Home Crop Monitoring The Agronomists, Ep 32: Amber Knaggs and Chris Roelands on tissue testing

The Agronomists, Ep 32: Amber Knaggs and Chris Roelands on tissue testing


A tissue check may give you a snapshot into what’s occurring in a plant so far as nutrient uptake is worried. The check doesn’t essentially predict a difficulty and not all outcomes are actionable. That’s left many agronomists questioning how finest to make use of tissue assessments along side soil assessments, zone mapping, and fertility planning.

To sort out that dialogue, host Lyndsey Smith is joined by Chris Roelands, with Honeyland Ag Providers, and Amber Knaggs, of Croptimistic Know-how. From the place and when and the way to pattern a plant, to what deficiencies might be corrected, to how finest to work tissue testing into the toolbox, hear on to this episode of The Agronomists!

Catch a brand new episode of The Agronomists each Monday night time at 8 pm E!


  • New individuals to the present! That is each our friends’ first time on The Agronomists (so an intro is due)
  • Tissue check report instance (good to know what it seems like, what to search for)
  • Sufficiency ranges, balances, ratios. How low is low?
  • Is a plant tissue check proactive or reactive? Knaggs says that it’s reactive, typically. P deficiency in wheat instance the place the fertilizer did go down, however in a side-band, not seed-placed the place it was actually poor. Bummer
  • Reactive and a snapshot of what’s occurring within the subject
  • Clip #1: Corn Faculty: Hideous cobs? It might be boron deficiency
  • Is the most effective to drag tissue samples that comply with grid/zone soil sampling? Relies upon what that zone is telling you within the first place
  • Keep in mind, plant physiology and verify the lab requisition type for what space of the plant must be sampled. For corn: most up-to-date collared leaf, for soybeans and wheat: most lately matured leaf
  • When sampling the newest collared leaf, the place do you sever it?
  • When sampling soybeans, do you chop on the base of the trifoliate and do you embrace the leaf stem?
  • Some individuals pull the entire plant! Which is quicker, however isn’t wanted within the lab, thanks
  • What’s the turn-around check, and are all findings value taking motion on?
  • Let’s take a second to speak about B, and it’s availability. It may be out there, then not out there fairly fast
  • There are such a lot of issues that work together with the crop, together with surroundings, and a lot can change with the crop’s fertility all through the season
  • Clip #2: Soybean Faculty: Managing manganese deficiency
  • If in case you have good soil assessments and an excellent sampling routine, doesn’t tissue testing simply replicate what the crop may do? Simply because there’s a nutrient that needs to be out there within the soil check, doesn’t imply it should get into the crop. Soil isn’t static, and it may be extremely variable, so environmental circumstances can actually have an effect on nutrient availability all through the season
  • Mn toxicity in canola, attention-grabbing case examine
  • Generally when individuals look to do tissue testing, they’ve the sprayer prepared like a fighter jet, however not each situation might be solved in-season
  • Does a low studying of a nutrient indicate that plant progress or productiveness is being restricted, or may the calibration of the check be incorrect?
  • “My tissue test is back and I’m deficient in X.” How does an agronomist stroll by means of the choice making course of and set the expectations?
  • Don’t be afraid to name in reinforcements!
  • An agronomists favorite response to a query: it relies upon
  • Two issues we’ve discovered: be curious, and ask sensible individuals your questions (it pays to have an excellent workforce behind you as an agronomist)


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