1976 Phosphorus and sulphur sources trials

PHOSPHORUS SOURCES TRIALS (A) Pasture trials i) High rainfall areas a) Sand: 76BU1 - New land P sources trial, T. O\u27Byrne, Yalingup. 76BU4 - Old land P sources trial, T. Coombes, Busselton. 76EX37 - Young land P sources trial, F. Fels, Esperance. b) Gravel: 76MT10 - New land P sources trial, Mt. Barker Research Station. 76MT9 - Old land P sources trial, Mt. Barker Research Station. ii) Medium rainfall areas: a) Sand 75N07A -New land P sources trial, D. Gillespie, East Chittering. b) Gravel: 75N07B - New land P sources trial, D. Gillespie, East Chittering. iii) Low rainfall areas a) Sand: 76WH9 - New land P sources trial, Wongan Hills Research Station. 76WH10 - Young land P sources trial Wongan Hills Research Station. 76WH14 - Old land P sources trial, Wongan Hills Research Station. b) Gravel: 76N4 - New land P sources trial, Newdegate Research Station. 76N6 - Old land P sources trial, Newdegate Research Station. 76LG6 - Young land P sources trial, Clarke, Newdegate. (B) Crop Trial: 76M028, P sources trial on lupins and wheat, N. Girando, North Gingin. 2. SULPHUR SOURCES TRIALS (A) Pasture Trials i) Long term S sources trials 76BU5 - Old land sulphur sources trial, P. Coombes, Busselton. 76KE1 - Old land sulphur sources trial, J. Hill, Keysbrook. ii) Short term S sources trial 76KE2 - G. Elliot, Keysbrook. (B) Crop Trials 76M029 - Lupins sulphur trial, N. Girando, North Gingin. TRIALS GIVING NO RESULTS IN 1976 Because of the very dry start to the season the following trials suffered severely from drought and yielded no results in 1976: 76M028 - P sources lupin. and wheat. 76M029 - Lupin sulphur trial. 76WH9 - P sources trial (pasture). 76WH10 - P sources trial (pasture). 76N4 - P sources trial (pasture). 76LG6 - P sources trial (pasture) trial. No further reference will be made to these trials in this summary

Regional Trials at Esperance

Trials on Salmon Gums Research Station. The trials on the research station are aimed at making the maximum use of the rainfall for cropping. On the heavy Kumarl soils the trials include fallow trials, furrow seeding trials, seeding rate and time of seeding trials, and trials assessing methods of getting the crops in as early as possible; these trials being repeated on fallow and ley Kumarl soil. On the sandy surfaced soils the trials assess methods of sowing the crops as early as possible, and checking if there are different nitrogen requirements for cereals sown by minimum tillage or mechanical methods. These sandy surfaced soils are very prone to wind erosion and thus fallowing is not feasible, and minimum tillage methods may be of benefit. Trial no: 79SG13 - Fallow trial on kumarl soil. 79SG27 - Fallow trial on kopi soil. 80SG3 - Methods of cultivation trial for cereals on kopi soils. 80SG4 - Methods of cultivation trial for cereals on fallowed kopi soils. 80SG5 - Methods of cultivation trial for cereals on kumarl soil. 80SG6 - Methods of cultivation trial for cereals on fallowed kumarl soil. 80SG7 - Methods of cultivation trial on circle valley sand. 80SG8 - Mini road trial for cereals grown on kumarl soil. 80SG9 - Mini road trial for cereals grown on fallowed kumarl soil. 80SG10 - Mini road trial for cereals grown on kopi soil. 80SG11 - Seeding rate trial for cereals grown on kumarl soil. 80SG12 - Seeding rate trial for cereals grown on fallowed kumarl soil. 80SG14 - Time of seeding trial for cereals grown on followed kumarl soil. 80SG19 - Methods of cultivation nitrogen trial for wheat on circle valley sand. 80SG33 - Old land superphosphate maintenance trial. Trials not harvested during 1980 due to poor growth were: 79SG27, 80SG4, 80SG10

