[paradoxlost]

How do people here take into account solubility suppression from similar ion valency?

[Avenger]

Originally Posted by slownickel

The quantities being applied are so small that it is difficult or better yet, impossible that they will show up dramatically in a soil analysis.

That is how I see it from where I am standing as well. I see fertigations in real soil growing systems as a way to add what may be missing from the soil solution now, not as a means to increase the capacity of the soil to provide said missing elements to the soil solution in the future.

Thats not to say that you cant use water as a carrier to more easily/evenly apply your manganese sulfate addition while mixing the soil/media in preparation for planting. But this would likely be a higher concentration of manganese sulfate in solution than what I would consider fertigation or working solution strength.

[slownickel]

Originally Posted by Avenger

That is how I see it from where I am standing as well. I see fertigations in real soil growing systems as a way to add what may be missing from the soil solution now, not as a means to increase the capacity of the soil to provide said missing elements to the soil solution in the future.

Thats not to say that you cant use water as a carrier to more easily/evenly apply your manganese sulfate addition while mixing the soil/media in preparation for planting. But this would likely be a higher concentration of manganese sulfate in solution than what I would consider fertigation or working solution strength.

How many ppms of Mn you figure is the limit of your comfort zone during irrigation?

[oct]

Plugged.

[xmobotx]

i got the impression avenger was saying that watering in could be utilized w/ a container mix to raise PPMs

Originally Posted by Avenger

~Thats not to say that you cant use water as a carrier to more easily/evenly apply your manganese sulfate addition while mixing the soil/media in preparation for planting. But this would likely be a higher concentration of manganese sulfate in solution than what I would consider fertigation or working solution strength.

i'm inclined to use small amounts hoping to make minor bump-type corrections & then get further testing.

[slownickel]

Originally Posted by xmobotx

i got the impression avenger was saying that watering in could be utilized w/ a container mix to raise PPMs



i'm inclined to use small amounts hoping to make minor bump-type corrections & then get further testing.

I'm inclined to use what I call mini correctives.

This means that I over apply what I am trying to balance. Injecting in 300-400 ppms of Mn into a nearly field capacity soil, knowing that that "heavy" injection will spread through out where there is water.

I do this sometimes twice a week if necessary (meaning high pH) with fulvic acid. 4 grams of Mn Sulfate in a gallon of water is about 340 pppm of Mn. This is a dosage for a big pot, 200 gallons or so. Obviously use less for a small plant.

At the end of the season, the Mn in the soil may have more Mn, a whole 4 or 5 ppms more. Which I don't consider much when I need 200 ppms of Mn in the soil to get to my objective of Fe=Mn. And even then, the Mn issue is not over as all the OM that is degrading is made of iron, the soil that is breaking down is made of iron.

In parts of the world where there is more Mn than Fe in the soil, yields across the board are 50% higher. In the case of pineapples, 200% higher.

Experiment folks!

[slownickel]

Originally Posted by HazyBulldog

As for fertigation upping ppms in soil results. I disagree with both you and Slown. Field soil, yes. Our quick moving, light weight soils, I disagree. You guys are both leaps and bounds smarter than I, more experienced than I, and are better looking no doubt. However, in a month, I will be flabbergasted to not see movement in ppms in the soil. We shall see. I will report the results.

Good point, with a light mix (which most don't have), you can move that chemistry easily. Wholly agree.

Keep listening to that farmer recording! Yer right up there pal!

[xmobotx]

i accidentally bumped about a 4X adjustment of copper sulfate. a little concerned about danger to the fungal activity but less so after post #2734

i have both yard soil & container mix & tests from both

[plantingplants]

Slow, i was under the impression you had just began experimenting with trying to hit 1:1 mn:fe. Have you done trials at that ratio yet?

Also where do you get your fulvic? Any state side cheap ag sources you know of?

[Bobbo4200]