Factors Affecting the Mobility and Plant Availability of Boron in Some Western Oregon Soils

Abstract

Surface soil from five diverse soil series was used to investigate the influence of soil properties and constituents on the mobility of boron (B) in a greenhouse study. Using pots 16.5 by 18.5 cm in diameter, from 13 to 61% of a 2.0 mg/kg liquid application of B was recovered in 25 cm of leachate. Recovery of B decreased with increased soil organic matter, clay, and free Fe and Al oxide content, but statistical separation of the effects of individual components was complicated by intercorrelations among these soil properties. No effect of soil pH on B mobility over a range of 5.4 to 7.5 was observed.Following leaching, the soils were cropped with New Zealand white clover (Trifolium repens L.). Yield differences were not correlated with hot water‐extractable B levels ranging from 0.47 to 2.34 µg/g or with B applied at planting. Plant B concentrations were high, ranging from 60 to 150 µg/g. As the range in hot water‐soluble B values encompassed current concepts of deficiency levels in western Oregon soils, the merits of investigating soil‐B critical levels under greenhouse conditions are questioned.A balance sheet approach indicated that soils have reserves of leachable and plant‐available B not detected in the conventional hot water extraction. The boron‐supplying power of these soils varied both within and among soil series and depended on soil properties and the amount of B in the soil system.

Total and water extractable boron in sediments from nine sites of the Western United States

“…The second conclusion is that different extraction ratios will obtain different data from the same sample. Similar differences have been observed in soil extraction studies (Okazaki and Chao, 1968;Parker and Gardner, 1982) and other soil data compiled in the literature (Swaine, 1955). This means that studies may be difficult to compare unless the extraction methods are also evaluated and relationships between data sets are determined.…”

“…At this ratio, extractable boron ranges from 0.5 ppm to 130 ppm (table 1) with a geometric mean of 3.8 ppm ( fig.3). In contrast to total boron, this mean is higher than observed for many western soils extracted by the same method (Ebens and Shaklette, 1982;Haas, 1944;Parker and Gardner, 1982;Whetstone and others, 1942). The distribution is positively skewed similar to that for total boron.…”

Boron nutrition of rice in different production systems. A review

“…Boron is mainly taken up by plant roots through mass flow especially when B concentrations in the soil solution are more than adequate. Applied B may undergo rapid leaching from the soil (Parker and Gardner 1982), or it moves from above the Ap horizon (plowed or disturbed soil) to the BA horizon (dominant properties of one horizon but some properties of other horizons) and Bt1 horizon (showing clay accumulation) (Pinyerd et al 1984). Under such conditions, some fertilizer B from the subsurface horizons is retrieved by deep roots, which leads to a long-term residual effect (Yang et al 2000).…”

Boro disponível e resposta da soja em latossolo vermelho-amarelo do Mato Grosso

“…De qualquer modo, os resultados obtidos com extração em água quente têm sido contraditórios. Robertson et al (1975) obtiveram correlação significativa entre o B no solo e na planta, mas Martens (1968) e Parker & Gardner (1982) observaram ausência de correlação entre B extraído pela água quente e o extraído pela planta ou produção.…”