Wet feed
Content
1Configuration (wet feed)
1.1General options
1.2Specification (wet feed)
1.3General parameters in Libra 5 (Options Category Session)
1.3.1Reference nutrient
1.3.2Session formula prices
1.3.3Rounded formula prices
1.4Relation between configuration raw materials and matrix values
1.5Price lists (wet feed)
2Session(wet feed)
2.1Extra columns
2.2Optimise kernel or complete feed (wet feed)
2.3Minimal uptakes, consumptions and tonnages (wet feed)
2.4Type constraints (wet feed)
2.5Modify matrix values in the session (wet feed)
2.6Value of dry matter and wet on dry matter equivalent (wet feed)
2.7Price management (wet feed)
2.8Prices on reference nutrient (wet feed)
3Import/export prices of raw materials (wet feed)
4Creation of a specification for the kernel (wet feed)
1Configuration (wet feed)
1.1General options
The setups for the wet feed still have to be set in the Options 4.7:
Extra Options Category WET
1.2Specification (wet feed)
Specification: to indicate that a specification is a wet food, it suffices to activate the option “wet feed”.
For the raw materials there are 4 options that determine how the constraints are shown. The default option has a different meaning depending on whether it involves a wet food or not; wet food = on dry matter, no wet food= on fresh weight.
There are 5 available types of constraints for the nutrients. For the wet feed default is= on standard dry matter equivalent, for the other default= on fresh product.
A reference nutrient for the calculation of the constraints on the reference nutrient is adjustable at the specification. If nothing was entered here then Libra uses the nutrient that has been entered in the general parameters (see further). If this type of constraint has been chosen then Libra automatically calculates the proportion between the value of the nutrient and of the reference nutrient. When for example a minimum has been given for a protein with the type of constraint “reference nutrient” and this is energy, Libra will automatically calculate the proportion protein/energy.
1.3General parameters in Libra 5 (Options Category Session)
1.3.1Reference nutrient
At this level you can determine the default reference nutrient.
It is also here that the default putting at the disposal of a number of columns as soon as a certain situation occurs can be adapted.
1.3.2Session formula prices
Session price (0,1,2,3): only applicable for wet feed (feed that contain at least one wet raw material).
The prices are only shown when the option ‘Detail formula: show prices at the top?’ is checked (to be found in the same category SE).
Attention: the prices on dry matter or reference nutrient in the headers of the columns remain unchanged on the basis of dry matter or reference nutrient (regardless of the number that has been filled in at this option).
Example:
Option ‘0’: formulaprices in relation to fresh weight (screen print of detail formula of a wet feed)
option ‘2’: formula prices in relation to dry matter
1.3.3Rounded formula prices
Rounded formula prices in session
Attention: all the prices of complete formulae are calculated on rounded complemented formula as from release 12. Because of this it might happen that slight differences are shown between the releases 11 and 12 of LIBRA.
1.4Relation between configuration raw materials and matrix values
Menu: Data Raw materials Modify or create
In this screen one indicates whether one is dealing with a wet or a regular raw material by checking or unchecking the option “Wet raw material”.
For a wet raw material the matrix values are always entered in relation to the dry matter. In case of normal raw materials the analyze values are entered in relation to the gross product.
In the example here one has a dry matter percentage of 57.6% and a rough protein of 19.76% in relation to the gross product. If one now indicates that this raw material is a wet raw material, the matrix values are converted to dry matter. In this matter this becomes 19.76/0.576 = 34.306.
One does receive a warning first if one modifies the option “wet raw material”.
1.5Price lists (wet feed)
Menu: Data Price lists modify or create.
A new column is available: “On dry matter?”. If necessary, adapt the profile in order to make this column visible.
One can distinguish 3 scenarios:
1)One adds a new raw material to the price list
For every newly added raw material one gives in a price, indicates whether this price expressed on the gross product or on the dry matter. If it is expressed on dry matter, one checks the option for the raw material involved.
The prices that are expressed in relation to the dry matter, are presented in cursive. These prices are saved the way they have been entered, there is never a conversion. The option at the bottom of the screen, “convert the price, if …” does not have an invluence on this entry.
