Graeme Blair

University of New England

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Co-Authors

Rod Lefroy

International Center for Tropical Agriculture

R. D. B. Lefroy

International Center for Tropical Agriculture

Anthony Whitbread

International Institute of Tropical Agriculture

Chris Guppy

University of New England

J. M. Scott

University of New England

A. R. Till

University of New England

M. R. McCaskill

Agriculture Victoria

G. C. Anderson

Government of Western Australia

Yothin Konboon

UbonRatchathani Rice Research Center

C. P. Mamaril

International Rice Research Institute

Cooperative Institutions

University of New England

Commonwealth Scientific and Industrial Research Organisation

Plant Industry

Agriculture and Food

New South Wales Department of Primary Industries

University of Western Australia

University of Sydney

University of Guelph

University of Queensland

University of California, Berkeley

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Evaluating the Performance of the GrazFeed Model for Predicting Sheep Productivity on a Range of Pasture Types

Zhong Jun Yao J. M. Scott Graeme Blair

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Citations (2)

Measurement of Carbon and Nutrient Dynamics in Soil-Plant Systems and the Role of Plant Residues in the Development of Sustainable Cropping Systems

Yothin Konboon Graeme Blair Rod Lefroy

Plant system

Cropping system

Soil nutrients

Soil carbon

Carbon fibers

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The impact of feedlot manure and effluent on nutrient cycling and crop productivity in a high rainfall zone in Australia.

Kaara Klepper Graeme Blair Riaz Ahmad Simon Lott J. A. Moore

Feedlot

Cycling

Nutrient cycle

Crop Productivity

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Plant and Soil (1999)

Anthony Whitbread Graeme Blair Kunnika Naklang Rod Lefroy Sodchol Wonprasaid

Acacia auriculiformis

Cajanus

Plant litter

Litter

Transplanting

10.1023/a:1004519031550

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Citations (36)

Managing crop residues, fertilizers and leaf litters to improve soil C, nutrient balances, and the grain yield of rice and wheat cropping systems in Thailand and Australia

Agriculture Ecosystems & Environment (2003)

Anthony Whitbread Graeme Blair Yothin Konboon Rod Lefroy Kunnika Naklang

Cropping system

Crop Residue

Transplanting

Nutrient Management

Plant litter

Litter

Soil carbon

10.1016/s0167-8809(03)00189-0

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Citations (135)

Sulfur Nutrition of Rice. III. A Comparison of Fertilizer Sources for Flooded Rice

Agronomy Journal (1983)

Solo Samosir Graeme Blair

Abstract Sulfur deficiency in rice (Oryza sativa L.) is becoming a more significant constraint to rice yields as the use of high analysis, low S‐containing fertilizers increases. There is a wide range of sulfatic fertilizers available and these have not been tested, to any degree, under flooded conditions. A pot experiment was conducted on a low fertility Paleudult soil to test the S‐supplying capacity of ammonium sulfate, gypsum, elemental S, and sulfur coated urea (SCU) applied at 30 kg S/ha to flooded rice. At 25 days after transplating (dat), fertilizer source had no significant effect on total top yield and S uptake was lower in the control, elemental S and SCU treatments. By 50 dat S deficiencies were evident in the control and SCU treatments where tiller number, yield, and % S levels were decreased. Sulfur uptake from SCU was not significantly different from the zero S control over the 113 day growing period. At maturity yields and S uptake were not significantly different between the gypsum, elemental S (100% <60 mesh), and ammonium sulfate sources. These results confirm the suitability of fine (100% <60 mesh) elemental S as a S source for rice, and show that S from SCU is not available to flooded rice at least in the first crop after application.

Tiller (botany)

Ammonium sulfate

Ultisol

Coated urea

10.2134/agronj1983.00021962007500020012x

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Citations (9)

A model of S, P and N uptake by a perennial pasture

Fertilizer Research (1990)

M. R. McCaskill Graeme Blair

Root hair

Plant roots

10.1007/bf01120391

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Citations (18)

Modelling nutrient cycles in grazed pasture systems of Southern Australia

Springer eBooks (2001)

Richard J. Simpson Andrew D. Moore Alan E. Richardson J. R. Donnelly Graeme Blair

10.1007/0-306-47624-x_436

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Citations (4)

Crop production, nutrient recovery and hydrology following cattle feedlot manure application.

Kaara Klepper Riaz Ahmad Graeme Blair R. J. Gilkes N. Prakongkep

A field plot experiment was established on a sandy loam Typic Natrustalf, duplex soil in Northern NSW, Australia in 1997, to determine crop response, nutrient recovery, and impacts on surface and subsurface water flow following the application of feedlot manure and effluent. Over the three year study, treatments included a control, (nil manure), moderate annual manure applications (20-25t DM/ha applied every year), a high initial application (60 t DM/ha applied in year 1 only) and an inorganic fertiliser treatment (N, P, K applied every year). Both the moderate annual and high initial manure treatments received supplementary inorganic N fertiliser in years 2 and 3. Successive forage crops of sorghum ( Sorghum bicolour cv. SuperDan) and triticale ( Triticosecale spp .cv. Madonna) were grown with highest total dry matter yields recorded by the manure and inorganic treatments. The highest recovery of N, P and S was in the inorganic treatment (63%, 48% & 32%) and K from the high initial manure treatment (269%). Supplemental N applied to the moderate annual manure treatment tended to increase nutrient recovery mainly through increased yield. Total cumulative surface runoff ranked in descending order was control>inorganic>moderate annual>high initial manure treatment. The high initial manure treatment also recorded the lowest total cumulative subsurface flow (95mm) compared to all other treatments (mean 150mm).

Feedlot

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Response of Carrot 'Daucus carota' L. to Soil Compaction and Mulching

I Gusti Ayu Mas Sri Agung Graeme Blair Nicholas G. Smith

Daucus carota

Soil Compaction

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