Field trials on hexoestrol implantation of steers on New Zealand farms

1963 ◽  
Vol 60 (1) ◽  
pp. 87-93 ◽  
Author(s):  
G. C. Everitt ◽  
A. H. Carter
Keyword(s):  
New Zealand ◽  
Growth Rates ◽  
Hormone Treatment ◽  
Field Trials ◽  
Carcass Weight ◽  
Carcass Quality ◽  
Average Response ◽  
The North

Field trials on hexoestrol implantation were conducted in the Waikato area of the North Island of New Zealand during 1958–59, involving 260 two and three year old Aberdeen Angus steers from nine farms. Two levels of hormone implantation were studied, namely, 30 and 45 mg. The trials ranged in duration from three to five months with an average of four months.Pronounced differences were apparent between farms in the overall growth rates and carcass quality scores of the cattle.Hexoestrol implantation led to a significant increase in carcass weight, estimated at approximately 22 lb., with little evidence of real differences between farms in the average response to the hormone.Response to the higher as compared with the lower dose of hexoestrol varied markedly among the separate farms. In general, the lower dose of 30 mg. tended to yield the greater increase in carcass weight.A small, but consistent, depression of carcass quality scores was manifest under hormone treatment, with no real differences between the two dosage levels.

scholarly journals Summary of eleven long-term field trials with 'Longlife' phosphatic fertiliser

1992 ◽  
pp. 35-40
Author(s):  
S.F. Ledgard ◽  
B.S. Thorrold ◽  
A.G. Sinclair ◽  
S.S.S. Rajan ◽  
D.C. Edmeades
Keyword(s):  
New Zealand ◽  
Phosphate Rock ◽  
Field Trials ◽  
Triple Superphosphate ◽  
Single Superphosphate ◽  
The North ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock ◽  
Term Field

Longlife' phosphatic fertiliser is manufactured in New Zealand by mixing reactive phosphate rock (RPR) with single superphosphate (SSP) when the SSP is at an ex-den stage. Commercially produced Longlife (70:30 SSP:RPR) was evaluated in 6 field mowing trials in the North Island over 3 or4 years. Also, a 5050 (SSP:RPR) Longlife-type product was examined in 5 field trials throughout New Zealand over 5 or 6 years. Longlife was compared against SSP and/or triple superphosphate (TSP) in all trials, and RPR treatments were included in 7 trials. In all trials with commercially produced Longlife, the pasture response to Longlife tended to be less than that to SSP or TSP in the first 2 years and was significantly different (P 6.0 and/or rainfall ~800 mm/year). Keywords field trials, Longlife, phosphate, reactive phosphate rock, superphosphate

scholarly journals Hypovirulent Rhizoctonia spp isolates from New Zealand soils protect radish seedlings against dampingoff caused by R solani

2004 ◽  
Vol 57 ◽  
pp. 54-58 ◽  
Author(s):  
B. Sneh ◽  
E. Yamoah ◽  
A. Stewart
Keyword(s):  
New Zealand ◽  
Rhizoctonia Solani ◽  
Lolium Perenne ◽  
Growth Rates ◽  
Raphanus Sativus ◽  
Soil Samples ◽  
The North ◽  
Screening Experiment ◽  
Radish Seedlings ◽  
North And South

Of the 206 Rhizoctonia spp isolates obtained from 135 soil samples collected from different fields in the North and South Islands of New Zealand 55 were pathogenic on radish (Raphanus sativus cv Rex) seedlings Only 27 of the isolates that were strongly pathogenic on radish were also pathogenic on ryegrass (Lolium perenne) While 13 of the 92 hypovirulent isolates provided gt;50 protection to radish seedlings against dampingoff caused by Rhizoctonia solani in a screening experiment only three provided gt;50 protection in the final more detailed experiment The best protective isolates R8510 and R308 consistently protected approximately 70 of radish seedlings in at least two separate experiments There was no correlation between the growth rates of the hypovirulent Rhizoctonia spp isolates and their percentage protection of radish seedlings against dampingoff

Studies of Ptiliidae (Coleoptera) in the Spirit Collection of the Natural History Museum, London 2: New species and records from P. Hammond's visit to New Zealand in 1983–84

