Author Topic: Potassium nitrate worked!  (Read 16120 times)

Tropicdude

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Re: Potassium nitrate worked!
« Reply #25 on: March 11, 2013, 12:45:50 PM »
Spraying of KN03 also has to be timed right,  and this will vary depending on the location and variety of tree.

Below is an excellent report on trials done with KN03.  with information on concentrations and results with other nitrate based sprays. there are also charts in this PPT presentation that shows the effectiveness of KN03 application on different varieties.  Note. this is a industry presentation, so they are biased, but I have seen other reports with similar findings.  there is also information on KN03 for other crops like Litchi .

http://www.kno3.org/images/pna/pdf/PPT%20Non-nutritional%20applications%20of%20potassium%20nitrate%2029.10.10%20ENG.pdf

I think your KN03 sprays were a bit late for Aruba, I am glad you had some success though. 

Next time after the post harvest pruning, wait for the new growth to be around 4-5 months, then spray your KN03,  you may have to experiment with different concentrations, 1-4%  ( sometimes more is not better ). this may be different for each variety.   local commercial farmer usually only have 1 variety of tree, so they know already exactly what the best concentration, and the date they should spray.  I believe they do this around December here in the DR.
William
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happyisland

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Re: Potassium nitrate worked!
« Reply #26 on: March 12, 2013, 03:42:14 PM »
Spraying of KN03 also has to be timed right,  and this will vary depending on the location and variety of tree.

Below is an excellent report on trials done with KN03.  with information on concentrations and results with other nitrate based sprays. there are also charts in this PPT presentation that shows the effectiveness of KN03 application on different varieties.  Note. this is a industry presentation, so they are biased, but I have seen other reports with similar findings.  there is also information on KN03 for other crops like Litchi .

http://www.kno3.org/images/pna/pdf/PPT%20Non-nutritional%20applications%20of%20potassium%20nitrate%2029.10.10%20ENG.pdf

I think your KN03 sprays were a bit late for Aruba, I am glad you had some success though. 

Next time after the post harvest pruning, wait for the new growth to be around 4-5 months, then spray your KN03,  you may have to experiment with different concentrations, 1-4%  ( sometimes more is not better ). this may be different for each variety.   local commercial farmer usually only have 1 variety of tree, so they know already exactly what the best concentration, and the date they should spray.  I believe they do this around December here in the DR.

Cool presentation. Particularly interesting that it's not understood exactly why KNO3 induces flowering.

I appreciate your thoughts on timing KNO3 application too. This year I didn't really try to time it, but just saw the season slipping away and panicked.  :D

Tropicdude

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Re: Potassium nitrate worked!
« Reply #27 on: March 12, 2013, 03:51:08 PM »
Funny thing is that after seeing your post, I went out a sprayed my trees,   I did not have any KNO3 but I do have a 15-5-45 which is similar to a product in that report.  my NDM looks like it may flower for the first time, tips are swelling and look a bit different from previous times, so fingers are crossed. at minimum, the foliar spray may help with holding the flowers and fruit.
William
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bangkok

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Re: Potassium nitrate worked!
« Reply #28 on: March 13, 2013, 12:19:48 AM »
Funny thing is that after seeing your post, I went out a sprayed my trees,   I did not have any KNO3 but I do have a 15-5-45 which is similar to a product in that report.  my NDM looks like it may flower for the first time, tips are swelling and look a bit different from previous times, so fingers are crossed. at minimum, the foliar spray may help with holding the flowers and fruit.

That's funny because spraying KNO3 has a negative effect on NDM mango's according to the results of this report.

It works on almost all mango's except NDM.

Tropicdude

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Re: Potassium nitrate worked!
« Reply #29 on: March 13, 2013, 02:37:40 AM »
Funny thing is that after seeing your post, I went out a sprayed my trees,   I did not have any KNO3 but I do have a 15-5-45 which is similar to a product in that report.  my NDM looks like it may flower for the first time, tips are swelling and look a bit different from previous times, so fingers are crossed. at minimum, the foliar spray may help with holding the flowers and fruit.

That's funny because spraying KNO3 has a negative effect on NDM mango's according to the results of this report.

It works on almost all mango's except NDM.

I noticed that,  I think its all about getting the timing and dosage right for each variety, I only used a low concentration, about 1 teaspoon per gallon  more for nutrient purpose and not as a flower initiator,  if you apply nitrogen at the wrong time you could definitely stimulate foliage growth and not flowering.   I haven't done the calculations yet , but I believe I would have to use the same dosage as happyisland,  around 2 tablespoons per gallon.  I will have to look at the product label again.  its always a pain as these products are usually "liter per Ha"  or 1 liter per 1000 liters water in many cases.
William
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happyisland

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Re: Potassium nitrate worked!
« Reply #30 on: March 15, 2013, 09:47:42 AM »
Now my NDM4 is blooming for the first time ever!

bangkok

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Re: Potassium nitrate worked!
« Reply #31 on: March 15, 2013, 10:05:09 AM »
Now my NDM4 is blooming for the first time ever!

