ISSN:
1573-5036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Soil samples collected 6 years after raising of various cereals, pulses, oil seed and tuber crops in nine fixed rotations were used to study the quantity-intensity relations of potassium. Potassium activity ratio, where the soil neither gains nor looses K, was correlated in a highly significant manner (P = 0.01) with the total amount of K fertilizer applied during 6 years. The K buffering capacity, the slope of the Q/I curve, when the soil neither gains nor looses K, was positively correlated (P = 0.05) with K saturation of the total and inorganic cation exchange capacities to a similar extent. Superimposing Q/I curves showed no appreciable difference between samples from different treatments. Desorption of potassium with increasing soil∶solution (0.01M CaCl2) ratio followed a Langmuir type of equation and supported the conclusions drawn from quantity-intensity curves.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02107185
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