Steve wrote:
sorry rope and timmy, its a well documented fact that plants will have measureable amounts of nitrates in their leaves, especially in high fert / low light conditions.....
....I think its a storage mechanism, and when there is insufficient lihgt to make use of it then it remains.
Pretty much what I said/meant Steve....
high "complete" fertilisers, usually urea based, ammonia - uptake and conversion in plants....
And you're probably right that under certain conditions, particularly low light where sugar conversion and other plant chemistry conversions are correspondingly slowed.... the nitrates probably are "stored" if the plant is harvested at that stage....
Hydroponic fertilisation however as I said "deliberately" avoids the use of such high fertilisers for that reason.....
I'd suspect that in low light, low photosynthesis periods, nitrates may also be stored in plants in an AP system given our direct high nitrate environment....
Maybe that's why many vegetables are harvested early morning, after perhaps the plant processes during the night have off-gassed a degree of nitrates through conversion.... must be a reason for it... anyone know?
Would make for interesting experiment as you say Steve.
Backyard Aquaponics
) Otherwise they are all limp and unappetising.
Shame on you F&F, you should be setting an example not putting bad ideas into the younguns heads here 