2018 ◽  
Vol 154 (3) ◽  
pp. 179-196
Author(s):  
Michael Darby
Keyword(s):  
New Species ◽  
New Zealand ◽  
Natural History ◽  
Natural History Museum ◽  
History Museum ◽  
The North ◽  
Three New Species ◽  
North And South

Some 2,000 Ptiliidae collected in the North and South Islands of New Zealand in 1983/1984 by Peter Hammond of the Natural History Museum, London, are determined to 34 species, four of which are new to the country. As there are very few previous records, most from the Auckland district of North Island, the Hammond collection provides much new distributional data. The three new species: Nellosana insperatus sp. n., Notoptenidium flavum sp. n., and Notoptenidium johnsoni sp. n., are described and figured; the genus Ptiliodes is moved from Acrotrichinae to Ptiliinae, and Ptenidium formicetorum Kraatz recorded as a new introduction. Information is provided to aid separation of the new species from those previously recorded.

N, P and K Fertilizers Alter Plant Growth, Essential Oil Yield and Gender of Sweet Gale (Myrica gale L)

2014 ◽  
Vol 8 (1) ◽  
pp. 9-17
Author(s):  
X. Chang ◽  
P. Martin
Keyword(s):  
Plant Growth ◽  
Field Trials ◽  
Oil Yield ◽  
Oil Composition ◽  
Myrica Gale ◽  
The North ◽  
Oil Concentration ◽  
N Treatment ◽  
And Gender ◽  
Essential Oil Yield

To investigate whether the fertilizers N, P or K individually affect plant growth, oil content and the gender of sweet gale, two trials, pot and field trials, were carried out at Orkney College UHI in Scotland. A pot trial was established with eight soils which were collected from different sweet gale trial sites in the north of Scotland. Although neither shoot yield nor oil concentration in shoots was affected by soil, there were significant differences in shoot yields as a result of fertilizer treatments (nitrogen (N), phosphorus (P), potassium (K) or none (control)). The best yield was obtained from the N treatment which was double to that of the control and P treatments. N, P or K fertilizers did not consistently affect shoot oil concentration in two seasons; however, oil yield was significantly affected, and N treatment produced two-three fold oil yield increases compared with the control or P treatment. In the N treatment, the increase in shoot yield was positively correlated with total nitrogen or nitrate nitrogen in the soil, suggesting the occurrence of a nitrogen priming effect. Data suggested that as shoot yield increased the oil concentration in shoots decreased. Neither soil nor N, P or K fertilizers had a significant effect on oil composition. Amongst fertilizer treatments, P resulted in the largest number of plants changing gender from female to male. A field N trial confirmed that nitrogen significantly enhanced the shoot yield of young plants.

scholarly journals Spatial Distribution of Lichens in Metrosideros excelsa in Northern New Zealand Urban Forests

Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 170
Author(s):  
Gladys N. Benitez ◽  
Glenn D. Aguilar ◽  
Dan Blanchon
Keyword(s):  
Spatial Distribution ◽  
Species Richness ◽  
New Zealand ◽  
Lichen Species ◽  
Positive Correlation ◽  
Breast Height ◽  
Lichen Community ◽  
The North ◽  
The City ◽  
Lichen Flora

The spatial distribution of corticolous lichens on the iconic New Zealand pōhutukawa (Metrosideros excelsa) tree was investigated from a survey of urban parks and forests across the city of Auckland in the North Island of New Zealand. Lichens were identified from ten randomly selected trees at 20 sampling sites, with 10 sites classified as coastal and another 10 as inland sites. Lichen data were correlated with distance from sea, distance from major roads, distance from native forests, mean tree DBH (diameter at breast height) and the seven-year average of measured NO2 over the area. A total of 33 lichen species were found with coastal sites harboring significantly higher average lichen species per tree as well as higher site species richness. We found mild hotspots in two sites for average lichen species per tree and another two separate sites for species richness, with all hotspots at the coast. A positive correlation between lichen species richness and DBH was found. Sites in coastal locations were more similar to each other in terms of lichen community composition than they were to adjacent inland sites and some species were only found at coastal sites. The average number of lichen species per tree was negatively correlated with distance from the coast, suggesting that the characteristic lichen flora found on pōhutukawa may be reliant on coastal microclimates. There were no correlations with distance from major roads, and a slight positive correlation between NO2 levels and average lichen species per tree.

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