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Nitrogen Question


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#1 Racerxxx OFFLINE  

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Posted May 08, 2013 - 08:44 PM

Was talking to my neighbor last night about his garden. He has lettuces, spinachs and such that are HUGE. I asked what he did. He uses 34 percent straight nitrogen, sparingly. He sprinkles a small handfull every so often. I need my garden to really produce this year. Ive been using a organic nitrogen fertilzer that is about 5 percent plus some P and K.

Now instead of running out to get some 34 percent can I just throw out some more 5 percent?

 

For instance:

If I throw out 4 handfulls of 5 percent at the same spot is that 20 percent?

If i throw out 4 handfulls of 5 percent at the same spot is that just a bigger pile of 5 percent?

Is nitrogen application cumulative or constant?

Thanks.


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#2 JD DANNELS OFFLINE  

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Posted May 08, 2013 - 09:01 PM

That's a good question and I don't really have an answer for you. My dad gave me 3 bags of  30% nitrogen  he bought on markdown. I had never added any  until this year I spread some and tilled it in.

many plants have different requirements you might want to check out.


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#3 wilberj OFFLINE  

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Posted May 08, 2013 - 10:13 PM

I would say no, more you put more it will stay 5% :D


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#4 John@Reliable OFFLINE  

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Posted May 08, 2013 - 10:34 PM

He has lettuces, spinach's and such that are HUGE.

What about non leaf type plants? I prefer a balanced blend, timing is everything. :thumbs:

 

P.S. Excess nitrogen fuels fast foliage growth so that your garden has an appearance of a jungle gone wild :D , but other plant growth suffers as a consequence. Energy for flower growth is redirected to foliage proliferation.High levels also require more water, can burn plants, etc.


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#5 Amigatec OFFLINE  

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Posted May 09, 2013 - 03:35 AM

I wouldn't use the 34% stuff, that sounds like Urea to me. If you add the 5% you are also adding extra P and K. I would use Blood meal myself, it's more organic than the chemical stuff. It won't wreck the soil biology like all the chemicals will. Blood meal is about 12% and wouldn't burn your plants like Urea, and it doesn't have any P or K in it.the only down side is, it may atrack animal because they smell the blood.
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#6 crittersf1 OFFLINE  

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Posted May 09, 2013 - 04:10 AM

5% is 5%, no matter how much you use.


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#7 Alc ONLINE  

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Posted May 09, 2013 - 05:34 AM

I heard the same thing that  John mentioned above , that the nitrogen make the leaves grow well but might hurt veggies  like peas , beans  ect .


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#8 Amigatec OFFLINE  

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Posted May 09, 2013 - 06:04 AM

The 5% refers to how much of the nutrients is in the product. If it says 5-5-5, only 15% is nutrients and the rest is filler. Most of your chemical fertilizers are salt based and will deplete the soil of bacteria, and fungus. A portion of these are necessary for good plant growth.

A better approach is to sow rye grass in the garden in the fall and then mow it and plow it under in the spring.
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#9 JD DANNELS OFFLINE  

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Posted May 09, 2013 - 08:59 AM

I have never used much chemical fertilizer. I have heard too much nitrogen will make tomatoes grow huge vines and not set fruit.


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#10 EconChuck OFFLINE  

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Posted May 09, 2013 - 10:00 AM

Hi,

 

Let me try to explain something about percentages when used in fertilizer mixtures:

The 5% or 32% percent refer to the contents ratio.

So if I apply 5# of 5% at one point I've put 5%x5#=.25# of nitrogen

If I apply 5 # of a 32% fertilizer I've applied 32%x5#=1.6# of nitrogen.

 

I'm not sure what a recommended dosage per plant is and that would need to be taken into account

 

So applying more # of a 5% mixture certainly does not change the ratio but changes the amount of nitrogen applied, which in the end is what you want.

 

Chuck


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#11 olcowhand OFFLINE  

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Posted May 09, 2013 - 10:46 AM

Hi,

 

Let me try to explain something about percentages when used in fertilizer mixtures:

The 5% or 32% percent refer to the contents ratio.

So if I apply 5# of 5% at one point I've put 5%x5#=.25# of nitrogen

If I apply 5 # of a 32% fertilizer I've applied 32%x5#=1.6# of nitrogen.

 

I'm not sure what a recommended dosage per plant is and that would need to be taken into account

 

So applying more # of a 5% mixture certainly does not change the ratio but changes the amount of nitrogen applied, which in the end is what you want.

 

Chuck

 

Chuck has it right, ratio remains constant, but pounds of N will increase.  Timing of applying extra N is everything.  Applying too much N early will go to vine/stalk proliferation, but applying a small amount at first, followed by additional N near time of, say lets say as with corn, just before or at tasseling, adding a side dress of N will boost the ear size without going to the stalk, as the stalk is at or near maturity.  Same with other crops with fruits, such as tomato, pepper, etc.  I would think early N would be fine with leaf plants such as spinach.  Best is to have a soil sample tested so you know exactly what you need.  Your Extension Service office can do that for you.


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