Great! I hope for you it is a green NDM variety because they taste better then the golden. Don't fertilise with N no more now and don't water irregular or the fruits might collapse

I would not use kno3 as a fertiliser because your tree will have a shorter life if this is used often. I have no idea how old a grafted mangotree or one from seed can get by the way.

happyisland

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Re: Potassium nitrate worked!
« Reply #32 on: March 15, 2013, 10:58:06 AM »
Now my NDM4 is blooming for the first time ever!

Great! I hope for you it is a green NDM variety because they taste better then the golden. Don't fertilise with N no more now and don't water irregular or the fruits might collapse

I would not use kno3 as a fertiliser because your tree will have a shorter life if this is used often. I have no idea how old a grafted mangotree or one from seed can get by the way.

Thanks for the warning about using KNO3 too much - I am definitely thrilled how well it has worked, and am tempted to overuse it in the future.

When you say not to water irregularly what do you mean exactly? It is dry season here, the tree is still small (around 5 feet tall, though it has been in the ground for a couple years), and I have not been watering it at all. Should I start watering it on a regular basis while it flowers and fruits?

Tropicdude

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Re: Potassium nitrate worked!
« Reply #33 on: March 15, 2013, 11:43:08 AM »
NDM are infamous for splitting,  they say its because of irregular watering,   I think you want to keep the soil lightly moist now, no heavy cycles of dry and wet.    I can see where this may be a problem in Floridas sandy soils, as they can dry out quick between watering.  how is your soil? does it retain moisture well or dry out quickly.  if yuo have a high water table, and the tree already has tapped a water source, you may not need t water at all.

From what i have gathered from other posts, the NDM #4 is more prone to splitting fruit, compared to the regular NDM.
« Last Edit: March 15, 2013, 11:45:11 AM by Tropicdude »
William
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happyisland

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Re: Potassium nitrate worked!
« Reply #34 on: March 15, 2013, 07:04:32 PM »
We have clay soil, and almost no rainfall at this time of year, but I haven't been watering the NDM and it seems ok. I think I'll switch to hand-watering it once a week, just to keep it hydrated. We're so close to sea level that I'd imagine the water table is quite close to the surface.

happyisland

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Re: Potassium nitrate worked!
« Reply #35 on: March 24, 2013, 08:46:13 PM »
And now my Alphonso is getting in on the action! It's fruiting for the first time ever, around 7 weeks after I started weekly KNO3 applications. I'm getting pretty excited down here!

zands

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Re: Potassium nitrate worked!
« Reply #36 on: March 24, 2013, 09:52:55 PM »
It's about time you got redemption. Mango redemption.

Tropicdude

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Re: Potassium nitrate worked!
« Reply #37 on: March 24, 2013, 11:32:26 PM »
Good now we have Alphonsos fruiting in Aruba and California, I look forward to a review on these,  my container NDM still has not pushed out anything, but the terminals are swelling, I hope it flowers.
William
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happyisland

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Re: Potassium nitrate worked!
« Reply #38 on: March 25, 2013, 07:56:47 AM »
It's about time you got redemption. Mango redemption.

Damn right!


happyisland

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Re: Potassium nitrate worked!
« Reply #39 on: March 25, 2013, 07:58:41 AM »
Good now we have Alphonsos fruiting in Aruba and California, I look forward to a review on these,  my container NDM still has not pushed out anything, but the terminals are swelling, I hope it flowers.

Alphonso is supposed to be pretty bad, when grown in Florida, right? I have a good feeling about Aruba-grown though, since it's so dry down here. I'm hoping our prolonged drought season will mimic the conditions that the tree likes back in its homeland. Have you ever had a Dominican-grown Alphonso?

Tropicdude

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Re: Potassium nitrate worked!
« Reply #40 on: March 25, 2013, 12:31:17 PM »
Good now we have Alphonsos fruiting in Aruba and California, I look forward to a review on these,  my container NDM still has not pushed out anything, but the terminals are swelling, I hope it flowers.

Alphonso is supposed to be pretty bad, when grown in Florida, right? I have a good feeling about Aruba-grown though, since it's so dry down here. I'm hoping our prolonged drought season will mimic the conditions that the tree likes back in its homeland. Have you ever had a Dominican-grown Alphonso?

No I have not tried any Alphonso yet.  I do not think Alphonso is considered bad, in Fla. my take is that it just not as good as one grown in India, and is just mediocre in Florida.  I have two potted Alphonso, and I am going to give one away to a friend that lives in a semi arid area of the country, I think they will do best there.

I did some research on climatic in the area where Alphonso grows best in India, for the most part , these trees get almost no rain all through the fruit development stage, fruit is picked just before the monsoon rains,  I think some flood irrigation is used in the driest areas/periods.   so its like no rain until after harvest, then you have rain almost non stop for 3 months.

