Soil sulfur status, sulfur fertiliser responses and rainfall sulfur accessions at trial sites in the National Reactive Phosphate Rock Project

1997 ◽  
Vol 37 (8) ◽  
pp. 995 ◽  
Author(s):  
G. Anderson ◽  
G. J. Blair ◽  
M. Crestani ◽  
D. Lewis
Keyword(s):  
Phosphate Rock ◽  
Direct Application ◽  
First Year ◽  
Soil Profiles ◽  
North West ◽  
The North ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock ◽  
Chemical Extractants ◽  
Soil Sulfur

Summary. The sulfur (S) status of the National Reactive Phosphate Rock Project trial sites was determined using 2 chemical extractants KCl-40 (0.25 mol KCl/L heated to 40°C) and MCP (0.01 mol mono-calcium phosphate/L). There were marked differences between sites in KCl-40- extractable S down the soil profile. Soil profiles were classified into 4 groups according to the shape of the extractable S profile. KCl-40 was better able to distinguish between responsive (significant at P = 0.10 only) and unresponsive sites than MCP. Mean S accession in rainfall over the 3 years ranged from 0.40 kg/ha . year at Jericho (site T17) in the centre of Tasmania to 20.33 kg/ha . year at Smithton (site T16) on the north-west coast of Tasmania. The proportion of S-responsive sites increased from 26% in the first year to 43, 42 and 48% in years 2, 3 and 4 respectively. Such a large proportion of S-responsive sites limits the use of direct application of reactive phosphate rock fertiliser.

scholarly journals Direct application of reactive phosphate rock on improving maize yield in tidal swampland

2021 ◽  
Vol 648 (1) ◽  
pp. 012175
Author(s):  
A F Siregar ◽  
Husnain ◽  
I W Suastika ◽  
N P S Ratmini ◽  
I A Sipahutar ◽  
...  
Keyword(s):  
Phosphate Rock ◽  
Maize Yield ◽  
Direct Application ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock

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

The agronomic effectiveness of reactive phosphate rocks 1. Effect of the pasture environment

1997 ◽  
Vol 37 (8) ◽  
pp. 921 ◽  
Author(s):  
P. W. G Sale ◽  
R. J. Gilkes ◽  
M. D. A. Bolland ◽  
P. G. Simpson ◽  
D. C. Lewis ◽  
...  
Keyword(s):  
North Carolina ◽  
Phosphate Rock ◽  
Surface Soil ◽  
Annual Rainfall ◽  
Triple Superphosphate ◽  
Agronomic Effectiveness ◽  
P Sorption ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock ◽  
Very High

Summary. The agronomic effectiveness of directly applied North Carolina reactive phosphate rock was determined for 4 years from annual dry matter responses at 26 permanent pasture sites across Australia as part of the National Reactive Phosphate Rock Project. Fertiliser comparisons were based on the substitution value of North Carolina reactive phosphate rock for triple superphosphate (the SV50). The SV50 was calculated from fitted response curves for both fertilisers at the 50% of maximum yield response level of triple superphosphate. The reactive phosphate rock was judged to be as effective as triple superphosphate in the 1st year (and every year thereafter) at 4 sites (SV50 >0.9), and was as effective by the 4th year at 5 sites. At another 9 sites the reactive phosphate rock was only moderately effective with SV50 values between 0.5 and 0.8 in the 4th year, and at the final 8 sites it performed poorly with the 4th year SV50 being less than 0.5. Pasture environments where the reactive phosphate rock was effective in the 1st year were: (i) those on sandy, humic or peaty podsols with an annual rainfall in excess of 850 mm; (ii) those on soils that experienced prolonged winter inundation and lateral surface flow; and (iii) tropical grass pastures in very high rainfall areas (>2300 mm) on the wet tropical coast on North Queensland. The highly reactive North Carolina phosphate rock became effective by the 4th year at sites in southern Australia where annual rainfall exceeded 700 mm, and where the surface soil was acidic [pH (CaCl2) <5.0] and not excessively sandy (sand fraction in the A1 horizon <67%) but had some phosphorus (P) sorption capacity. Sites that were unsuitable for reactive phosphate rock use in the medium term (up to 4 years at least) were on very high P-sorbing krasnozem soils or high P-sorbing lateritic or red earth soils supporting subterranean-clover-dominant pasture, or on lower rainfall (< 600 mm) pastures growing on soils with a sandy A1 horizon (sand component >84%). No single environmental feature adequately predicted reactive phosphate rock performance although the surface pH of the soil was most closely correlated with the year-4 SV50 (r = 0.67). Multiple linear regression analysis found that available soil P (0–10 cm) and the P sorption class of the surface soil (0–2 cm), together with annual rainfall and a measure of the surface soil"s ability to retain moisture, could explain about two-thirds of the variance in the year-4 SV50 . The results from this Project indicate that there are a number of specific pasture environments in the higher rainfall regions of Australia where North Carolina reactive phosphate rock can be considered as an effective substitute P fertiliser for improved pasture.

