Breedcow Lite assumptions - Revision history

Breedcowadmin: /* Detailed assumptions */

2025-07-31T23:41:34Z

Detailed assumptions

Breedcowadmin: /* Breedcow Lite assumptions */

2025-07-31T23:39:27Z

Breedcow Lite assumptions

Breedcowadmin: /* Detailed assumptions */

2025-07-31T23:37:32Z

Detailed assumptions

Breedcowadmin: /* Detailed assumptions */

2025-07-31T23:33:07Z

Detailed assumptions

Breedcowadmin: /* Gross Margins */

2025-07-10T03:21:45Z

Gross Margins

Breedcowadmin: /* Detailed assumptions */

2025-07-10T03:15:39Z

Detailed assumptions

Breedcowadmin: /* Detailed assumptions */

2025-07-04T02:08:39Z

Detailed assumptions

Breedcowadmin: /* Detailed assumptions */

2025-07-04T02:07:46Z

Detailed assumptions

Breedcowadmin: /* Detailed assumptions */

2025-07-04T02:07:18Z

Detailed assumptions

Breedcowadmin: Breedcowadmin moved page Breedcow+ Lite assumptions to Breedcow Lite assumptions

2025-06-13T01:28:16Z

Breedcowadmin moved page Breedcow+ Lite assumptions to Breedcow Lite assumptions

@@ Line 34: / Line 34: @@
 Peak calving month is assumed to be December, and all sales occur in June. This may not always happen in reality, but was chosen as that is when pasture production usually slows.
 As steers approach maturity, their rate of weight gain slows.
-% of weight gain occurs between January and May on the basis of this representing the wet season for most areas.
+% of weight gain occurs between January and May on the basis of this representing the wet season for most areas (80% in lower productivity zones).
 The weight of cows and bulls is proportional to the average liveweight gain, as is the rate of average daily gain for calves from birth to weaning.

@@ Line 1: / Line 1: @@
 == Breedcow Lite assumptions ==
 ===The concepts underpinning Breedcow+ in general===
@@ Line 6: / Line 10: @@
 '''Please note''' that all herd numbers in the Breedcow+ program are calculated to full precision, but displayed as integers (they are not rounded to the nearest whole number although they show on the screen as whole numbers). This level of precision is needed to achieve a balance in stable state but can cause rounding errors in the display. For example, a worksheet may show 113 steers aged three years when a calculation based on whole numbers may only indicate 112.
 ----

@@ Line 40: / Line 40: @@
 Sale weights for weaner heifers and steers have been taken from the respective Growth Path entries (rather than averaged across the sexes which is the normal default).
 Weight loss to sale is 6%, with transport costs of $2.5/deck/km travelling 350km, with an automated entry for number of head per deck (approximately 10,500 kg/deck).
-Heifers and steers up to 2.5 years (or 450 kg) go to the saleyards, incurring a 4% commission and $17/head for other selling costs. Everything else has 0% commission and $5/head other costs.
+Heifers and steers up to 2.5 years (or 500 kg) go to the saleyards, incurring a 4% commission and $17/head for other selling costs. Everything else is abattoir bound with 0% commission and $5/head other costs.
 Prices per kg have premiums or discounts for each age bracket and sex, with weaner steers attracting the highest premiums of 20% and old cull cows (10+) and bulls getting the biggest discount (proportionally more in low growth scenarios) (up to 30%).
 *'''Huscosts'''
-Weaners and bulls are assumed to be vaccinated and fed, breeders are pregnancy tested, and low liveweight gain scenarios have a dry season supplement cost provision (starting from liveweight gain scenarios under 139 kg/hd/yr and peaking when under 100 kg/hd/yr). However, these just affect the relative distribution of costs, as the inputted figure will equalise out.
+Weaners and bulls are assumed to be vaccinated and fed, breeders are pregnancy tested, and low liveweight gain scenarios have a dry season supplement cost provision (starting from liveweight gain scenarios under 140 kg/hd/yr and peaking when under 100 kg/hd/yr). However, these just affect the relative distribution of costs, as the inputted figure will equalise out.
 Wet season supplementary Phosphate is a separate entry as it is fed to cattle that are being sold (and kept) and would otherwise affect the distribution mentioned above. All heifers and steers get 100% of the cost per head nominated, bulls get 150% and weaners get 50%.