2)One modifies the price as well as the option “on dry matter” without a conversion
One wants to modify a raw material price, with which the new, entered price is expressed on dry matter, while the old price was expressed on gross product. (or the other way around) One enters the new price and activates the option “on dry matter”. The price is immediately shown in cursive. The option at the bottom of the screen, “convert the price, if …” can NOT be checked!
The price is saved the way it is entered.
3)One wants to show an existing price on dry matter instead of on the gross product while modifying or not modifying this price
If one wants a price that is shown in relation to the gross product in relation to the dry matter, a conversion will have to be done. If one enters a modification of price and this price is expressed in relation to the gross product and if one wants to convert this price to a price in relation to the dry matter, one has to do the following:
-make sure that the option at the bottom of the screen “convert the price, if …;” is checked!
-Control if the right matrix is entered in the left part of the screen.
-Possibly modify the prices
-Modify the option “on dry matter” where one wishes a conversion.
The prices will immediately be converted on the basis of the degree of dry matter in the entered matrix.
The option “convert the price, if …” can also be turned on or off while modifying a price list. This modification immediately affects the subsequent modification of the option “on dry matter”.
In the example below this option has been turned on and subsequently the option “on dry matter” has been activated for a number of raw materials. The price is immediately converted on the basis of their value of dry matter in matrix 1 and are put in cursive.
Oats, for example, is converted as follows: 120/0.865 = 138.7283236 which is shown in the screen as 138.73.
2Session(wet feed)
2.1Extra columns
In the session there are extra columns available with the value on fresh product, on dry matter, on dry matter equivalent, on reference nutrient that allow the values relative to the constraints to be shown.
One column shows the values of the complete food according to the type that is defined for that raw material or nutrient. That column can consequently contain all kinds of values.
The message is to pay attention.
2.2Optimise kernel or complete feed (wet feed)
See description complements
2.3Minimal uptakes, consumptions and tonnages (wet feed)
The consumptions are always expressed in fresh weight and therefore not in dry matter.
The minimal uptake, consumptions (and tonnages) and the global constraints at Multiformulation and intercompany can apply to the entire formula or to the kernel.
The complete description is to be found at the description of the complementary feed.
2.4Constraint types (wet feed)
These additional columns are available as soon as the session contains at least one wet feed specification or a specification with a constraint on dry matter or on reference nutrient.
These additional columns are available as soon as the session contains at least one wet feed specification or a specification with a constrained on dry matter or on a reference nutrient. If not these columns can still be activated by way of the left panel of the control panel. Under “Constraint types” one can activate “wet/dry” and “implicit ratios”.
The lower and upper limit for the marginal costs is expressed on the same basis as the constraints themselves (on fresh product, on dry matter …).
2.5Modify matrix values in the session (wet feed)
If one modifies the value of the dry matter (or wet depending on the configuration), automatically the value of the degree of wet (dry matter) will be adapted as well.
In case of wet raw materials all nutrient values are automatically adapted after modifying the value of dry matter or the wet value. In the session, the matrix values are always expressed in relation to the complete product. In case of wet raw materials consequently there is a conversion of the values in relation to the dry matter in the matrix to the gross product values in the session.
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2.6Value of dry matter and wet on dry matter equivalent (wet feed)
Before release 16 of Libra the parts of wet and dry matter were always shown on fresh weight, irrespective of which column. In the columns with parts on dry matter equivalent, now the values are shown on this basis. The actual dry matter or wet value one can now only see in the columns on fresh weight.
2.7Price management (wet feed)
The prices in the session that are also expressed in relation to the dry matter, are printed in cursive. The prices that are expressed in relation to the dry matter in the price list, are also shown in that way in the session.
The price of the formula is always shown on the gross product. After the optimisation there is consequently a conversion of the prices for those raw materials for which the price is given in dry matter. For this conversion Libra uses the matrix of the session!
If one consequently loads another matrix, or modifies the dry matterdegree of a rawmaterial, the price of the formula will change as well.
