Advanced Mathematics in Growing Indoors

GreenhouseGreen

GreenhouseGreen

Well-Known Member
A refrigerant ton is the rate of heat transfer required to melt a one ton block of ice stored at freezing temp in 24 hours. It's about equal to 12k BTUs or 3.5KW.

Also, 42.
 
Dr.Amber Trichome

Dr.Amber Trichome

Well-Known Member
:D
Knowing and calculating your yield not only allows you to track your progress as a grower and set personal benchmarks, it will allow you to better evaluate efficiencies, make adjustments to increase yield and compare your grow operation to others in the industry. To do that, though, everyone needs to be measuring their yield the same way. Here are some common, and not as common, yield formulas:
1 Grams of dried product/square foot of canopy:
The industry benchmark, this formula allows you to get the most basic measure of your yield. Your square footage is simply the length of your canopy coverage multiplied by its width. Divide your total dried product weight by the square footage, and you will get your yield per square foot.
Formula: Total dried product weight ÷ Square footage of canopy = Yield per square foot
The bigger the number, the better the yield. It’s not the most accurate measure, as it doesn’t account for cycles per year – someone could have a tremendous yield/sq. ft., but if they are only turning two cycles/year, they are likely not producing as much as someone with a lower yield/sq. ft. who turns six cycles/year. Still, it is the most commonly used measure to compare crop yields. (72% of research participants indicated that they measure yield per square foot.)
2 Grams of dried product/cubic foot of canopy:
To calculate your canopy in cubic feet, simply multiply your square footage (from metric #1 above) by your canopy height. To calculate your yield, divide your total grams of dried product by your cubic footage.
Formula: Total dried product weight ÷ Cubic footage of canopy = Yield per cubic foot
This formula takes into consideration canopy height, which can greatly impact results compared to calculating yield with square footage only, especially if you are cultivating using vertical farming.
3 Grams of dried product/watt of light:
This formula allows you to calculate your yield relative to your total light power. To calculate, simply divide your dry weight by your lamp wattage.
Formula: Total dried product weight ÷ Total lamp wattage = Yield per watt of light
For example, if you’re using two 600W lamps (1200W total) and produced 1,020 grams of dry product, your calculation would be 1020g/1200W = 0.85g/W.
This formula allows you to measure your yield relative to your lamp strength, and can account for energy efficiency (or inefficiency) for different lighting sources. For example, if you’re using “energy efficient” LEDs that produce low yield, they are not actually efficient.
4 Grams of dried product/kilowatt-hour:
This is the industry standard measure that allows you to calculate your energy costs over your yield. To do this, you first need to calculate your daily energy usage: Multiply your total wattage by the number of light operating hours in a day.
Formula for total daily energy usage: Total light wattage x light operating hours per day = Total wattage hours
For example, if you’re using two 600W lamps on a daily, 12-hour cycle, your daily energy use will be 1200W x 12hours = 14,400 watt hours (Wh).
Divide that by 1,000 (since 1,000W equals 1kW) to get your kilowatt hours (kWh) per day.
Formula for kilowatt hours: Watt hours ÷ 1,000 = kWh
Then, multiply your kilowatt hours per day by the number of days your canopy has spent under lights.
Formula for kWh/cycle: kWh per day x number of days under lights = kWh/cycle
For example, using the above figures of 14,400Wh, or 14.4kWh, and if your cycle is 75 days, your formula would be: 14.4kWh x 75 days = 1080kWh used during your entire cycle.
Next, divide your yield in grams by your total kWh.
Formula for yield/kWh: Total dried product weight ÷ kWh/cycle = Yield per kWh This measure will allow you to easily compare your yield relative to your energy costs, making it a useful tool to compare various lighting systems.
 
OldMedUser

OldMedUser

Well-Known Member
I'm not competitive enough to need to keep score but it seems to be important to a lot of growers so thanks to your post @Dr.Amber Trichome they will be able to figure it all out.

I see a lot of posts about fantastic yields showing plants I know to be half if not less in actual dry bud weight just by looking at them. I swear some are using wet wt. as their yields. I trim my buds fresh off the plant even taking out all the tiny bud leaves and have compared wet to dry and came up with a multiplier to closely estimate my dry yields at 23.5% of the wet wt.. Just multiply your wet wt. by 0.235. If all the sugar leaves are left on then that number is a bit lower.

My numbers are always going to seem lower as I'm only taking finished bud wt. as my final yield but all that frosty sugar trim can be half the wt. of the bud so would inflate my numbers if left on the bud. The wt. that matter to me are how much oil/keif do I get out of each oz as the majority of my bud ends up as oil. I hate trimming thanks to having very painful arthritis in my hands plus it's just a PITA. :)

:peace:
 
Dr.Amber Trichome

Dr.Amber Trichome

Well-Known Member
OldMedUser said:
I'm not competitive enough to need to keep score but it seems to be important to a lot of growers so thanks to your post @Dr.Amber Trichome they will be able to figure it all out.

