Integrals of Motion for Critical Dense Polymers and Symplectic Fermions

We consider critical dense polymers ${\cal L}(1,2)$. We obtain for this model the eigenvalues of the local integrals of motion of the underlying Conformal Field Theory by means of Thermodynamic Bethe Ansatz. We give a detailed description of the relation between this model and Symplectic Fermions including the indecomposable structure of the transfer matrix. Integrals of motion are defined directly on the lattice in terms of the Temperley Lieb Algebra and their eigenvalues are obtained and expressed as an infinite sum of the eigenvalues of the continuum integrals of motion. An elegant decomposition of the transfer matrix in terms of a finite number of lattice integrals of motion is obtained thus providing a reason for their introduction.Comment: 53 pages, version accepted for publishing on JSTA

Palladium, platinum, and gold distribution in serpentinite seamounts in the Mariana and Izu-Bonin forearcs: evidence from Leg 125 fluids and serpentinites

Palladium, platinum, and gold were analyzed for 20 interstitial water samples from Leg 125. No Pd or Pt was detected in fluids from serpentinite muds from Conical Seamount in the Mariana forearc, indicating that low-temperature seawater-peridotite interaction does not mobilize these elements into the serpentinizing fluids to levels above 0.10 parts per billion (ppb) in solution. However, Au may be mobilized in high pH solutions. In contrast, fluids from vitric-rich clays on the flanks of the Torishima Seamount in the Izu-Bonin forearc have Pd values of between 4.0 and 11.8 nmol/L, Pt values between 2.3 and 5.0 nmol/L and Au values between 126.9 and 1116.9 pmol/L. The precious metals are mobilized, and possibly adsorbed onto clay mineral surfaces, during diagenesis and burial of the volcanic-rich clays. Desorption during squeezing of the sediments may produce the enhanced precious metal concentrations in the analyzed fluids. The metals are mobilized in the fluids probably as neutral hydroxide, bisulfide, and ammonia complexes. Pt/Pd ratios are between 0.42 and 2.33, which is much lower than many of the potential sources for Pt and Pd but is consistent with the greater solubility of Pd compared with Pt in most natural low-temperature fluids

1975 Weed trials - annual ryegrass, spray top, broadleaved weeds in cereals, wild oats

Ryegrass in cereals - 75A24, 75E16, 75G16, 75LG5, 75N19, 75NO32. Spray top annual ryegrass trial - Locality - Wongan Hills, Merredin Research Station Avondale Research Station, Newdegate Research Station. Background - Killing of immature seed by killing seedhead with paraquat is a method of reducing seed production in annual ryegrass. Method Various rates of \u27Spray top\u27 were applied to an even stand of ryegrass. Seed counts were made in December 1975 and will be made in March 1976. Plant counts after emergence will be made as well. Counts were partitioned into seed in head and seed shed. Herbicide control of broad leafed weeds in cereals - 75A25, 75C19, 75M36. Herbicide control of wild oats in wheat - 75A23, 75KA22, 75T52

Weed research. 4. Growth stage in cereal crop spraying

EACH year some 450,000 acres of cereal crops in Western Australia are sprayed for the control of weeds. Of this area more than two-thirds is treated from the air. During the present season 32 aircraft will be engaged in the weed spraying programme. This means that the aerial spraying capacity this year will be approximately double last season\u27s operations

Summary research results 1979

DPX4189 for weed control in wheat 79N27. Location - Toodyay. Herbicide mixtures for broadleaved weeds in wheat. Location - Toodyay. Diuron mixtures for broad leaf weeds in cereals. Location - Glencoe C/- P.O. Bindoon. Herbicides for early planting 79MO42. Location – N. Tonkin – Coomberdale. Broad leaf weeds in cereals 79MO45. Location - Miling (J. Lewis, Plympton). Herbicides for early planting 79LG27. Location – Karlgarin

Weed Trials 1974 Summary - Annual ryegrass control - wild oats - cereal tolerance to 2,4-D - annual ryegrass toxicity

