title: Plant availability of boron adsorbed or occulted on goethite to rape (Brassica napus L.) seedling

authors: Ren, Liying

subjects: boron-doped goethite

abstract: The purpose of the study was to determine plant availability of boron (B) and relaxation of soil acid to rape seedling exhibited by B-doped goethite in acidic soil. For this purpose, two kinds of B-doped goethite were synthesized: one was goethite with adsorbed B prepared by reacting goethite with borax solution, and the other was goethite with occluded B by synthesizing goethite in the presence of boric acid. The reaction process in soil-like natural minerals of the B-doped goethite was simulated in a rhizobox culture system. Results showed that the B-doped goethite can provide available B for rape growth. Its addition on acidic soil can alleviate soil acidification by increasing soil pH and decreasing soil exchangeable acid. The observation that nutrient uptake was improved supports the view that the B-doped goethite improved soil quality, as also proved by the increase of root morphology and dry weight.

text: Plant availability of boron adsorbed or occulted on goethite to rape (Brassica napus L.) seedling The purpose of the study was to determine plant availability of boron (B) and relaxation of soil acid to rape seedling exhibited by B-doped goethite in acidic soil. For this purpose, two kinds of B-doped goethite were synthesized: one was goethite with adsorbed B prepared by reacting goethite with borax solution, and the other was goethite with occluded B by synthesizing goethite in the presence of boric acid. The reaction process in soil-like natural minerals of the B-doped goethite was simulated in a rhizobox culture system. Results showed that the B-doped goethite can provide available B for rape growth. Its addition on acidic soil can alleviate soil acidification by increasing soil pH and decreasing soil exchangeable acid. The observation that nutrient uptake was improved supports the view that the B-doped goethite improved soil quality, as also proved by the increase of root morphology and dry weight.

year: 2010

title: Temporal and spatial variations in phytoplankton productivity in surface waters of a warm-temperate, monomictic lake in New Zealand

authors: von Westernhagen, Nina

subjects: Eutrophication

abstract: Surface phytoplankton productivity measurements were carried out in morphologically complex Lake Rotoiti with the objective of defining variations between sites and seasons, and the dominant environmental drivers of these variations. Measurements were carried out monthly at two depths at each of three morphologically diverse stations for 1 year throughout the lake. Productivity at the surface of the shallow embayment was significantly higher in most months of the year compared with the surface of the other two stations but there were no significant differences from September to December 2004. There were no relationships between measured environmental variables and primary productivity or specific production. Inorganic nutrient concentrations at the surface of the shallow station were low throughout the whole year but at the other two stations they showed a typical pattern for monomictic lakes of higher levels during winter mixing and declining concentrations during thermal stratification. The high variability between sites found in this study indicates that it is important to account for local differences in productivity in morphologically diverse lakes, and that whole lake productivity estimates may vary greatly depending on the location and depth of productivity measurements.

text: Temporal and spatial variations in phytoplankton productivity in surface waters of a warm-temperate, monomictic lake in New Zealand Surface phytoplankton productivity measurements were carried out in morphologically complex Lake Rotoiti with the objective of defining variations between sites and seasons, and the dominant environmental drivers of these variations. Measurements were carried out monthly at two depths at each of three morphologically diverse stations for 1 year throughout the lake. Productivity at the surface of the shallow embayment was significantly higher in most months of the year compared with the surface of the other two stations but there were no significant differences from September to December 2004. There were no relationships between measured environmental variables and primary productivity or specific production. Inorganic nutrient concentrations at the surface of the shallow station were low throughout the whole year but at the other two stations they showed a typical pattern for monomictic lakes of higher levels during winter mixing and declining concentrations during thermal stratification. The high variability between sites found in this study indicates that it is important to account for local differences in productivity in morphologically diverse lakes, and that whole lake productivity estimates may vary greatly depending on the location and depth of productivity measurements.

year: 2010

title: John William Richard Guilding

authors: Hart, Philip

abstract: Born in Auckland in 1842, by his late teenage years John William Richard Guilding was trading with Maori in the Piako district. Protected by a rangatira, he established a store at Kerepehi, but despite being known to be ‘friendly’ with Maori he was driven off after the start of the Waikato War. In 1864, again with the approval of a rangatira, he erected a store on the site of the future township of Thames. Although he claimed to have found signs of gold there, he was not the prospector who produced the samples that led to the opening of the goldfield. In 1869 he was appointed a licensed interpreter, in which role he assisted both the Crown and private individuals to acquire Maori land. Some of these transactions created controversy, and he was accused of tricking Maori. In 1875 his attempt to use his position as James Mackay’s interpreter to acquire a lease of land at Tairua for his own financial gain provoked much criticism, and his ‘irregular practices’ led to his dismissal as a licensed interpreter in 1883. He would continue to act for individuals as both an interpreter and a land agent in Ohinemuri and Te Aroha in subsequent years.
Guilding’s close links with Maori were in part explained by his private life. Having married a ‘half-caste’ who later left him for another man, he had three more ‘marriages’ and several more children, who were brought up in Pakeha ways. Financially, he always struggled, filing as bankrupt twice and dying in straightened circumstances. At Te Aroha he held several minor official positions, sometimes being criticized for his performance. Active in local politics, he was generally unpopular and was never elected to the positions he sought. Throughout his life his reputation amongst a sizeable number of his contemporaries was poor.

text: John William Richard Guilding Born in Auckland in 1842, by his late teenage years John William Richard Guilding was trading with Maori in the Piako district. Protected by a rangatira, he established a store at Kerepehi, but despite being known to be ‘friendly’ with Maori he was driven off after the start of the Waikato War. In 1864, again with the approval of a rangatira, he erected a store on the site of the future township of Thames. Although he claimed to have found signs of gold there, he was not the prospector who produced the samples that led to the opening of the goldfield. In 1869 he was appointed a licensed interpreter, in which role he assisted both the Crown and private individuals to acquire Maori land. Some of these transactions created controversy, and he was accused of tricking Maori. In 1875 his attempt to use his position as James Mackay’s interpreter to acquire a lease of land at Tairua for his own financial gain provoked much criticism, and his ‘irregular practices’ led to his dismissal as a licensed interpreter in 1883. He would continue to act for individuals as both an interpreter and a land agent in Ohinemuri and Te Aroha in subsequent years.
Guilding’s close links with Maori were in part explained by his private life. Having married a ‘half-caste’ who later left him for another man, he had three more ‘marriages’ and several more children, who were brought up in Pakeha ways. Financially, he always struggled, filing as bankrupt twice and dying in straightened circumstances. At Te Aroha he held several minor official positions, sometimes being criticized for his performance. Active in local politics, he was generally unpopular and was never elected to the positions he sought. Throughout his life his reputation amongst a sizeable number of his contemporaries was poor.

year: 2016