Zobrazeno 1 - 10
of 23
pro vyhledávání: '"K. W. Perrott"'
Autor:
K W Perrott
Publikováno v:
British Dental Journal. 223:819-822
A recent ecological study found a statistically significant association of attention deficit hyperactivity disorder (ADHD) prevalence in youth with exposure to fluoride in fluoridated water. However, it included only household income as a possible co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cae8e436f520379624a674b5e46b185c
https://doi.org/10.1038/sj.bdj.2017.988
https://doi.org/10.1038/sj.bdj.2017.988
Autor:
D. C. Edmeades, K. W. Perrott
Publikováno v:
New Zealand Journal of Agricultural Research. 47:11-21
Calcium (Ca) plays a vital role in the structural integrity of soils, plants, and animals. This review considers the Ca status of New Zealand pastoral soils and examines the Ca requirements of pastures and animals. Against this background the diagnos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::755ba039e1d59a4e53e8a5d3f9b03ff2
https://doi.org/10.1080/00288233.2004.9513566
https://doi.org/10.1080/00288233.2004.9513566
Autor:
M. J. Kear, K. W. Perrott
Publikováno v:
Communications in Soil Science and Plant Analysis. 32:2133-2144
Conventional soil phosphorus (P) tests have been found unreliable where direct application phosphate rock (PR) is used. However, the iron oxide-impregnated filter paper (Pi) and mixed anion/cation ion-exchange membrane tests have been suggested as be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d00440ce5a678888fc19c74a2cec7f36
https://doi.org/10.1081/css-120000274
https://doi.org/10.1081/css-120000274
Autor:
K. W. Perrott, M. J. Kear
Publikováno v:
Communications in Soil Science and Plant Analysis. 31:2007-2017
Field testing of fertilisers is expensive and slow. Laboratory testing procedures are preferred, at least for initial comparisons of materials. However, equilibrium solubility measurements can give misleading results, especially when the fertiliser c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94e994160b55a14391d468a26aba2b42
https://doi.org/10.1080/00103620009370558
https://doi.org/10.1080/00103620009370558
Autor:
R. G. Wise, K. W. Perrott
Publikováno v:
Communications in Soil Science and Plant Analysis. 31:1809-1824
Soil P tests are not reliable for the estimation of soil phosphorus status where reactive phosphate rock (RPR) has been used as a direct application fertiliser. This is because the soil tests used ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63a037cd74bee4c6073420f3700af86b
https://doi.org/10.1080/00103620009370539
https://doi.org/10.1080/00103620009370539
Autor:
A.G. Sinclair, M. J. Hedley, Surinder Saggar, P. E. H. Gregg, K. W. Perrott, I. S. Cornforth, Rob White
Publikováno v:
Nutrient Cycling in Agroecosystems. 55:35-50
Soil tests suitable for estimating the phosphorus (P) status of soils fertilised with soluble or sparingly soluble P fertilisers (reactive phosphate rock) were evaluated using the New Zealand Ministry of Agriculture Technology (NZMAFTech) ‘National
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0bd5e7c653e6865eeb166d956e37cbf
https://doi.org/10.1023/a:1009868032532
https://doi.org/10.1023/a:1009868032532
Publikováno v:
Proceedings of the New Zealand Grassland Association. :133-137
The dissolution rate of Sechura phosphate rock (particle size 75-150 pm) was determined at 95 New Zealand sites with a range of soil and environmental properties. Rates ranged from 0 to 70% of the phosphate rock dissolved per year with an average dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2fce79a99e700d2c7009ad26d71b8dd
https://doi.org/10.33584/jnzg.1995.57.2171
https://doi.org/10.33584/jnzg.1995.57.2171
Publikováno v:
Fertilizer Research. 35:67-82
Soil phosphorus (P) tests have usually been calibrated using regression relationships between test values and crop yields for soils with a history of soluble P fertilizer use. However, the regression relationships have frequently been found to be dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::126f67aedfea029b823d745bb62ac449
https://doi.org/10.1007/bf00750221
https://doi.org/10.1007/bf00750221
Autor:
R. G. Wise, K. W. Perrott
Publikováno v:
New Zealand Journal of Agricultural Research. 36:157-162
Some features of the iron oxide-impregnated filter paper test (Pi test) for soil phosphorus (P) were investigated with a range of New Zealand soils. Soil particles were found to adhere to the filter-paper surface, even after careful rinsing, and cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a186b978327887d1df148056564ef385
https://doi.org/10.1080/00288233.1993.10427497
https://doi.org/10.1080/00288233.1993.10427497
Publikováno v:
Fertilizer Research. 34:141-151
Six phosphate rocks (PRs) of varying reactivities were compared with monocalcium phosphate (MCP) in a glasshouse experiment growing perennial ryegrass (Lolium perenne cv. Nui) as the test plant on four soils of contrasting P sorption capacity and exc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::900b1207071400df53429a0094a66965
https://doi.org/10.1007/bf00750109
https://doi.org/10.1007/bf00750109