Only just starting to scratch the surface of what soil science is imk. Pun intendedThe other interesting point id the potassium returned to the soil. Would that affect a model where straw is removed? It does seem that we are probably better off unlocking K rather than adding more. Soil science is probably the next big step in crop productivity IMO
Really? You got on any info on that?They used MOP to firm up clay subsoils when building runways during the war.
I would expect some clay soils to have huge reserves of potash, but I doubt light sand has much to release? Opposite applies to phosphate. On our sand we struggle to get phosphate levels below 3, but potash 0 to 1.5.
Maybe the opening of the poly halite mine up in N Yorks or somewhere will be the answer.
Tissue test should satisfy as to whether the plant is getting what it needs. Though it will always be slightly short of k at stem extension I guessI'd heard that about the aerodrome runways too. Something to do with the KCl binding the clay platelets very tightly together.
We haven't put any K fertiliser on most of our fields for years and the index keeps rising (whenever we do a conventional test) but as it seems the testing is flawed, perhaps that doesn't mean much. It is reassuring though to read some research that backs up a hunch...quite unusual too, to get some that tells you that you don't need to spend money!
Knowing is not the opposite of guessing. Not knowing is the opposite of knowing. Guessing could be right or wrong. But I used the word because I was introducing a supposition because I did not know whether Martian already does correlate tissue tests with soil tests and so wasn't in a position to definitely say so.knowing is oposite of guessing, I guess.
p.s. after a eveing out with the Top Twins in KiwiLand