(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
 SlideRule Senior Member Posts: 1,487 Joined: Dec 2013
(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:

BEST!
SlideRule
04-18-2024, 08:03 PM
Post: #2
 Thomas Klemm Senior Member Posts: 2,104 Joined: Dec 2013
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

References
04-18-2024, 09:52 PM
Post: #3
 SlideRule Senior Member Posts: 1,487 Joined: Dec 2013
RE: (32S) Determination of Dry Matter in small silage samples
Thank you for the kind note & the technical review; much appreciated by all!

BEST!
SlideRule
 « Next Oldest | Next Newest »

User(s) browsing this thread: 1 Guest(s)