square feet of sod. Based on an average lot size of 5,000 square feet, it is enough to sod 16.8 homes.

Luke Knox, Chiqui Esteban/Globe Staff

State approves plan for Salem’s Bentley School to become a charter

Salem’s Bentley School, one of the lowest achieving public schools in the state, will become a charter school next fall.

Last week, the Board of Elementary and Secondary Education awarded two new charters, choosing Bentley, a K-5 elementary, and the UP Academy Charter School of Springfield. Both will be Horace Mann charter schools, funded by the local school districts but run by an independent board.

The Salem school will be called the Bentley Academy Charter School.

“The in-district charter gives us an opportunity to focus — and I think in a stronger way — on some of the needs of the students in that school,” said Salem Mayor Kim Driscoll, who also chairs the School Committee and supported Bentley’s shift to a charter.

For the last four years, Bentley has struggled with academic achievement.

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