Cardiovascular effects of calcium supplementation

Peer reviewedPostprin

1975 Phosphorus and sulphur sources trials

1. Sulphur sources trials (a) Newdegate Gypsum Trials: Yarloop - 75YA3, Bridgetown - 75BR10, Busselton - 75BU6, Alexandria Bridge - 75BU7. (b) Gyplap - FeS04 Trial: McAlinden - 75BY4. 2. Phosphorus source trials: E. Chittering - 75NO7A E. Chittering - 75NO7

Pasture trials at Esperance

Introduction. Most of the 1981 data viz seed yield results, and hardseed data, has not yet been completely processed, and thus only some of the data can be presented in this summary. Section i: Medic species trials – 80SG39, 80SG23, 80SG24, 80ES65(a), 80ES21 (a). Section ii: Lucerne variety trials – 81ES28, 81ES25, 81ES29, 81ES30, 81ES31

Phosphorus Nutrition

76WH10, 77WH2, 77MT2, Phosphorus sources trial. 84NO69, 84E31, 84M63, Residual value of phosphate fertilisers. 86M1, Residual value of superphosphates for lupins and wheat grown in a 1-year lupin: 1-year wheat rotation. 85NO63, 85KA79, Assessment of different soil and plant tissue methods for determining the phosphorus requirement of several crop and pasture species. 85KA78, Assessment of different soil and plant tissue methods for determining the P requirements of crop and pasture species. 86N01, Residual value of superphosphate. 85BA34, Residual value of superphosphate for lupins, wheat and barley. 85BA35, Residual value of superphosphate for lupins:oat:wheat rotatio

Regional trials at Esperence

79ES5 Methods of resowing clover into old Esperance sandplain: pasture. Condingup. 79ES6 Methods of resowing clover into old Esperance sandplain pasture. Condingup. 79ES34 Methods of resowing clover into old Esperance sandplain: pasture. Yerangatup. 79ES7 Nutrient response definition trial for clover on sandplain pasture. Gibson. 79ES8 Nutrient response definition trial for clover on sandplain pasture. Gibson. 79ES9 Nutrient response definition trial for clover on sandplain pasture. Condingup. 79ESl0 To test the need for lime in regenerating clover in old Esperance sandplain pastures. Condingup. 79ES11 To test the need for lime in regenerating clover in old Esperance sandplain pastures. Gibson 79ES12 To test the need for lime in regenerating clover in old Esperance sandplain pastures. Gibson. 79ES31(a) Pasture species screening trial Mt Ney 79ES31(b) Medic species Evaluation trial Mt. Ney 79ES32 Pasture species screening trial Mt Ney 79ES33 Pasture species screening trial Condingup 79ES49 Pasture species screening trial Condingup TRIALS ON ESPERANCE DOWNS RESEARCH STATION 79E2 Methods of cultivation trial for four crop species 79E3 Methods of cultivation nitrogen trial 79E4 Methods of cultivation phosphorus trial 79E6 Time of seeding minimum tillage trial for barley and rapeseed 79El5 1:1 rotation trial for wheat comparing a pure clover ley with a pasture ley 79E33 Grain drying trial for barley 79E34 Grain drying trial for wheat TRIALS ON SALMON GUMS RESEARCH STATION 79SG12 Methods of cultivation trial for cereals 79SG13 Fallow trial 79SG14 Mini Road trial for cereals on fallowed kumarl soils 79SG15 Mini Road trial for cereals on kumarl soils 79SG16 Mini Road trial for cereals on kopi soils 79SG17 Seeding rate trial for cereals on fallowed kumarl soils 79SG18 Seeding rate trial for cereals on kumarl soils 79SG19 Time of seeding trial for cereals on fallowed kumarl soils 79SG20 Time of seeding trial for cereals on kumarl soil 79SG21 Medic species evaluation trial. Salmon Gums 79SG22 Medic species evaluation trial W.Salmon Gums 79SG23 Medic species evaluation trial Circle Valley 79SG27 Fallow trial for kopi soils CONTINUING TRIALS 76ES37 Phosphorus sources trial Yerangatup 77E1 Phosphorus sources trial. Esperance Downs Research Statio

