POTASSIUM-SUPPLYING POWER OF SOME CANADIAN SOILS

potassium supplying power of selected alkaline-calcareous soils in the north-west of iran

solution potassium (so-k) and exchangeable k (ex-k) extracted by nh4oac are the major sources of potassium used by plants, but initially non-exchangeable k (nex-k) can also contribute significantly to plant uptake. perennial ryegrass (lolium perenne, cv. roper) was successively planted in ten surface soil samples with different clay mineralogical composition belonging to five soil types to dete...

Potassium Supplying Capacity and High Efficiency Use of Potassium Fertilizer in Upland Soils of Hunan Province (China)

Fixation of Potassium in Soils.

That some of the potassium added in the form of fertilizers or otherwise becomes fixed in the soil had been known for a long time. With the clarification of the phenomena of base exchange in soils by Gedroiz it was revealed that the K-ion is fixed in the exchange complex not only in replaceable but also in non-replaceable form. A review of the work in this connection may be found in the paper b...

Effecting of the hidden layers in Canadian political power

Canada’s immigration system is currently undergoing significant change driven by several goals that include: (1) a desire to improve the economic outcomes of entering immigrants, given the deterioration in labour market outcomes over the past several decades; (2) an attempt to better respond to short-term regional labour market shortages often associated with commodity booms, and (3) a desire t...

a comparison of some extractants used for the assessment of available potassium in some hamadan soils

potassium (k) is an element essential for plant growth, playing a significant role in physiological and biochemical processes in plant. the relationship between a soil testing extractant vs. plant nutrient uptake should be a determining parameter in the selection of a soil testing method. the objective of this study was to evaluate different extractants employed for extracting available k in 10...