XIII. South Kaipara, Northland

Piggot, G. H.; Baars, J. A.; Cumberland, G. L. B.; Honore, E. N.

doi:10.1080/03015521.1978.10426012

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…The need was emphasised by a recent demonstration, on the Central Plateau area of the North Island, of large responses in all classes of stock to direct supplementation with sodium chloride in circumstances where the local feed had been found by chemical analysis to be low in sodium and high in potassium (Joyce & Brunswick 1975 Dorofaeff (1968) and Piggot et al (1976). During the study additional samples were collected to produce a more even coverage of the whole country.…”

Section: Introductionmentioning

confidence: 99%

Sodium and potassium content of topdressed pastures in New Zealand in relation to plant and animal nutrition

Smith¹,

Middleton²

1978

New Zealand Journal of Experimental Agriculture

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An extensive geographical survey was carried out to obtain information on the sodium and potassium content of topdressed grass-clover pastures in New Zealand. Results indicate that in many areas, especially away from the influence of sea spray, herbage sodium levels are below those estimated to be required by grazing animals. The associated potassium contents of these pastures, particulady in the North Island. are well in excess of animal needs and generally are more than adequate for plant nutrition. The possible effects on animal health of a low dietary intake of sodium coupled with excessive amounts of potassium are discussed. The importance of sources other than the plant in supplying sodium for animal needs is also pointed out. It is emphasised that there is an urgent need to assess fertiliser policy more in terms of the requirements of both plants and animals, by a plant analysis and balance sheet approach.

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Section: Introductionmentioning

confidence: 99%

Sodium and potassium content of topdressed pastures in New Zealand in relation to plant and animal nutrition

Smith¹,

Middleton²

1978

New Zealand Journal of Experimental Agriculture

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“…The reasons for this difference are obscure. Wayne has proved better adapted to Northland in commercial culture, and has tended to be higher yielding (Turnbull 1976;Piggot et al 1980). The results for Wayne suggest that, for an adapted cultivar, an optimum plant population under weedfree conditions occurs at between 30-40 plants/m 2 in Northland, whereas for the poorer adapted Amsoy, a yield plateau will be reached at about this plant population.…”

Section: Discussionmentioning

confidence: 75%

Soybeans in Northland: Seeding rate for 15 cm row spacing

Piggot¹,

Farrell²

1982

New Zealand Journal of Experimental Agriculture

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Soybeans (full-season cultivars Amsoy and Wayne) were sown in narrow (15 em) rows in seeding rate trials on 3 sites in late spring 1977 in Northland. Plant populations in each trial ranged from 5 to 110 plants/m 2 . As seeding rate was increased, plants were taller and displayed greater internode length, a reduction in node number, and the first pods were set on higher nodes. There was a marked reduction in pods per plant as seeding rate was increased, but only a slight decrease in seeds per pod and no effect on seed weight. For Wayne, the better adapted cultivar, an 'optimum' plant population for grain yield was displayed at about 30 plants/m 2 at 2 sites, and 60 plants/m 2 at a weedy site. Amsoy displayed no evidence of an optimum plant population for grain yield.

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“…New Zealand has a significant history of characterizing this pasture production to understand that variation and provide resources to assist farmers in enterprise choice and systems design. These variations in climatic conditions result in large variation in the amount and seasonal distribution of pasture production (e.g., Radcliffe, 1974;Baars, 1976;Piggot et al, 1978;Roberts and Thomson, 1984). Enterprises are chosen to suit local pasture growth conditions, aimed at maximizing pasture use and minimizing imported feed (McCall and Sheath, 1993).…”

Section: Introductionmentioning

confidence: 99%

Integrating Digital Technologies to Aid Grassland Productivity and Sustainability

Stevens

Thompson

Johnson

et al. 2021

Front. Sustain. Food Syst.

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Digital technologies provide an opportunity to further increase the sustainability and productivity of grasslands and rangelands. Three resources are key to that change. These are the soil on which forage grows, the forages that grow on those soils and the animals that use the forage resource as food. This paper describes elements of technologies to measure and monitor these resources and provides some insights on combining that knowledge and controlling the animal's utilization through virtual fencing. There are many potential challenges to the application of digital technologies to pastoral farming. These often require the calibration of digital signals to define biophysical characteristics. The significant repository of historic data of pasture growth over many geo-climatic regions, for example, provides New Zealand with an opportunity to accelerate that development. Future advances in rangeland use, nutrient deposition, greenhouse gas emissions and the provision and utilization of high quality and quantity will be enabled by the application of digital technologies at scale, under the control of virtual fencing. Digital technologies may provide the means to maintain or enhance ruminant production from grassland in a sustainable operating space into the future.

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XIII. South Kaipara, Northland

Cited by 10 publications

References 9 publications

Sodium and potassium content of topdressed pastures in New Zealand in relation to plant and animal nutrition

Sodium and potassium content of topdressed pastures in New Zealand in relation to plant and animal nutrition

Soybeans in Northland: Seeding rate for 15 cm row spacing

Integrating Digital Technologies to Aid Grassland Productivity and Sustainability

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