Pasture trials of Esperance

(82ES55) - Serradella Co X N trial. R. Burchell, Myrup. Aim: To determine whether Co or low winter temperatures limit the growth of serradella in winter months. (83ES46) - Serradella N trial. High School block, Neribup. Aim: To test whether dry matter production of serradella and subterranean clover are limited by symbiotic nitrogen fixation in mid winter. (82ES46) - T brachycalycinum burr burial trial. J. Royle, Condingup. Aim: To determine the importance of burr burial for T. brachycalycinum for the formation of burrs and seed

Improving fertiliser management: redefining the relationship between soil tests and crop responses for wheat in WA

Most soils in Western Australia (WA) are highly weathered with very low levels of phosphorus. WA soils initially contained adequate indigenous soil potassium for cropping but removal of potassium over time in harvested grain has gradually resulted in the some soils becoming potassium-deficient for grain production. Fertiliser costs represent a significant part of the variable costs of growing crops in WA. Chen et al. (2009) identified the need for updated soil test interpretations due to substantial changes in farming systems, fertiliser practices and crop yield potential. The aims of this study were (1) to compile experimental data containing the standard soil test measurements and observed wheat crop yield responses for both nil and fertilised treatments across different soil types and seasons from published or unpublished sources, and (2) to critically analyse soil test-crop response relationships to derive better critical soil test values in soils and environments suitable for wheat grain production in WA

Phosphorus source trials

HIGH RAINFALL AREAS. SAND: 76BU1 - New land phosphorus sources trial (pasture) T. O\u27Bryne, Yallingup. 76BU4 - Old land phosphorus sources trial (pasture) T. Combe, Busselton. GRAVEL: 76MT10 - New land phosphorus sources trial (pasture) Mt. Barker Research Station. 76MT9 - Old land phosphorus sources trial (pasture) Mt. Barker Research Station. 77MT1 - New land particle size and method of cultivation phosphorus sources trial (pasture) Mt. Barker Research Station. 77MT2 - Old land phosphorus sources cropping trial (oats every third year). Mt. Barker Research Station. MEDIUM RAINFALL AREAS. SAND: 77E537 - Young land phosphorus sources trial (pasture) F. Fels, Esperance. 77E1 - New land phosphorus sources trial (pasture) Esperance Downs Research Station. 77E2 - Old land phosphorus sources trials (pasture, cropped every third year to oats.) Esperance Downs Research Station. 78E4 - Old land phosphorus sources cropping trial (cropped to barley every third year). Esperance Downs Research Station. GRAVEL: 75N07B - New land phosphorus sources trial (pasture) G. Watson, E. Chittering. 77M016 - New land phosphorus sources cropping trial (wheat) Martindale Pty Ltd., \u27Newdale\u27, New Norcia. LOW RAINFALL AREAS. SAND: 76WH9 - New land phosphorus sources trial (wheat) Wongan Hills Research Station. 76WH10 - Young land phosphorus sources trial (wheat and sub clover ley). Wongan Hills Research Station. 77WH2 - Old land phosphorus sources cropping trial (wheat every third year). Wongan Hills Research Station. GRAVEL: 76N4 - New land phosphorus sources trial (pasture and crop) Newdegate Research Station. 76N6 - Old land phosphorus sources trial (cropped every third year) Newdegate Research Station. 76LG6 - Young land phosphorus sources trial (pasture and crop) Newdegate Research Station. Trials giving no results during 1978 : - 76BU1 - Clover scorch severely affected the trial and pasture was dead on arrival for assessment. 77E1 - Clover had dried off on arrival for assessment. 76ES37 - The trial was sprayed with too large a dose of sprayseed (to remove grasses and capeweed) and killed clover. 76N4 - Was not harvested. These trials will not be mentioned further in this summary