The voyagers who came from Hawaiki to Aotearoa New Zealand brought food plants with them, such as kūmarakūmara sweet potatoes, huehue gourds, taro, and yams, as well as the rituals and tools they used for cultivation.
Each village was surrounded by gardens, and everyone was involved in cultivation. Homage was paid to the god of cultivated food, Rongomatāne, to ensure good crops. There was little idleness. Chiefs and their families set the example of labour, which was followed by all.
The kō is likened to the hoe. It is the best-known and was the most widely used of all Māori agricultural tools. Mainly a soil-loosening tool, it had various shapes and lengths, and was made from a variety of woods, depending on the nature of the soil and the requirements of the user.
The kō was used with the teka (foot tread) as a spade and without the teka to loosen earth in post holes. Some kō were elaborately carved for ceremonial purposes and used by tohunga (experts) to conduct the various rituals related to planting.
Timo, timotimo, or tima were used as grubbers for loosening soil. They were often made from a forked branch, with a flattened blade and a round handle. Some timo were straight, but with the forked-branch variety, their peculiarity lies in the length of the blade, being the same or longer, than the handle.
The timo could be used effectively in a squatting position, and loosened soil too hard to be worked by a broad-bladed tool.
The name kāheru applies to several forms of wooden spades and light cultivating tools known as ketu, wauwau, and pinaki. There are three basic forms of kāheru: the spade-like form with a short blade, a long-bladed form resembling the kō, and a triangular blade form.
Kāheru were used not for heavy work such as breaking up soil or heavy digging but for lighter cultivation work, such as loosening soil, weeding, and the various tasks associated with ngaki (cultivation operations). Kāheru were made from a variety of woods, including maire, mānuka, mataī, and akeake, and sometimes bone or stone.
The Māori name for the constellation Hyades is Mata-kāheru, as this set of stars resembles the spade of a kāheru.
Kāheru, North Island, maker unknown. Te Papa (ME012104)