I see a lot of posts about fantastic yields showing plants I know to be half if not less in actual dry bud weight just by looking at them. I swear some are using wet wt. as their yields. I trim my buds fresh off the plant even taking out all the tiny bud leaves and have compared wet to dry and came up with a multiplier to closely estimate my dry yields at 23.5% of the wet wt.. Just multiply your wet wt. by 0.235. If all the sugar leaves are left on then that number is a bit lower.

My numbers are always going to seem lower as I'm only taking finished bud wt. as my final yield but all that frosty sugar trim can be half the wt. of the bud so would inflate my numbers if left on the bud. The wt. that matter to me are how much oil/keif do I get out of each oz as the majority of my bud ends up as oil. I hate trimming thanks to having very painful arthritis in my hands plus it's just a PITA. :)

:peace:
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I know this grower in here that has it all down . He switched from growing monsters to like 24 autos . So his turn around is faster. He used to grow monsters and take 4 to 5 months to finish and now he can turn over more plants from seed to harvest in 10 weeks and produce more bud. He did the calculations with plant time and growth speed. That takes advanced math skills that I don’t see a lot. I also see an advantage to growing different strains and finding the stars faster and just seems more interesting if you want variety and switch up the pace .
 
OldMedUser

OldMedUser

Well-Known Member
Dr.Amber Trichome said:
I know this grower in here that has it all down . He switched from growing monsters to like 24 autos . So his turn around is faster. He used to grow monsters and take 4 to 5 months to finish and now he can turn over more plants from seed to harvest in 10 weeks and produce more bud. He did the calculations with plant time and growth speed. That takes advanced math skills that I don’t see a lot. I also see an advantage to growing different strains and finding the stars faster and just seems more interesting if you want variety and switch up the pace .
Click to expand...
If I were running a grow business I'd likely want to track my best yields but my main interest in pot is it's medicinal value so if the right strain doesn't yield lots I just grow more of them if I need to. I've done all the advanced mathematics getting a diploma in chemistry in my 30s as I care to all the way up to and including first level calculus. I barely squeaked thru calculus but squeak I did with a little help from a friend and a teacher's strike during that term. :D

:peace:
 
PadawanWarrior

PadawanWarrior

Well-Known Member
OldMedUser said:
If I were running a grow business I'd likely want to track my best yields but my main interest in pot is it's medicinal value so if the right strain doesn't yield lots I just grow more of them if I need to. I've done all the advanced mathematics getting a diploma in chemistry in my 30s as I care to all the way up to and including first level calculus. I barely squeaked thru calculus but squeak I did with a little help from a friend and a teacher's strike during that term. :D

:peace:
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What's the limit of 1/x as x approaches 0?
 
OldMedUser

OldMedUser

Well-Known Member
PadawanWarrior said:
Limits were fun huh, :lol:.
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Sure if you're a masochist. :) I was 33 when I went back and had to take a math upgrade course before classes started. Grades 9. 10, 11 and 12 math in 6 weeks. 84% average so got honors in that.

I thought jeez that was a piece of cake so classes can't be that tough. OMFG! Total lack of time management skills and my first ever computer almost flunked me out the first term. Commuting from the Fraser Valley into Burnaby every day ate up a lot of time so got a residence for the rest of my 3 years there. Wife and baby boys at home was a big distraction too so for mid-terms and finals I wouldn't go home a lot of weekends.

Physics had most of the hardest math and there was 2 terms of that first year. Started treating those huge equations like puzzles and really got good at advanced algebra. Truthfully I basically cheated my way thru calculus. With the teacher's strike we got assignments to do at home and my buddy Charlie was a wiz with that shit so did his and handed me his work to copy with a few errors here and there so it wouldn't be spotted.

Had a 1 term course on computer math and aced teh fuck out of that. Out of 4 exams I got 1 - 100s and the other two high 90s. Still think I should have taken computer science instead but had no idea about courses. When I was 17 I wanted to get chem and make drugs then die rich so when I decided to go back to school just did chem. Would have got richer with the computer stuff instead I bet.

Still don't have a high school diploma. 13 of us were in as mature students when it started with a class of 51 and I was by far the oldest. I was the only mature student to graduate. The first year I hooked up with a couple stoner dudes in my class, Charlie and Dave, and as we all had the same courses the 1st year we went to the library right after school and did all our homework together then found someplace to blaze and play crib for a while. Once I got rez we just went there every day. Always had a smoking room so close the door and stuff a towel along the bottom, open the windows and blaze away after the books were closed then break out the crib board and play for a couple hours.

The wife and I were basically together for the kids so she didn't care if I came home at all and I never slept alone if I didn't want to. Not long after getting done we split then she went back east and left me the kids. Has never been back.

:peace:
 
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