Dear Sir, In order to get optimum yield you have to observe 3 things
1.Do not over prune the palm fronds.You may only remove the moribunds ( dry fronds )
2.Observe that all palms receive correct fertilizer dosages according to your leave sampling advice/fertilizer recommendations.
3.Observe that harvesting is done correctly with all loose fruits collected. No removal of fronds allowed at this age during harvesting operation.
To save cost on fertilizer and to provide better humidity please initiate EFB ( empty fruit bunch application 40 tons/ha ).Hopefully you do have LCC (cover crops ) earlier planted and the oil palm weevil established to boost better yields.
To avoid competition,it is best not to do intercropping. If you have to, then go for short term commercial crop such as Tapioca.Lastly my advise to you is to go and have a look at any commercial plantations nearby your area to catch up with their best agronomic practices.
TQ.
Regards,
Kelana