Boron Determination in Soils and Plants

Abstract

In several cases the method has been applied to milk products which were also assayed for riboflavin by means of chicks. The chick assays upon six samples gave an average value of 21.2 micrograms per gram. An average value of 21.5 micrograms per gram was obtained by the photometric test. The method presented in this paper is preferred because of its rapidity, and because biological assays may be complicated at times by the presence or absence of nutritional factors which are not as yet clearly defined.

Boro total e solúvel e suas relações com alguns atributos dos solos do estado do Ceará

“…Em seguida, adicionaram-se três gotas de CaCl 2 0,1 mol L -1 e filtrou-se o material (Berger & Truog, 1939;Bataglia & Raij, 1990 Boro solúvel em HCl 0,05 mol L -1 (B-HCl): foram pesados 10 g de solo e adicionados 20 mL de solução extratora, seguindo-se de cinco minutos de agitação e filtragem (Ponnamperuma et al, 1981).…”

“…Esse fato tem levado ao desenvolvimento de diversos métodos de extração para o diagnóstico de níveis de deficiência ou suficiência de B nos solos. O método de extração com água quente (Berger & Truog, 1939), que extrai menos do 5% do B total do solo (Berger & Truog, 1940), é um dos mais amplamente difundidos e suas determinações aceitas como índice de disponibilidade de B no solo para a maioria das plantas. Na tentativa de simplificar as análises e facilitar o seu uso em condições de rotina, têm sido empregados outros extratores como: soluções diluídas de ácidos (Ponnamperuma et al, 1981;Renan & Gupta, 1991), soluções salinas de CaCl 2 (Jeffery & McCallum, 1988;Spouncer et al, 1992), soluções complexantes como manitol + CaCl 2 (Cartwright et al, 1983) e AB-DTPA (Gestring & Soltanpour, 1984.…”

Impact of Potassium-Boron Interaction on Leaf Nutrient Content and Nut Setting of Coconut

“…The leaf samples were collected from the index leaf (14 th frond) for analysis before application of the fertilizers and subsequently at 6 and 12 months after application for the determination of boron and potassium content of leaf (Reuter and Robinson, 1997). K content of leaf digest was determined by flame photometer as described by Muhr et al, (1965) and leaf B content was analysed by Berger and Truog (1939). The number of female flowers per spadix was counted at the time of opening of spadix and button stage of the nuts of well tagged and labelled palms.…”

Chemical Characterization of Soils under Floriculture Crops in Selected Villages of Pune and Satara Districts of Maharashtra, India

“…Available boron was determined using hot water extraction method as given by Berger and Truog (1939) which has been modified by Gupta (1967).…”