I came across this video on youtube and it did make me think. Can this be true? whats your thoughts on this?
http://www.youtube.com/watch?v=7-yFtzDigVc
Scroggsy
http://www.youtube.com/watch?v=7-yFtzDigVc
Scroggsy
The Great Phosphorus Myth (whats your thoughts?)
- Thread starter Scroggsy
- Start date
Hoenhiem
Active Member
it is something to think about, but nutes and the consumption of them varies from strain to strain. but i think its highly unlikely that any grow from seed to harvest was done by the charts problem free. i think thats why you hear "listen to your plants" more than any other advice. simply what works for you with a certain strain my not necessarily work for me with the same strain. i prefer to have the knowledge of what all plants require throughout their life and adjust as needed. having the base knowledge is very necessary but having knowledge of how to dial it in and troubleshoot i think is more detrimental. just my opinion
Nobody else in the nutes industry seems to have tried to discredit what the guy says though. Even with an offer of $1M for successfully proving him wrong. Scroggsy.
He has had a 3rd party lab take tissue samples to test what nutrients the plants are using during both veg/flower stages of growth. Sounds convincing. You can see the results of those tests in PDF format below the video. Surely if these claims were untrue AN could possibly be taken to court over this video as he practically calls out to every nute manufacturer in the industry, claiming that they are not doing their jobs properly.
He has had a 3rd party lab take tissue samples to test what nutrients the plants are using during both veg/flower stages of growth. Sounds convincing. You can see the results of those tests in PDF format below the video. Surely if these claims were untrue AN could possibly be taken to court over this video as he practically calls out to every nute manufacturer in the industry, claiming that they are not doing their jobs properly.
Hoenhiem
Active Member
he does seem to have his research on point. and could possibly be correct. im in no way knowledgeable enough to say hes right or wrong. but i think with as long as the npk ratios have been used in horticulture it has to be dialed in such a way that it works. the same way that nute lines give a feeding schedule for their products knowing fully well that from strain to strain feeding differentiates its all in what works for each grower. he does have some info to make you think though. but the practicality of it all will be grow specific. from soil to hydro to cocoa to airoponics. since most grows are suitable for what the gardener wants i think so will the needs of their crops. good food for thought though.
greennewfie
Active Member
sounds interesting
He said tissue samples.
you are right...i dunno though man...why have people been growing for years loading their plants with the stuff, and having great results...i doubt that the yeild increase would outweigh potency...regardless of to much, better to have it then not? i think hes just complicating growing a weed...its hard enough, let alone expensive enough to get the perfect environment...let alone a perfected nutrient system. for veg, and flowering nonetheless
hhhmmm...wouldnt this guy be a pissed off grower to know that all the hard work testing MJ tissue was basically useless...
this is whats up: http://ipm.ncsu.edu/scouting_fraser_fir/sampling_soil.html
Where to take soil samples. Take soil cores from around 10 to 15 trees per acre. If plant tissue samples are taken, take soil cores from around the same trees. Take four cores per tree, varying the position of the core between the row, middles, and dripline.
Mix all cores from all locations in a bucket before placing a single sample in the soil sample box. Boxes and forms can be obtained from your local county center of the North Carolina Cooperative Extension Service.
When to take plant tissue samples. Tissue samples provide information on more nutrients than the soil samples. Comparing the soil samples with the plant tissue sample can show if the tree is taking up the nutrients. Take the first tissue sample when the trees have been in the field for 3 years. Take a second tissue sample when the trees are a year from market to help fine-tune fertility recommendations and to make certain that color and needle retention will be good at harvest.
Additional tissue samples should be taken to help diagnose the cause of color problems or poor growth in trees any time through the rotation or any time through the year. When diagnosing growth problems, always take two plant tissue samples -- one from the problem trees and a separate sample from good growing trees in the same block.
Time of year to take plant tissue samples. Tissue samples taken when the trees are dormant reflect nutrient levels most accurately. Nutrient levels in actively
growing tissue may vary considerably from the established standards. Therefore, avoid sampling from bud break until bud set. Samples taken during the active growth period should only be used for problem trees, and the results should be compared to samples taken at the same time from healthy trees.
How to take plant tissue samples. Sample from the same trees you have taken soil samples from. Plant tissue samples without a current soil sample are worthless. It is usually best to take samples from trees that are average in growth rather than from the best or the worst looking trees.
