1,939 research outputs found
Universality and Clustering in 1+1 Dimensional Superstring-Bit Models
We construct a 1+1 dimensional superstring-bit model for D=3 Type IIB
superstring. This low dimension model escapes the problems encountered in
higher dimension models: (1) It possesses full Galilean supersymmetry; (2) For
noninteracting polymers of bits, the exactly soluble linear superpotential
describing bit interactions is in a large universality class of superpotentials
which includes ones bounded at spatial infinity; (3) The latter are used to
construct a superstring-bit model with the clustering properties needed to
define an -matrix for closed polymers of superstring-bits.Comment: 11 pages, Latex documen
Pasture manipulation on the Esperance sandplain, C W Thorn, 1982 1983
Introduction.
Methods.
Results
Pasture Manipulation - Grass control the year prior to cropping
Pasture manipulation - grass control the year prior to cropping. Aim 1. To measure the effects of various grass control treatments on pasture production and composition in the spraying year. 2. To measure the effects of grass control on wheat. Trial – 80MO41, 80MO40, 80AB2
Rotation trial for wheat
Trial report.
Treatments.
Measurements.
Results and discussion.
Conclusion
Grass control in pastures.
Crop Yields after Pasture Manipulation in 1980. Effect of Grass Control on Pasture Production. Effect of Grass Control on Animal Production. Pasture Density Effects and Composition on Soil Nitrogen. The Effect of Kerb (R) on Rapeseed, Linseed and Barley Grass. 80M041, 80M040, 80AB2, 81A23, 81 A188, 81Ba2, 81 N3, 81 N2, 81 A11 81N21, 81Ka1, 81Ka2, 81 Na3, 81NO5, 81MO
Grass control in legume-grass pastures.
1. Crop results following grass control in 1981 Trials. 81AL1, 81Na3, 81Ba2, 81Kal, 81Ka2, 81N3, 81N21, 81A23, 81AL88.
2. Effect of grass control on animal production trials. 81M01, 82Na29.
3. Effect of grass control on take-all trials. 82LG25, 82Na30.
4. Effect of pasture density and composition on soil nitrogen trials. 81A24, 82Na5, 82WH32.
5. Grass control on rotations trials. 82E35, 79E15.
6. Grass control in re-seeded clover pastures trials. 82N16, 82WH26
The effect of chemical grass control in pastures on subsequent crop production and take all levels
To evaluate the effect of chemical grass control, 82LG25.
Introduction. Methods. General notes on the trials. Results and discussion. Conclusions
Pasture research programme for the medium rainfall zone of WA
Field Assistants: I.R. Rose S.P. Davis Soil Analysis: I.A. Pritchard. A. Screening trials M. polymorpha var brevispina. M. truncatula. T. cherleri - 84KA41, 84KA42, 84KA43, 84KA47. B. Large scale M. polymorpha evaluation - 84KA38, 84KA39, 84KA40, C. Long term Medic species evaluation - 82KA44, 82KA45. D. Species characterization trials - 83KA66, 83KA67. E. M. murex evaluation - 83KA45. F. Dwalganup replacement subclovers - 83KA69. Since 1981, the major emphasis of the Katanning pasture programme has been to select pasture species suitable for replacing ryegrass on soils where Annual Ryegrass Toxicity (ARGT) has been a major problem. These soils have traditionally been the hardsetting sandy loam soils of acid to alkaline reaction trend. Subterranean clover has failed to persist in these areas due to problems of burr burial, transient waterlogging and a lack of hardseededness.
Screening work to date has successfully identified the species Medicago polymorpha var brevispina to be a suitable alternative to ryegrass and as such, a considerable proportion of resources were directed into a more detailed evaluation of the species
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