@@ Line 40: / Line 40: @@
 Sale weights for weaner heifers and steers have been taken from the respective Growth Path entries (rather than averaged across the sexes which is the normal default).
 Weight loss to sale is 6%, with transport costs of $2.5/deck/km travelling 350km, with an automated entry for number of head per deck (approximately 10,500 kg/deck).
-Heifers and steers up to 2.5 years go to the saleyards, incurring a 4% commission and $17/head for other selling costs. Everything else has 0% commission and $5/head other costs.
+Heifers and steers up to 2.5 years (or 450 kg) go to the saleyards, incurring a 4% commission and $17/head for other selling costs. Everything else has 0% commission and $5/head other costs.
-Prices per kg have premiums or discounts for each ae bracket and sex, with weaner steers attracting the highest premiums of 20% and old (10+) cull cows and bulls getting the biggest discount (especially in low growth scenarios) (up to 30%).
+Prices per kg have premiums or discounts for each age bracket and sex, with weaner steers attracting the highest premiums of 20% and old cull cows (10+) and bulls getting the biggest discount (proportionally more in low growth scenarios) (up to 30%).
 *'''Huscosts'''

@@ Line 71: / Line 71: @@
 ----
-===Gross Margins===
+===Gross Margins (copied from Breedcow+)===
 '''Gross margins are used in the Breedcow+ program to compare turnoff or husbandry strategies that use the same resources and therefore incur the same fixed costs.''' The difference in the herd gross margin will therefore be the same as the difference in net income when two or more options are compared. We use the gross margin because it is simpler to determine the costs and the outcome is the same.

@@ Line 46: / Line 46: @@
 *'''Huscosts'''
 Weaners and bulls are assumed to be vaccinated and fed, breeders are pregnancy tested, and low liveweight gain scenarios have a dry season supplement cost provision (starting from liveweight gain scenarios under 139 kg/hd/yr and peaking when under 100 kg/hd/yr). However, these just affect the relative distribution of costs, as the inputted figure will equalise out.
-Wet season supplementary Phosphate is a separate entry as it is fed to cattle that are being sold (and kept), and would otherwise affect the distribution mentioned above. All heifers and steers get 100% of the cost per head nominated, bulls get 150% and weaners get 50%.
+Wet season supplementary Phosphate is a separate entry as it is fed to cattle that are being sold (and kept) and would otherwise affect the distribution mentioned above. All heifers and steers get 100% of the cost per head nominated, bulls get 150% and weaners get 50%.
 ''Huscosts presentation in Breedcow+''
-Note this may look slightly confusing. The initial entries are inputted to ensure there is an approximate cover for a variety of operations. These are then added to get a total, and zeroed. What this has achieved is to calculate a '''proportion''' that can be attributed to each cattle class (for example, we know steers that are sold have much lower costs than weaners). Then whatever cost per head is chosen in Lite, the relative proportion is applied to this cost for each class.
+Note this may look slightly confusing. The initial entries are inputted to ensure there is an approximate cover for a variety of operations. These are then combined in a formula to calculate a '''proportion''' that can be attributed to each cattle class (for example, we know steers that are sold have much lower costs than weaners). Then whatever cost per head is chosen in Lite, the relative proportion is applied to this cost for each class. The '''Balancer''' item shows by how much the chosen figure in Lite needs to change in Breedcow+ after the standard / pre-filled costs are included.
 *'''Breedcow: Section A'''

← Older revision		Revision as of 02:07, 4 July 2025
Line 49:		Line 49:

	''Huscosts presentation in Breedcow+''		''Huscosts presentation in Breedcow+''
		+
	Note this may look slightly confusing. The initial entries are added in to ensure there is an approximate cover for a variety of operations. These are then added to get a total, and zeroed. What this has achieved is to calculate a '''proportion''' that can be attributed to each cattle class (for example, we know steers that are sold have much lower costs than weaners). Then whatever cost per head is chosen in Lite, the relative proportion is applied to this cost for each class.		Note this may look slightly confusing. The initial entries are added in to ensure there is an approximate cover for a variety of operations. These are then added to get a total, and zeroed. What this has achieved is to calculate a '''proportion''' that can be attributed to each cattle class (for example, we know steers that are sold have much lower costs than weaners). Then whatever cost per head is chosen in Lite, the relative proportion is applied to this cost for each class.

← Older revision	Revision as of 01:28, 13 June 2025
(No difference)