The purpose of a short field takeoff is to get the airplane off the ground and high enough to clear a 50' obstacle in the shortest distance required.
Short field Take-off preflight lessons - studyflight
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Technique: Soft-Field Landing - AOPA
Private Pilot Ground School — Foothill Flight Center
New Garden Flight School, Inc.
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Going Soft - Aviation Safety
Code 1 Aviation L-39 Flight Training
Maximum performance takeoff procedure for safe obstacle clearance