I have high expectations on the Kesar, here in the city where we get more rain, I think it will do better, I will try and do an approach graft, so i can give one to a friend on the north coast where generally mangoes for plantations are not recommended, because it rains a lot, and soils are heavier.

Anyway, good luck on all your trees,  for the Alphonso you may just want to give them only enough water, this may be the "trick" for better flavor.
« Last Edit: March 25, 2013, 12:33:14 PM by Tropicdude »
William
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happyisland

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Re: Potassium nitrate worked!
« Reply #41 on: March 25, 2013, 08:44:51 PM »
Good now we have Alphonsos fruiting in Aruba and California, I look forward to a review on these,  my container NDM still has not pushed out anything, but the terminals are swelling, I hope it flowers.

Alphonso is supposed to be pretty bad, when grown in Florida, right? I have a good feeling about Aruba-grown though, since it's so dry down here. I'm hoping our prolonged drought season will mimic the conditions that the tree likes back in its homeland. Have you ever had a Dominican-grown Alphonso?

No I have not tried any Alphonso yet.  I do not think Alphonso is considered bad, in Fla. my take is that it just not as good as one grown in India, and is just mediocre in Florida.  I have two potted Alphonso, and I am going to give one away to a friend that lives in a semi arid area of the country, I think they will do best there.

I did some research on climatic in the area where Alphonso grows best in India, for the most part , these trees get almost no rain all through the fruit development stage, fruit is picked just before the monsoon rains,  I think some flood irrigation is used in the driest areas/periods.   so its like no rain until after harvest, then you have rain almost non stop for 3 months.

I have high expectations on the Kesar, here in the city where we get more rain, I think it will do better, I will try and do an approach graft, so i can give one to a friend on the north coast where generally mangoes for plantations are not recommended, because it rains a lot, and soils are heavier.

Anyway, good luck on all your trees,  for the Alphonso you may just want to give them only enough water, this may be the "trick" for better flavor.

that sounds perfect, since we won't get any rain down here until September or so. I won't give it any water myself unless it looks like it's about to shrivel up. Any chance it would drop its fruit if it got super dry, or would the leaves start to curl before that?

My wife has a ton of Indian friends, and I'm hoping my Alphonsos turn out great so I can blow their minds with a taste of home!  :)

Tropicdude

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Re: Potassium nitrate worked!
« Reply #42 on: March 25, 2013, 09:05:14 PM »
I bet that they would never admit it is as good as one grown from the homeland, even if it is :)  don't want to kill your tree, I think a bit of water now and then is ok, specially when the fruits are just starting so they do not drop.  I have no personal experience,  but like many other fruits, it makes sense to restrict water toward the later stages, to build flavor.
William
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harveyc

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Re: Potassium nitrate worked!
« Reply #43 on: March 26, 2013, 12:52:45 AM »
I believe I read above where Oscar wrote that potassium nitrate is not a fertilizer.  I've previously purchased a potassium nitrate product for a foliar spray program in my chestnut orchard.  Here is the MSDS on the product I have on hand: http://www.ncmissouri.edu/hea/barton_epaosha/39036_MSDS_PotassiumNitrate.pdf  I have about 100 pounds of it now in two bags and have mostly used it to fertilize my banana plants since I'm not continuing with that foliar program ($$$$).

Tropicdude

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Re: Potassium nitrate worked!
« Reply #44 on: March 26, 2013, 02:00:04 AM »
I believe I read above where Oscar wrote that potassium nitrate is not a fertilizer.  I've previously purchased a potassium nitrate product for a foliar spray program in my chestnut orchard.  Here is the MSDS on the product I have on hand: http://www.ncmissouri.edu/hea/barton_epaosha/39036_MSDS_PotassiumNitrate.pdf  I have about 100 pounds of it now in two bags and have mostly used it to fertilize my banana plants since I'm not continuing with that foliar program ($$$$).

Potassium Nitrate can definitely  be used as a fertilizer and has been used as such for a long time and all over the world ,  now how cost effective it is compared to other types of fertilizer , is a good question.   I have not heard of anyone using KN03 as part of the main fertilizing program here, so my guess its just too expensive to use it that way, I have only seen it used for the flowering sync, and stuff mentioned above.  here is more info on KN03 from those that promote it.

http://www.kno3.org/en/product-features-a-benefits/potassium-nitrate-product-features-and-benefits-overview

 
William
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bangkok

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Re: Potassium nitrate worked!
« Reply #45 on: March 26, 2013, 03:18:07 AM »
 N-P2O5-K2O (13-0-46) is what i have from the Promango brand. I didn;t know that this is also KNO3.

The description (in thai language) tells to  also use it in the soil and also for other plants.

I will try it as fertilizer next season.

mikesid

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Re: Potassium nitrate worked!
« Reply #46 on: March 26, 2013, 09:12:36 AM »
You can buy KN03 here in the states as a product called Stump Remover, made by Spectracide...like 6 bucks a pound...you can get at any big box store.

 

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