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(32S) Determination of Dry Matter in small silage samples
04-16-2024, 07:31 PM (This post was last modified: 04-16-2024 07:34 PM by SlideRule.)
Post: #1
(32S) Determination of Dry Matter in small silage samples
An excerpt from Determination of Dry Matter in Small Silage Samples, Journal of the University of Wales Agricultural Society, 78, 101-114 (1988)

        INTRODUCTION AND METHODOLOGY
A previous paper (Faithfull, 1997) indicated that a suitable method for dry
matter determination in small silage cores had been developed; this paper
describes that method. …

        Calculation
… the volume of aqueous distillate is reduced by the volume of acid. This is estimated
according to the formula …
        Programmable calculator program
A program has been devised to allow easy calculation using a Hewlett-Packard
programmable calculator; this is shown in Figure 3.

        Figure 3. Silage Dry Matter Program for Hewlett-Packard HP 32SII
To write the program into the calculator, activate program-entry mode and start
at the top by typing: …

To run the program, enter the variables and store them. The variables are as
follows:


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04-18-2024, 08:03 PM
Post: #2
RE: (32S) Determination of Dry Matter in small silage samples
I really appreciate your posts of the use of HP calculators in published papers.
In this case however I noticed a few issues:
  • useless use of ENTER
  • division of the constant 0.00555 by 10
  • useless use of register B
  • use of constant 10 instead of register M

While the first three points are just a bit of annoyance, the last one on line 017 is really a bug.
You might enter a value different from 10 for \(m\) in register M and it will not be taken into consideration.

Here's a corrected and slightly optimised version of that program:
Code:
LBL W
1
RCL T
5.55E-4
×
-
RCL V
×
998
×
RCL M
÷
1E3
x<>y
-
RTN

Example

10 STO M
7.5 STO V
10 STO T
XEQ W

255.6542


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04-18-2024, 09:52 PM
Post: #3
RE: (32S) Determination of Dry Matter in small silage samples
Thank you for the kind note & the technical review; much appreciated by all!

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