Possible Clues:

• Makes use of hybrid trees - unspecified number
• One makes the effort to get about ten trees
• Tries hard for specialists dismissing pressure
• Makes the effort to cut up about ten trees
• ___ oneself (makes an effort)
• Brings something to bear
• Makes effort to uproot large plant receiving variable shade at first
• Puts forward, as effort
• Puts to use, as influence
• Makes use of specialists disregarding pressure