{"product_id":"ahlem-tlili-distribution-and-dynamics-of-boron-in-tunisia-9786209305900","title":"Distribution and dynamics of boron in Tunisia","description":"Boron is a soil microelement with a narrow margin between deficiency and toxicity. The results show a decrease in available boron with depth for calcareous soils (Luvisol-1, Vertisol, Fluvisol and Cambisol), while they increase in non-calcareous soils (Luvisol-2 and Luvisol-3). Calcareous soils contain more total boron than non-calcareous ones. Chemical fractionation shows that readily soluble boron represents less than 1.7% of the total, while the residual fraction exceeds 97.5%. Granulometric fractionation reveals that the majority of available boron is associated with the silty fraction (51%), followed by the sandy (34%) and clayey (15%) fractions. In terms of humic substances, humic acids account for 70.69% of total boron, compared with 27.88% for fulvic acids and 1.43% for humin. Adsorption and desorption follow the Freundlich isotherm, with high boron retention during the desorption process. In hydroponics, the optimum boron dose for lettuce (Lactuca sativa L.) is 0.5-5 mg\/kg to avoid toxicity. However, for soil-grown lettuce, this concentration may exceed 5 mg\/kg.","brand":"Our Knowledge Publishing","offers":[{"title":"Default Title","offer_id":53812573733206,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0925\/5829\/5382\/files\/product_image_9786209305900_1.jpg?v=1781817972","url":"https:\/\/www.momoxbooks.com\/products\/ahlem-tlili-distribution-and-dynamics-of-boron-in-tunisia-9786209305900","provider":"momoxbooks","version":"1.0","type":"link"}