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Download: [http://intothefield.nl/wp-content/uploads/2016/05/Module-4-3rd-edition-2016-08.pdf Module 4: Fertiliser Application]

===Goal===
* Provide oil palms with sufficient boron to produce optimum yields;
* Limit the loss of boron to the environment.

===Standard===
Boron fertiliser is applied according to the 4R principle: right type, right amount, right place, right time.

===Timing===
Not during very wet periods.

===Frequency===
Once per year.

===Labour time required===
2—4 hours per hectare.

===Equipment and materials===
* Bucket, bag or wheelbarrow
* Kitchen scales
* Black marker pen
* Cup or small bowl
* Fertiliser

===Dosage===
See: [[Sustainable Oil Palm Farming / Fertiliser recommendations |Table 4; Table 5; Table 6; Table 7]].

===Who===
Farmers and their families or hired labourers.

===How===
Boron fertiliser is applied in small quantities and is toxic when applied in too large amounts.

Apply boron fertiliser by following these steps:
{| style="border: 1px solid #72CDFF" cellpadding="5" cellspacing="0"
|width="15%" valign="top"|'''Step 1.'''
|Before application, remove all weeds from the weeded circle.
|-
|width="15%" valign="top" style="background:#f0f8ff;" |'''Step 2.'''
|style="background:#f0f8ff;" |Weigh the amount to be applied in a bowl or cup, using kitchen scales.
|-
|width="15%" valign="top"|'''Step 3.'''
|Mark the bowl / cup at the right amount using a black marker pen.
|-
|width="15%" valign="top" style="background:#f0f8ff;" |'''Step 4.'''
|style="background:#f0f8ff;" |Break any clumps into small pieces before application of fertiliser.
|-
|width="15%" valign="top" |'''Step 5.'''
|Apply boron fertiliser evenly in the weeded circle for palms of all ages.
|}

'''Note''': Boron fertiliser is mildly toxic, so it is best not to eat, drink or smoke during application and to wash hands immediately after application.

===Data recording===
Every fertiliser application should be recorded in a logbook as shown in the example below.
{|border="1" cellpadding="5" cellspacing="0"
|rowspan="2" |'''Date'''
|rowspan="2" |'''Time'''
|rowspan="2" |'''Location'''
|rowspan="2" |'''Activity'''
|rowspan="2" |'''Input type'''
|rowspan="2" |'''Input amount'''
|rowspan="2" |'''Input costs'''
|colspan="2" |'''Labour input'''
|rowspan="2" |'''Labour costs'''
|-
|'''People'''
|'''Hours'''
|-
|16/01/13
|<!--empty-->
|Field 3
|Fertiliser: B
|Borax
|15 kg
|200000
|1
|4
|40000
|}

===Acknowledgements===
The material from ''Applying boron (B)'' is sourced from Smallholder Oil Palm Handbook and put together by Lotte Suzanne Woittiez ([http://www.wageningenur.nl/en/wageningen-university.htm Wageningen Universit]) and Haryono Sadikin, Sri Turhina, Hidayat Dani, Tri Purba Dukan, and Hans Smit ([http://www.snv.org/ SNV]) in August 2016. See [http://intothefield.nl/wp-content/uploads/2016/05/Module-4-3rd-edition-2016-08.pdf Module 4: Fertiliser Application] for more information.
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