Take two shoots from the most current growth. Samples should be from the upper third of the tree. Try to sample shoots from a uniform position on branches such as a branch terminal. The laboratory will need at least 40 inches of growth to run their tests.
Local county extension agents can give you more information on taking soil and plant tissue samples and help you determine fertilizer needs from sample results. Your county agent can also help you take samples to diagnose problems where trees are not growing well.
this is whats up: http://ipm.ncsu.edu/scouting_fraser_fir/sampling_soil.html
Where to take soil samples. Take soil cores from around 10 to 15 trees per acre. If plant tissue samples are taken, take soil cores from around the same trees. Take four cores per tree, varying the position of the core between the row, middles, and dripline.
Mix all cores from all locations in a bucket before placing a single sample in the soil sample box. Boxes and forms can be obtained from your local county center of the North Carolina Cooperative Extension Service.
When to take plant tissue samples. Tissue samples provide information on more nutrients than the soil samples. Comparing the soil samples with the plant tissue sample can show if the tree is taking up the nutrients. Take the first tissue sample when the trees have been in the field for 3 years. Take a second tissue sample when the trees are a year from market to help fine-tune fertility recommendations and to make certain that color and needle retention will be good at harvest.
Additional tissue samples should be taken to help diagnose the cause of color problems or poor growth in trees any time through the rotation or any time through the year. When diagnosing growth problems, always take two plant tissue samples -- one from the problem trees and a separate sample from good growing trees in the same block.
Time of year to take plant tissue samples. Tissue samples taken when the trees are dormant reflect nutrient levels most accurately. Nutrient levels in actively
growing tissue may vary considerably from the established standards. Therefore, avoid sampling from bud break until bud set. Samples taken during the active growth period should only be used for problem trees, and the results should be compared to samples taken at the same time from healthy trees.
How to take plant tissue samples. Sample from the same trees you have taken soil samples from. Plant tissue samples without a current soil sample are worthless. It is usually best to take samples from trees that are average in growth rather than from the best or the worst looking trees.
Take two shoots from the most current growth. Samples should be from the upper third of the tree. Try to sample shoots from a uniform position on branches such as a branch terminal. The laboratory will need at least 40 inches of growth to run their tests.
Local county extension agents can give you more information on taking soil and plant tissue samples and help you determine fertilizer needs from sample results. Your county agent can also help you take samples to diagnose problems where trees are not growing well.
Mr.Marijuana420
Well-Known Member
the only problem is that thats not cannabis
Mr.Marijuana420
Well-Known Member
i dnt see y ppl are trying to discredit the guy, hes done multiple tests w/ multiple strains, and they all show, to not be needing a high amount phosphorous, as nute companies say, ppl need to learn to take info in from some1 whose done the tests and has the experience rather than being ignorant and claiming to know more, the guy has done tons of lab tests that none of us have conducted
i dont see how marijuana is so completely different from any other plant...biologically anyway. some plants may or may not use more of a particular nutrient, but they all take them in from the roots...mainly...a tissue sample is taken the same way, and if you let MJ go...she doesnt completely die, but goes dormant in the winter also...
thats like me making my own vicodin without as much opiate in it, and saying o well...the human bod's opiate receptors dont really use all the opiate in the pill, so im just not going to add as much from now on...what happens? it then goes from a high level pain killer...to a tylenol.
Mr.Marijuana420
Well-Known Member
that wasnt his point he said excess phosphorous will give your buds a harsher smoke, so if ur plant doesnt need it, y give it to it,
Mr.Marijuana420
Well-Known Member
every1 has there methods if u want to continue what ur doing so be it , thats ur thing, but i liked the video and appreciated the knowledged i gained from it, growing is about refineing ur methods to become a better grower alltogether and thats what this info is gonna help me do, if ur happy where ur at, so be it
Prefontaine
Well-Known Member
I do agree that doing chromatography tests without correlating it with soil tests and using a wide variety of different nutrients to determine which ions/cations most effectively deliver the phosphorous to the plant is somewhat of a waste of time, I would like to see some people to more indepth studies on what our girls need. and I would like to point out that most nute companies arent performing or at least arent sharing their scientific knowledge, at least this guys is educating us