New Zealand Kauri 'Yakas' in the Waipoua Forest, Wekaweka, New Zealand, New Zealand

This page contains specific information about New Zealand Kauri (Agathis australis) '34454', which can be found in the Waipoua Forest in Wekaweka (North Island).

This tree is called "Yakas". See the apparent same Yakas Kauri reported at The New Zealand Tree Register and Google Street View

Please do note that measured sizes are differing, as well as precise locations. These differences should be explained, see Discussion 3547.

See reports of other large Kauri trees close to this one at The New Zealand Tree Register: Tane Mahuta (Lord of the Forest), Kauri 800 Te Matua Ngahere, Kauri 802 Toronui, Kauri 805 Trounson Big Tree, Kauri 1373 Mangatu Kauri, Kaihu Kauri, 1375.

Further large trees reported from Northland Region: McGregor Kauri, 815 Hokianga, Kauri 803 Rakaunui, Kauri 1365 Kopi Kauri, 1376 Te Tangi o te Tui, Kauri 1281 Tane Moana, Kauri 1366

The tree was first photographed and measured in 1908 by the noted botanist Leonard Cockayne, at 46 feet (14 m) in girth, 6 feet (1.8 m) above ground. Some years later, the tree was seen by Nick Yakas, a forestry worker looking for kauri gum (a copal resin from the tree) to sell. He guided others to the tree in 1966, and his name was associated with the tree since that time. The tree was damaged in a storm in 1968, with one of its main branches falling.

The official 1971 New Zealand Forestry Service girth of 12.29 m is a "centre girth" measurement (a mathematical average girth of the cylinder representing the merchantable volume of the tree, over the merchantable length of the trunk, some 12 m tall). The girth of the tree at 1.5 m above ground level is 15.25 m, measured in 2009 by Bob Van Pelt. Although the tree is easily accessible, no recent measurement has been made to avoid trampling the delicate roots of the tree and potentially spreading the infectious Phytophthora agathidicida pathogen.

Girth growth rate

The girth was measured more than once:

Year	Girth @1.3 m	Girth @1.5 m	Measurement	Girth growth rate
2009	?	15.25 m	foomanz	-
2013	12.29 m	?	Giant Trees Foundation	-

The growth rate shown in the table shows the yearly average increase in girth since the last measurement. This value only gives an indication of the growth rate, since every measurement could be done at slightly different heights and during different periods of the year. Its height is exactly 44.50 m (Nov 17, 2013, Laser with Two-point measurement (e.g. Nikon Forestry 550/Pro) - sine method, Giant Trees Foundation). This tree germinated / was planted around the year 200 ± 200, which makes it around 1824 ± 200 years old (Giant Trees Foundation, Mar 21, 2018).

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Photos

The photos are provided by foomanz.

20th of January 2009