If the prices of the wet raw materials are shown inrelation to the dry matter, the price that is used for optimisation will change as well if the dry matter degree is modified. After all, the prices of the formula as well as the raw material prices with which one optimises, are always in relation to the complete product.
If the prices of the wet raw materials are represented in relation to the complete product, these prices do not change.
The following available prices are also shown in the heading of ‘Detail formula’:
- Price on dry matter (complete)
- Price on dry matter (complementary)
- Price on dry matter equivalent
- Price on reference nutrient
- Price rounded formula
- Price comparison
2.8Prices on reference nutrient (wet feed)
The formula prices on the reference nutrient (f.e. EW) are now calculated by dividing the formula price on fresh weight by the value of the reference nutrient in the formula. In some cases, however, one wants to show prices for example per 100 EW. This is now possible by settinga multiplier by way of Extra Options, category SP “Specifications”:
All the prices in relation to the reference nutrient, on the screen as well as on the prints, are now multiplied with this factor:
3Import/export prices of raw materials (wet feed)
The raw material prices are always exported and imported in relation to the gross product.
If there is an importation on an already existent price list and the prices are expressed there in relation to the dry matter, there is a conversion during the import of the price for these raw materials that are presented in the pricelist in relation to the dry matter. The conversion happens on a basis of the matrix that is entered in the existent price list.
4Creation of a specification for the kernel (wet feed)
Also see the explation at the description of “complementary feed”.
Proportions of nutrients (raw materials), expressed in relation to the complete food, are not transferred as such to the specification of the kernel if there are external raw materials in the formula. Constraints are defined on the individual nutrients (raw materials) that are the nominator of the proportion. Herewith Libra supposes that the denominator has a constant value.
When constraints are expressed on dry matter, dry matter equivalent or reference nutrient then these are in principle also proportions. These constraints are converted in the same way as the proportions in regular formulae such as Ca/P when they apply to the complete food.
Attention: all converted constraints automatically become the type “on fresh weight” in the specification of the kernel.
Constraints expressed in relation to the kernel are taken over integrally, therefore also the type!
Elaboration according to the example on the screen print below
1)raw material constraints on complete food
- on fresh product
Constraints are shared by part kernel, here 50¨%: 3/50% = 6
- on dry matter (= default)
for example wheat feed (87 % DS) 25 % on dry matter:
Gross product wheat x DS% wheat/DS formula≤ 25
Gross product wheat ≤ 25 x DS% formula/ DS% wheat
Gross product wheat ≤ 25 x 53.409% / 87 % = 15.3475 on complete formula
Constraintwheat in specification on kernel: 15.3475 / 50 % (kernaandeel) = 30.695
2)nutrient constraints on complete food
- on fresh product
is identical to the calculation in case of a regular complementary formula: for example calcium avaib. Pig: 0.85% external raw material does not deliver anything of this nutrient, therefore everything comes from the kernel that is 50% of the complete food =>1.7 becomes constraint in kernel
- on dry matter
one can see this constraint as a proportion, of which is presumed that the denominator is constant.
Vb. natrium (Na): ≤ 0.5 on the dry matter, that is to say
Na in formule/DS formula≤ 0.5
Na in formula≤ 0.5 x DS formula(53.409%)
Na in formula≤ 0.267
External raw material provides 0.00892 x 50% shareformula= 0.00446
Na out of kernel ≤ 0.267 – 0.00446 = 0.26254
Kernel = 50 % => constraint in kernel: 0.26254/50 % = 0.525
- on standard dry matter equivalent (= default)
vb. Rough Protein (RP): ≤ 11.5 op dry matter equivalent (= 88%), that is to day
RE in formulax 88% / DS formula≤ 11.5
RE in formula≤ 11.5 x 53.409 %(DS formule) / 88% = 6.97958
External raw material provides 2.252 RE x 50 % partformula= 1.126
RE out of kernel ≤ 6.97958 – 1.126 = 5.853585
Kernel = 50 % => restriction in kernel: 5.853585 / 50 % = 11.7071
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