scholarly journals P05 Involving patients in the discussion about results from the National Early Inflammatory Arthritis Audit

Rheumatology ◽  
2020 ◽  
Vol 59 (Supplement_2) ◽  
Author(s):  
Oliver Wade ◽  
Jack Loh ◽  
Joshua Withers ◽  
Sarah Fish ◽  
Elizabeth MacPhie
Keyword(s):  
Rheumatoid Arthritis ◽  
Inflammatory Arthritis ◽  
First Year ◽  
Quality Improvements ◽  
North West ◽  
Patient Support Group ◽  
Patient Pathway ◽  
The North ◽  
Early Inflammatory Arthritis

Abstract Background The National Early Inflammatory Arthritis Audit (NEIAA) has provided the opportunity for rheumatology services to benchmark the care they provide. It provides a mechanism to identify where services can make improvements and to raise awareness about inflammatory arthritis. We felt it important to share our results with patients and involve patients in the discussion about how we improve the service we deliver. This project outlines how we went about doing this. Methods Data submitted to the NEIAA online tool were downloaded for analysis. This included all patients recruited during the first year of the audit. Results were presented initially to the Rheumatology Multi-Disciplinary Team. Driver diagrams were developed by the team and areas for improvement identified. A patient poster for the waiting area was also developed. This provided information about our performance in the audit and what changes we were looking to make. Results, driver diagrams and the patient poster were then presented to our National Rheumatoid Arthritis Society (NRAS) patient support group at one of their lunchtime meetings. We met again two weeks later with members from the patient group to get feedback on the driver diagrams and patient poster. Results Results from the first year of the audit demonstrated that there was significant room for improvement across all seven quality standards. Driver diagrams identified areas for improvement across the whole patient pathway. Forty-five patients and carers attended the lunchtime meeting presentation. Patients identified various areas where they could get involved with improving the patient pathway. These included putting up posters in the community to raise awareness about rheumatoid arthritis and running another Rheumatoid Arthritis Awareness Day. Other proposals were to provide more lunchtime meetings to improve understanding about the condition and management and promote aspects of self-management and developing the role of the Expert Patient locally to support newly diagnosed patients. The patient poster received lots of positive comments, it was suggested that we remove any statistics which might cause alarm and be difficult to interpret and to focus on what quality improvements had already happened locally. Conclusion Involving patients in the discussion has been a fascinating and rewarding experience. Patients have been empowered and their input has been valued. Patients have provided additional suggestions as to how they can get involved to support the service and improve the patient pathway. The patient poster now tells a positive story and acknowledges our unsatisfactory performance in the first year of the audit and more importantly focuses on what we are doing to improve the service we deliver. Disclosures O. Wade None. J. Loh None. J. Withers None. S. Fish None. E. MacPhie Other; EM is the secretary of the North West Rheumatology Club; meetings are supported by an unrestricted educational grant from UCB.

Chemical effects in commercial and laboratory mixtures of ?reactive? phosphate rock and acidulated fertilisers

1992 ◽  
Vol 31 (1) ◽  
pp. 111-118 ◽  
Author(s):  
A. C. Braithwaite ◽  
A. C. Eaton ◽  
P. S. Groom
Keyword(s):  
Phosphate Rock ◽  
Chemical Effects ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock

scholarly journals Effect of reactive phosphate rock to corn on acid sulphate soil in South Kalimantan

2020 ◽  
Vol 484 ◽  
pp. 012093
Author(s):  
Wahida Annisa ◽  
Husnain ◽  
Fadjri Djufry
Keyword(s):  
Phosphate Rock ◽  
Acid Sulphate Soil ◽  
Acid Sulphate ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock

Partially acidulated reactive phosphate rock (PAPR) fertilizer and its reactions in soil

1991 ◽  
Vol 28 (3) ◽  
pp. 295-304 ◽  
Author(s):  
D. C. Golden ◽  
R. B. Stewart ◽  
R. W. Tillman ◽  
R. E. White
Keyword(s):  
Phosphate Rock ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock

Effects of Combinations of Triple Superphosphate and a Reactive Phosphate Rock on Yield and Phosphorus Uptake by Corn

1987 ◽  
Vol 51 (6) ◽  
pp. 1656-1658 ◽  
Author(s):  
S. H. Chien ◽  
F. Adams ◽  
F. E. Khasawneh ◽  
J. Henao
Keyword(s):  
Phosphate Rock ◽  
Phosphorus Uptake ◽  
Triple Superphosphate ◽  
Reactive Phosphate ◽  
Reactive Phosphate Rock
Sign in / Sign up

Export Citation Format

Share Document