Quantity-intensity ratio of potassium in gypsiferous soils in Iraq
| Autor: | Mijbil Mohammad Al-Jumaily, Hudhaifa Maan Al-Hamandi, Mohammed Ali Al-Obaidi, Radhwan Rafid Al-Zidan |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Pesquisa Agropecuária Tropical v.52 2022 Pesquisa Agropecuária Tropical Universidade Federal de Goiás (UFG) instacron:UFG |
| Popis: | In gypsiferous soils, potassium (K) undergoes leaching, precipitation and other reactions that reduce its availability. This study aimed to evaluate the physicochemical behavior of K in gypsiferous soils of the Salahaddin province (Iraq), in twelve locations chosen according to the variation in their soil physical and chemical properties. The K adsorption phenomenon was described by using thermodynamic parameters according to the quantity-intensity ratio (Q/I), with the following results: equilibrium activity ratio of 16 to 48 x 10−5 (mol L−1 )1/2, total labile K of 19 to 80 x 10−3 cmolc kg−1, potential buffering capacity of 22 to 42 cmolc kg−1 (mol L−1)−1/2, free energy of exchange of -1.237 to -1.086 kJ mol−1 and Gapon selectivity coefficient of 3.86 to 5.45 (L mol−1)1/2. All the investigated soils are characterized by good potassium reserves, but low in release. |
| Databáze: | OpenAIRE |
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