Sustainable Oil Palm Farming / Applying magnesium (Mg)
Download: Module 4: Fertiliser Application
- Provide oil palms with sufficient magnesium to produce optimum yields;
- Limit the loss of magnesium to the environment.
Magnesium fertiliser is applied according to the 4R principle: right type, right amount, right place, right time.
- Not during very wet periods because magnesium is sensitive to leaching.
- If magnesium is applied, then urea should not be applied shortly after because this will increase leaching of nitrogen.
1—2 doses per year, depending on the total quantity of magnesium fertiliser applied 1.
Labour time required
2—4 hours per hectare.
Equipment and materials
- Bucket, bag or wheelbarrow
- Kitchen scales
- Black marker pen
- Bowl of 1.5—2 L
Farmers and their families or hired labourers.
Apply magnesium fertiliser by following these steps:
|Step 1.||Before application, remove noxious weeds are and slash ground cover to 50 cm height.|
|Step 2.||Weigh the amount to be applied in a bowl or cup, using kitchen scales.|
|Step 3.||Mark the bowl / cup at the right amount using a black marker pen.|
|Step 4.||Break up any clumps of fertiliser into small pieces before application.|
|Step 5.||Dolomite is best applied as follows:
Kieserite is best applied as follows:
If palms are on the edge of a river, road or ditch, avoid applying fertilisers on the side of the palm closest to the edge.
Every fertiliser application should be recorded in a logbook as shown in the example below.
|Date||Time||Location||Activity||Input type||Input amount||Input costs||Labour input||Labour costs|
|16/01/13||Field 3||Fertiliser: Mg||Dolomite||300 kg||300000||1||4||40000|
- K.J. Goh, R. Hardter, General Oil Palm Nutrition, (2003).
The material from Applying magnesium (Mg) is sourced from Smallholder Oil Palm Handbook and put together by Lotte Suzanne Woittiez (Wageningen Universit) and Haryono Sadikin, Sri Turhina, Hidayat Dani, Tri Purba Dukan, and Hans Smit (SNV) in August 2016. See Module 4: Fertiliser Application for more information.