Previous changes of TAL for Windows

Changes in ver. 3.0b - Feb. 01

• Bug fixed in Range Lookup: Silt class was mis-specified in the USDA and Canadian schemes. This has been fixed.
• Bug fixed in Point Lookup: Sand values were mistakenly taken as silt values, and vice versa.

Changes in ver. 3.0a - Feb. 01

• Bug fixed in Range Lookup: Two texture classes (sandy loam and silt loam) were mis-specified in the USDA and Canadian schemes. This has been fixed.

Changes in ver. 3.0 - Feb. 01

This is a major version release. The following are the changes:

• "TAL Calculator" is now called "TAL for Windows".
• New feature: Range Lookup is a feature whereby for given a particle-size distribution range, TAL can list all texture classes within that range. For example, in the USDA scheme, TAL reports the following texture classes for 30-50% clay and 10-30% sand: "clay, silty clay, silty clay loam, and clay loam".
• New feature: TAL can now handle large data sets up to 1000 soil samples.
• New feature: Added file saving and loading capabilities.
• User interface completely changed. A major change is that data entry and output in TAL now mimics spreadsheet cells as found in Excel and Lotus 123.
• Users no longer need to set any options (such as default soil schemes) manually; options are saved automatically based on last used settings.
• Corrected some errors in the help file.

Changes in ver. 2.8 - Nov, 1999

• International soil classification scheme added. TAL Calculator now supports 4 classification schemes.

Changes in ver. 2.71 - Feb, 1999

• Bug fixed: Clay loam texture class was mis-specified in the UK classification scheme. This was corrected.
• Users can no longer choose another location for the help file. TAL Calculator's help file should not be moved from its original location.
• The positions of silt and sand input boxes were swapped.

Changes in ver. 2.7 - Nov, 1998

• Added 2 soil classification schemes: UK (England and Wales) and Canadian soil schemes. TAL Calculator now supports 3 classification schemes, including the USDA scheme.
• User interface is modified and enhanced to accommodate the additional classification schemes. The main change is its expanding/shrinking dialog box to reveal/hide the soil classification types.
• Greater ability for user customisations. Users can specify the default soil classification scheme to always use; to specify which particle size to always omit; and to specify the help file location.
• Improved uninstalling capabilities.

Changes in v2.01b - Oct, 1998

• Bug fixed: TAL Calculator may give erroneous result when a particle size distribution lies exactly at certain boundaries of 2 or more USDA texture classes. Ver. 2.01b now conforms completely to the USDA scheme.

Changes in ver. 2.01 - Oct, 1998

• Bug fixed: help file location is now stored in Windows' Registry so TAL can always locate the help file.
• Minor changes to the user interface: user interface is now slightly smaller and some rearrangements of buttons

Changes in ver. 2.0 - Oct, 1998

• The user interface is smaller, easier to use, and more compact.
• TAL Calculator always stays on top of all windows. Bugs fixed: in version 1.0, entering exactly 0.0 (or just 0) yields an error message that you must enter a value between 0 and 100. There were also a few problems with how the help file is displayed in version 1.0. All these problems have been fixed.
• No longer supported: if the sum of particle sizes is not exactly 100%, texture class lookup will fail. In version 1.0, the Calculator will give all possible matches for its texture class. I decided to remove this feature because this kind of data is erroneous anyway.
• Buttons now look more cool with graphics instead of just text.
• Support for tooltips. Just hover the mouse pointer over a control (check box or button), instructions appear on what the control is.