Individual trial data - depth of lime incorporation

Trial number 86NA42 Location Wagin Trial number 86KA60 Location Katannin

Influence of soil acidity on cereals and acidification rates.

Soil acidity and the availability of nitrogen to cereals. To determine the extra nitrogen available due to better pasture legume growth after liming.To determine the extra nitrogen released from soil organic matter after liming. Trial 89NO81 Location: South Cunderdin. Trial 89NO82 Location: Cunderdin Trial 89NO83 Location: Konnongorring. Trial 89NO84 Location: Jennacubbine. Trial 88AL35 Location: Woogenellup. Trial 88TS54 Location: Three Springs. Trial 88NO76 Location: Goomalling. Trial 88NO77 Location: Ejanding

Soil acidity survey. Lime responses in the central wheatbelt

Introduction: In 1984 a project commenced to examine the influence of soil acidity on barley production in the main barley growing areas of Western Australia. To carry out some of the projects objectives a soil survey was carried out. Aims: 1. To select nine sites for liming trials in 1985. 2. To obtain more information about the soil acidity problem in the medium rainfall region of W.A. 3. To determine if there is a relationship between the pH and aluminium content of the soil. Survey details: Area covered - Katanning and Narrogin District Office (DO) areas. Sampling period - Mid August to mid October, 1984. Method - The sites were chosen by using the CSBP data base. Paddocks which had a pH (in water) below 5.5 were selected as being possible sites for liming trials. Lime responses in the central wheatbelt - 83NO45 - Beverley, 83NO46 - York

Influence of soil acidity on barley production.

A soil survey of 38 sites in barley growing areas of Western Australia was carried out in 1984. It was found that 53% of topsoils surveyed had a pH less than 5.5, acid enough to suspect barley yields might be affected. In 1985 an extensive field trial proqramme was established at 9 sites. The sites were selected from the 1984 survey and they varied in their level of acidity from mild to severe. 85NA, 85NA2, 85NA5, 85NA4, 85NA3, 85KA3, 85KA4, 85KA5, 85KA6, 83N046

Barley production and soil acidity

One of the causes of reduced plant yields on acid soils is aluminium toxicity. because barley is extremely sensitive to this mineral, a project started last year to examine the influence of soil acidity on barley production in the main barley growing areas of Western Australia. This article discusses some of the background information on the project and its aims

Estimates of Soil Solution Ionic Strength and the Determination of pH in West Australian Soils

The average ionic strength of 20 West Australian soils was found to be 0.0048. The effects of three electrolytes (deionized water, CaCl2 and KNO3), three ionic strengths (0.03, 0.005 and soil ionic strength at field capacity, Is) and two soil liquid ratios (1:5 and 1:10) on the pH of 15 soils were investigated. pH measurements in solutions of ionic strength 0.005 differed the least from measurements made at Is. The differences that occurred in comparisons with distilled water or CaCl2 of ionic strength 0.03 (0.01 M) were much greater (≥0.4 pH units). An extractant with an ionic strength of 0.005 may provide a more realistic measure of pH in the field than distilled water or 0.01 M CaCl2 for West Australian soils

Individual trial data.

Responses to species of lime. 87NA91 87A137 87KA7

ADOPT: a tool for predicting adoption of agricultural innovations

A wealth of evidence exists about the adoption of new practices and technologies in agriculture but there does not appear to have been any attempt to simplify this vast body of research knowledge into a model to make quantitative predictions across a broad range of contexts. This is despite increasing demand from research, development and extension agencies for estimates of likely extent of adoption and the likely timeframes for project impacts. This paper reports on the reasoning underpinning the development of ADOPT (Adoption and Diffusion Outcome Prediction Tool). The tool has been designed to: 1) predict an innovation‘s likely peak extent of adoption and likely time for reaching that peak; 2) encourage users to consider the influence of a structured set of factors affecting adoption; and 3) engage R, D & E managers and practitioners by making adoptability knowledge and considerations more transparent and understandable. The tool is structured around four aspects of adoption: 1) characteristics of the innovation, 2) characteristics of the population, 3) actual advantage of using the innovation, and 4) learning of the actual advantage of the innovation. The conceptual framework used for developing ADOPT is described.Adoption, Diffusion, Prediction, Research and Development/Tech Change/Emerging Technologies,

The effect of soil acidity on barley

Three liming experiments were established to confirm previous estimates of the critical soil acidity level for barley. Two experiments studying the effect of depth of incorporation on the effectiveness of lime, established in 1986, were continued in 1987. The results from the three liming experiments established this year supported the conclusion that barley is affected by soil acidity at pH\u27s around 4.2 and 4.3 (CaC12) and that depth of this acid layer is important.Significant lime responses were obtained at the Katanning depth of lime incorporation site but conclusions can not be made because of possible mixing of acid and less acid layers further down the profile at the deeper depths of incorporation.87NA91, 87AL37, 87KA77, 86NA42, 86KA6