Unformatted text preview: NRES 201 Intro to Soil Science Lec. 33 4/9/2009
Potassium and Micronutrients Ch. 13 Much greater crop remoyal of K c When the yegetatiye matter is hanested.
- as \in11 a forage legume or \y hen corn is
grow 11 for silage.
- Soil K testing is imponant for alfalfa. M74. Potassium mu] imam ﬂops. MANAGEMENT OF POTASSIUM
Soil Fertility Testing Exehangeable K is replaee by slmking the soil with
lN NHy' aeetate. The NH ' ions re Jlaee K' ions 011 the exehange eom JlCX and the
4 I e I amount of potassium in the filtrate of the soil is determined. Pot: sium ehlori K
Trade term: murmte of potash 0-0-60 50"“ K.
The 1110 st eommon K fertilizer. mined from natural deposits ( sylyite) in Sa ateheyyan. LUXURY CONSUMPTION of K - The remoyal of greater amounts of K than needed
for the plants metabolic puiposes. - Especially significant for forage species. - Increased K uptake does not increase yield. ...
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