title: Effect of environment and time of planting on the production and quality of yacon (Smallanthus sonchifolius) storage roots

authors: Douglas, James A.

subjects: yacon

abstract: The tuberous root yields of yacon (Smallanthus sonchifolius) were compared from field trials planted in September, October, and November at four sites (Pukekohe, Hamilton, Lincoln, Mosgiel) across New Zealand. The September plantings gave the highest yields at all sites, with the October plantings giving 17% less yield and the November plantings 61% less. The September planting at Hamilton produced the highest yield of 90 t/ha, Pukekohe 64 t/ha, Lincoln 22 t/ha, and Mosgiel 15 t/ha. Regression analysis established a strong positive relationship between dry root yield and accumulated growing degree days (GDD) below 10°C calculated for base temperatures 0, 6, and 8°C (R² = 0.87–0.88). Regression analysis R² values declined above 10°C. Dry root yields were high where heat accumulation was at least 1800 GDD8 for the growing season with c. 1 t/ha of dried roots being produced for every additional 100 GDD8 above 1200 degree days. This relationship helps to identify suitable production environments for yacon. Best root production also needs an undefined level of cool temperatures as at the warmest site crown production was favoured. Total fructo‐oligosaccharide (FOS) content of the yacon roots varied from 48.2% to 67.5%. November yacon had the lowest FOS content and conversely the highest content of non‐FOS carbohydrates.

text: Effect of environment and time of planting on the production and quality of yacon (Smallanthus sonchifolius) storage roots The tuberous root yields of yacon (Smallanthus sonchifolius) were compared from field trials planted in September, October, and November at four sites (Pukekohe, Hamilton, Lincoln, Mosgiel) across New Zealand. The September plantings gave the highest yields at all sites, with the October plantings giving 17% less yield and the November plantings 61% less. The September planting at Hamilton produced the highest yield of 90 t/ha, Pukekohe 64 t/ha, Lincoln 22 t/ha, and Mosgiel 15 t/ha. Regression analysis established a strong positive relationship between dry root yield and accumulated growing degree days (GDD) below 10°C calculated for base temperatures 0, 6, and 8°C (R² = 0.87–0.88). Regression analysis R² values declined above 10°C. Dry root yields were high where heat accumulation was at least 1800 GDD8 for the growing season with c. 1 t/ha of dried roots being produced for every additional 100 GDD8 above 1200 degree days. This relationship helps to identify suitable production environments for yacon. Best root production also needs an undefined level of cool temperatures as at the warmest site crown production was favoured. Total fructo‐oligosaccharide (FOS) content of the yacon roots varied from 48.2% to 67.5%. November yacon had the lowest FOS content and conversely the highest content of non‐FOS carbohydrates.

year: 2007

title: Australia's PSWPS: Development impacts in the first two years

authors: Gibson, John

subjects: development impacts

abstract: This research note presents an analysis of the development impacts of Australia's Pacific Seasonal Worker Pilot Scheme. We estimate the gain per participating household to be approximately A$2600, which is a 39% increase in per-capita annual income in participating households. The aggregate impact to date is small, but the experience of New Zealand's larger programme shows that seasonal worker programmes can potentially have large aggregate effects.

text: Australia's PSWPS: Development impacts in the first two years This research note presents an analysis of the development impacts of Australia's Pacific Seasonal Worker Pilot Scheme. We estimate the gain per participating household to be approximately A$2600, which is a 39% increase in per-capita annual income in participating households. The aggregate impact to date is small, but the experience of New Zealand's larger programme shows that seasonal worker programmes can potentially have large aggregate effects.

year: 2011

title: Restorative Practices in Schools: Far-Reaching Implications

authors: Drewery, Wendy

subjects: New Zealand

abstract: In 1999, the New Zealand Ministry of Education contracted a team from the University of Waikato to develop a process for conferencing in schools. The brief was to utilise restorative justice principles to develop a conferencing process for use in schools. The purpose was to test whether such an approach to wrongdoing could reduce the exponential increase of suspensions, particularly of Maori boys, who were, and still are, disproportionately represented in reported numbers of suspensions, stand-downs and exclusions.

text: Restorative Practices in Schools: Far-Reaching Implications In 1999, the New Zealand Ministry of Education contracted a team from the University of Waikato to develop a process for conferencing in schools. The brief was to utilise restorative justice principles to develop a conferencing process for use in schools. The purpose was to test whether such an approach to wrongdoing could reduce the exponential increase of suspensions, particularly of Maori boys, who were, and still are, disproportionately represented in reported numbers of suspensions, stand-downs and exclusions.

year: 2007