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Soil Test Results & How To Interpret  RSS feed

 
Mav Thomas
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Hi all,

I'm new to the forum and hope someone who has mastered the analysis of soil tests can help me out here. I want to establish a kiwiberry plantation anf recently did a soil test. Here are the results (all numbers are in mg per 100g):

N-NH4+: 1.58
N-NO3-: 0.699
P2O5: 10.3
K2O: 49.2
Mg+2: 0.818
Ca+2: 29.5
SO4-2: 40.9
Mn: 0.089
Zn: 0.02
B: 0.0637
Cu: 1.45
Fe: 1.89
Mo: 16.3
Cl: 0.001
CO2: 8.82
EC: 0.12
pH of soil: 5.96

From what I understand the molybdenum amount is through the roof. After reading online it's a really really good element to have in the soil. But then again too much of a good thing isn't so good either. I'm trying to see if this and the rest of the soil test show if the soil is good enough to grow kiwiberries. It's been a pasture for the past 20+ years so it hasn't been tilled. I'm just worried about the molybdenum amounts and if they will have a detrimental effect on a kiwiberry crop going forward.

Any other insights about the soil analysis results would be GREATLY appreciated!

Cheers!



 
Rodger Pilkington
Posts: 12
Location: Perth, Australia
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What was the testing method used?
 
Mav Thomas
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Hi Rodger,

To tell you honestly I don't know how the lab tested tge soil. What they did ask for though is that I get soil samples from all 4 corners of the plot of land and mix them. They took about a 1-2 kg sample of soil and ran their tests.

I don't think there would be a data integrity issue, I just want to make sure that extra molybdenum won't negatively affect the kiwiberries I do plant next spring.
 
Rodger Pilkington
Posts: 12
Location: Perth, Australia
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I wouldn't call myself expert, but I have helped a few people improve their soil.

Without knowing the testing method I don't know how relevant the analysis I provide below is to your land.

From the numbers given, am I correct in assuming that the land is not growing much of anything right now? Perhaps it is a hard-packed soil with a few of natures helpers struggling in it? The Mo is only one of the imbalances.

TCEC (assumed from EC) is almost non-existent  [this is the nutrient holding capacity of the soil]
Free Hydrogen is missing?  (soil is acidic, weird)
Nitrogen is VERY low
Calcium is a little low
Magnesium is VERY low
Potassium is VERY high
Sodium is missing?
Phosphorous is VERY low
Boron is low
Iron is VERY low
Manganese is VERY low
Copper is low
Zn is VERY low

Without knowing the test method I am reluctant to give you suggestions for amendments.

I might suggest you use Logan labs (standard soil test) or Spectrum Analytic (S3 test).  I say this because all of my information is distilled from Steve Solomon's The Intelligent Gardener, and he recommends these labs, for the most accurate results.  Both options are very cheap from my Australian perspective.
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