Publication Date

1990

Document Type

Report

DPIRD Collections

Grains and field crops

Abstract

J.S.Yeates and M.F.Clarke started these experiments. In January 1990 M.D.A. Bolland replaced J.S. Yeates (who became Regional Manager of the Northern Agricultural Region) as the Research Officer responsible for the management of the long-term experiments, and to continue the research on the topic.

In the experiments the fertilizers wee applied in autumn (March-April) in the years listed in the tables.

Trial 80AL4

Location: Cuthbert.

A new experiment was started in 1989 to compare two partially acidulated rock phosphate (PARP) fertilizers with ordinary (single) superphosphate (OSP).

Trial 84AL32

Location: Denmark

The fertilizers compared are ordinary (single) superphosphate (OSP). New (pre 1990) Coastal Superphosphate (NCS), Island (apatite) rock phosphate and Calciphos (500 degrees C crandallite-millisite rock phosphate from Christmas Island).

Trial 84AL33

Location: Denmark

The phosphatic fertilizers compared were applied once only, in the years 1984 to 1988. the fertilizers compared were: ordinary (single) superphosphate (OSP), new (pre 1990) coastal superphosphate (NCS), Island (apatite) rock phosphate (IRP) and Calciphos (CAL). Data are the mean of three replicates.

Trial 84AL35

Location: Denmark

Comparison of ordinary (single) superphyosphate (OSP) and new (pre 1990) coastal superphosphate (NCS as sulphur sources for pasture. The fertilizers were applied at the levels of S shown each year (repeated 'rates'). Data are mean of three replicates.

Trial 84HA17

Location: West Harvey.

Comparison of different P fertilizers when levels of fertilizer (O, 2.5, 5, 10, 20, 40, 100 kg P/ha for each fertilizer) were applied to the same plot each year (i.e. repeated 'rates'). The fertilizers compared were: ordinary (single) superphosphate (OSB), new (pre 1990) coastal superphosphate (NCS), Island (apatite) rock phosphate (IRP) and Calciphos (CAL). Data are the mean of three replicates.

Trial 84HA18

Location: West Harvey

To compare several fertilizers as sources of P for pasture. The fertilizers were applied once only in the years listed. The fertilizers compare were ordinary (single) superphosphate (OSB), new (pre 1990) coastal superphosphate (NCS), Island (apatite) rock phosphate (IRP) and Calciphos (CAL). Data are the mean of three replicates, measure on October 30 1989.

Trial 84HA19

Location: West Harvey

A comparison of ordinary (single) superphosphate (OSP) and new (pre 1990) coastal superphosphate (NCS) as sulphur sources for pastures. The fertilizers were applied at seven levels, using the same level each year (repeated 'rates). Data are the mean of three replicates, measured October 31, 1989).

Trial 84HA20

Location: West Harvey

A comparison of ordinary (single) superphosphate (OSP) and new (pre 1990) coastal superphosphate (NCS) as sulphur sources for pasture. The fertilizer levels were only applied once only in the years listed. Herbage yields were measured on October 31, 1989.

Trial 84HA24

Location: Pinjarra

Comparison of four sources of phosphorous as fertilizers for pastures. The fertilizers compared are ordinary (single) superphosphate (OSB), new (pre 1990) coastal superphosphate (NCS), Island (apatite) rock phosphate (IRP) and Calciphos (CAL). The fertilizers were applied at the same levels listed each year (repeated 'rates'). Yields were measure on October 23, 1989.

Trial 84HA25

Location: Pinjarra

Comparison of the effectiveness of different P fertilizers for pasture production. The fertilizers compared are ordinary (single) superphosphate (OSB), new (pre 1990) coastal superphosphate (NCS), Island (apatite) rock phosphate (IRP) and Calciphos (CAL). Levels of each P fertilizer were applied once only in the years listed. Results are the mean of three replicates, and yields were measured on October 19, 1989.

Trial 84HA26

Location: Pinjarra

This experiment compares ordinary superphosphate (OSP) and new (pre 1990) coastal superphosphate (NCS) as sulphur sources for pastures. The levels of each fertilizer listed in the table were applied every year (repeated 'rates'). Data are mean of three replicates. Yields are measured on October 26, 1989.

Trial 84HA27

Location: Pinjarra

Comparison of ordinary superphosphate (OSP) and new (pre 1990) coastal superphosphate (NCS) as sulphur sources for pastures when levels of the fertilizers were applied once only in the years listed. Yields were measured on October 23, 1989.

Trial 84HA28

Location: Yarloop.

Comparison of different P fertilizers for pasture productions. The fertilizers were applied at the levels listed every year (repeated 'rates'). The fertilizers compared were ordinary (single) superphosphate (OSP), new (pre 1990) coastal superphosphate (NCS), Island (apatite) rock phosphate (IRP) and Calciphos (CAL).

Trial 84HA28 (1989 PARP trial)

Location: Yarloop

In 1989, two P fertilizers were compared in a new experiment adjacent to the original 1984 experiment. The fertilizers compared were ordinary (single) superphosphate (OSP) and the new 1989 partially acidulated rock phosphate (PARP) made by CSBP and Farmers Ltd from North Carolina reactive apatite rock phosphate. Data are mean of three replicates. Yields were measured on October 27, 1989.

Trial 86HA1

Location: Cookernup

Comparison of different fertilizers as P sources for pasture. The fertilizers were applied at the levels listed every year (repeated 'rates'). The fertilizers compared are ordinary (single) superphosphate (OSP) , new (pre 1990) coastal superphosphate , Island (apatite) rock phosphate (IRP) and North Carolina (reactive apatite) rock phosphate (NCRP). Data are means of three replicates. Yields were measured on November 2, 1989.

Trial 86HA2

Location: Coolup.

The experiment compare ordinary (single) superphosphate (OSP), new (pre 1990) coastal superphosphate, Island (low-reactive apatite) rock phosphate (IRP) and North Carolina (reactive apatite) rock phosphate (NCRP) as P fertilizers for pasture. The fertilizers were applied at the levels shown in the table every year (repeated 'rates). Data are the mean of three replicates. Yields were measured on November 3, 1989).

Trial 88V10

Location: Vasse Research Station

The experiment compares ordinary (single) superphosphate (OSP), new (pre 1990) coastal superphosphate (NCS) and Island (apatite) rock phosphate (IRP) a P fertilizers for pasture. These fertilizers are applied at the levels listed in the table each year (repeated 'rates'). Data are the mean of three replicates. Yields are measured on October 17, 1989.

Trial 88V11

Location: Vasse Research Station

This experiment compares ordinary (single) superphosphate (OSP), new coastal superphosphate (NCS) as sulphur fertilizers for pastures. The fertilizers were applied at the levels listed in the table each year (repeated 'rates'). Data are the mean of three replicates. Yields were measured on October 17, 1989.

Number of Pages

24

Keywords

Western Australia

Disciplines

Agronomy and Crop Sciences | Fresh Water Studies | Inorganic Chemistry | Organic Chemistry | Soil Science

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