A herbicide trial and demonstration was commenced in 1973 and the treatment repeated in 1974. the objective was to control the annual ryegrass which was the dominant species and allow the scattered plants of sub clover to re-establish a clover dominant pasture. (See table) Despite the high reduction of seed stalks formed on some treatments in 1973 the ryegrass was only reduced by 50 per cent on the best treatment in 1974, The reduction in seed production in 1974 will no doubt further reduce the density of ryegrass in 1975 but eradication is unlikely. The value of burning in destroying viable seed, nematode galls and bacteria infected seeds can be summarised (See Table) Newdegate Research Station 74N14, Newdegate Research Station 74N15, Wongan Hills Research Station 74WH31, Merredin Research Station 64M15

Aerial spraying trial.

Conclusions 1. The volume of application with water affected the results obtained. The visual results of Treatment 1 suggested it was not an acceptable commercial result and the plant counts support this conclusion. Treatments 2 and 3 looked very similar and were very similar and were very acceptable results. 2. The height of spraying affected the results in that where the plane had to start climbing to pass over trees, the effectiveness dropped off. 3. Spray drift could be a problem because of the risk of causing damage to trees and native vegetation. Severe damage was seen on trees at the end of the plots at Toodyay. However this effect also occurs with ground spraying operations. The greater risk with aircraft is due to the fact that the plane is actually flying over the trees whereas a ground spray drives around them. District office trial. 81M043 (A), 81M03 (B), 81M043 (C), 81M054, 80M050, Comments: At the first time of spraying, both the Glean treatment and diuron 350 MCPA 400 killed all radish plants. There was a substantial later germination of radish, but the wheat in the diuron 350 MCPA 400 treatment suppressed radish growth. Both Glean treatments severely retarded wheat growth and allowed germinating radish plants to develop and set seed. The Glean affected wheat recovered, but still appeared less vigourous than the other treatments at the dough stage. At the second time of spraying, both treatments failed to control the radish. The failure is attributed to showery conditions on the day of application, as better control was achieved using the same chemical mixes at tillering. At both the second and the third time of spraying, the effectiveness of the diuron mixes is directly related to the hormone concentration in the mix. At the third time of spraying, the ester and the amine treatment killed the radish, but both treatments took a month until all plants died. Visually, the first time of spraying would have given the best yield. The trial was not harvested, because of a patchy ryegrass infestation. Moora district office trial. 81KA57, Glean compatibility trial. Barrel herbicide trial. Hoegrass plus flowable linuron. 81M57 (B), Dicamba residual trial. 81A58 There was no obvious signs of damage in the various planting date, like there was in the 1980 trial. The size of the doublegee in the oats and barley nil plots was very large and provided stron

Summary of weed trials 1975

Chemical ploughing herbicides trial 1976.- 76A25, 76WH98. Sowing systems preliminary trial (1) 1976. Location - M Brown - Narrogin N, T Kettle - Kendenup K, J Ericson - Bolgart B. Sowing systems preliminary trial (2) 1976. Location - A DeRusso Hyden, Esperance Research Station. Herbicides for wild oat control district office demonstration trial. Location - Katanning, Moora, Northam. Wheat tolerance - herbicides 1976. Location - Wongan Hills Research Station - 76WH100. New herbicides for broadleaved weeds. Location - Ron Adams Beverly Experiment - 76A24

The control of weeds in lawns

During the summer, a fast-growing lawn with a deep green colour can usually be produced fairly easily by regular applications of nitrogenous fertilisers. Such a lawn should require mowing every seven to ten days, and thus little opportunity is given to new weeds to establish themselves. In fact during this time of the year, there are few annual weeds apart from crab grass which are a problem in home lawns or playing fields in this State, while perennial weeds are limited to white clover and flatweed

Weed control in vineyards

CHEMICAL weed control trials commenced last year are so promising that it may be possible to do away with the practice of strip-digging in vineyards. Satisfactory weed control which will last throughout the winter and spring can be obtained with chemicals. However, further information is required concerning possible damage to the vines through a build-up of the chemicals in the soil