Post by 48 on Aug 28, 2011 15:32:54 GMT -5
ks8780: It's not hard to estimate SB yields. It's real easy. Don't pay any attention to all the smart remarks.
You have to start with basic facts. 1A=43560 sq ft. On 10"R 1/1000A=52'- 3 1/4". But 52+ft is not reasonable to work with, so you use 1/10,000A=5'-2 3/4". Lay your tape measure out and pull up all the plants in 5'-2 3/4". This is your harvest population. Count the pods/plant. Pay attention to how many are 3 seed and 2 seed. The 2.5 seeds/pod that ECI gave you is just a rule of thumb. If you had mostly 3s/pod and some 4s/pod, you might use 3.5s/pod. Next pay attention to what the probable seed size is going to be at harvest. Standard seeds are 3000s/#. Big seeds are 2500s/#. Small seeds are 3500s/#. And, of course, there are 60#/bu.
You said you had a harvest stand of 115,000 plants/a. 1/10,000A=11.5 plants in 5'-2 3/4".
You said you had 40 pods/plant. 11.5plants x 40pods/plt=460pods.
You didn't say how many seeds/pod you had. But, if you use 2.5seeds/pod,
460pods x 2.5 seeds/pod=1150seeds.
Set/use your calculator to 6 decimal points.
If you think these are going to be standard size seeds, use 3000seeds/#.
1150seeds/3000s/#/60#/bu=.006389bu. But, this is for 1/10,000A.
.006389 x 10,000=63.89bu/a.
In summary, you have to look at all the variables like harvest plant pop, pods/plant, seeds/pod, likely harvestable seed size and seeds/#.
It takes years of experience to get good at this...just like it does with estimating corn yields. Keep good records when you harvest and make notes how to adjust in the future for better accuracy.
There is another way to do this. Study the Hail Insurance Adjustors Handbook. It's available on the internet:
"Soybean Loss Adjustment Standards Handbook"
www.rma.usda.gov/handbooks/25000/2010/25440.pdf
The crop insurance adjustor will tell you to leave 10' strips if you're going to tear it up before he can get there. There's a reason for that. All the tables are based on 10'. In actual practice, they do 5' and double it. Does that 5' look familiar? 1/10,000A on 10"R=5'-2 3/4".
You have to start with basic facts. 1A=43560 sq ft. On 10"R 1/1000A=52'- 3 1/4". But 52+ft is not reasonable to work with, so you use 1/10,000A=5'-2 3/4". Lay your tape measure out and pull up all the plants in 5'-2 3/4". This is your harvest population. Count the pods/plant. Pay attention to how many are 3 seed and 2 seed. The 2.5 seeds/pod that ECI gave you is just a rule of thumb. If you had mostly 3s/pod and some 4s/pod, you might use 3.5s/pod. Next pay attention to what the probable seed size is going to be at harvest. Standard seeds are 3000s/#. Big seeds are 2500s/#. Small seeds are 3500s/#. And, of course, there are 60#/bu.
You said you had a harvest stand of 115,000 plants/a. 1/10,000A=11.5 plants in 5'-2 3/4".
You said you had 40 pods/plant. 11.5plants x 40pods/plt=460pods.
You didn't say how many seeds/pod you had. But, if you use 2.5seeds/pod,
460pods x 2.5 seeds/pod=1150seeds.
Set/use your calculator to 6 decimal points.
If you think these are going to be standard size seeds, use 3000seeds/#.
1150seeds/3000s/#/60#/bu=.006389bu. But, this is for 1/10,000A.
.006389 x 10,000=63.89bu/a.
In summary, you have to look at all the variables like harvest plant pop, pods/plant, seeds/pod, likely harvestable seed size and seeds/#.
It takes years of experience to get good at this...just like it does with estimating corn yields. Keep good records when you harvest and make notes how to adjust in the future for better accuracy.
There is another way to do this. Study the Hail Insurance Adjustors Handbook. It's available on the internet:
"Soybean Loss Adjustment Standards Handbook"
www.rma.usda.gov/handbooks/25000/2010/25440.pdf
The crop insurance adjustor will tell you to leave 10' strips if you're going to tear it up before he can get there. There's a reason for that. All the tables are based on 10'. In actual practice, they do 5' and double it. Does that 5' look familiar? 1/10,000A on 10"R=5'-2 3/4".