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17.08.2020 - Peer Leithold (Send email to Peer Leithold)

Incorrect liming is still a problem

Every farm manager still loses an average of 50 €/ha in yield every year due to incorrect liming. Our evaluations of almost 300,000 soil samples from the last four years show the following damage pattern:

 Salary grade ASalary grade BSalary grade ESum GK (A/B/E)
Floor assembly 11%15%35%51%
Floor assembly 21%14%20%35%
Floor assembly 31%23%7%31%
Floor assembly 41%19%7%27%
Floor assembly 51%11%2%15%

With the exception of soil group 5 (~20,000 analyses), the values of all other soil groups (~70,000 analyses per soil group) can be considered representative. The results are alarming!

  1. First, however, some good news: There are hardly any more area shares in grade A. That is very good.
  2. Areas with content classes B are unfortunately still widespread with 14% to 23%. Yield losses are between 5% and 15%, depending on the sensitivity of the crops.
  3. The lighter soils tend to be overcalcified. This can be seen above all in soil groups 1 and 2 where content class E is worryingly widespread at 20% and 35% respectively.
  4. The better soils tend to receive too little lime. This is visible in soil groups 3 and 4, where the proportion of content class B is disproportionately high at 19% and 23% respectively.
  5. In total, 27% to 51% of the farm areas have an incorrectly adjusted pH value!
  6. On average, this leads to a yield loss of 3% to 5% across all areas. If this is extrapolated with the average yields of the soil classes, the financial loss is about 40 to 60 €/ha.

The solution to this dilemma is relatively simple: fertilise the partial areas!

The lime quantities of content classes E and also D+ have to be redistributed to content classes A and B. In total, it will probably rarely be necessary to lime more or less. Simply redistributing is usually sufficient. In this video you will learn how to do this in a simple way.


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