Titlebook: Application of Electro-Ultrafiltration (EUF) in Agricultural Production; Proceedings of the F K. Németh Conference proceedings 1982 Martinu

NIP

A comparison of electro-ultrafiltration and quantity/intensity measurements of soil potassium with . Correlation coefficients between K uptake at the first cut were 0.80 for K., 0.88 for K. (the initially labile K derived from the Q/I curve), 0.92 for K. (desorbed by EUF in 35 min) and 0.97 for K. (1.0 . ammonium acetate extraction).

lattice

SLAG

Reproducibility of Ca, K, Na and P contents in the different EUF fractions,quantities of maximally desorbable K obtained by EUF and their half-time values are described. The calculations are based on the measurement of 288 individual values (EUF fractions) per nutrient. The following results were obtained:

arbovirus

使人入神

LOPE

记成蚂蚁

Rapid determination of EUF-extractable nitrogen and boron,e the EUF-N fractions are oxidized to NO.. The oxidation with peroxodisulfate is accelerated by ultraviolet (UV) radiation. This reduces the time of digestion to about 15 minutes..The contents of EUF-extractable N are on the average only between 2-8mg/100g soil. Their determination by the new proced

LATHE

Fixed NH4-N in relation to EUF-extractable K,soils were found to be rich in fixed ammonium and low in EUF-extractable potassium, while soils of basaltic origin were low in fixed ammonium and rich in EUF-extractable potassium. A negative correlation (. = 0.79*) was found between fixed NH.. and EUF-extractable soil K.. The content of fixed NH..

圣歌

Preliminary investigations on available and potentially available phosphorus using eleetro-ultrafilthe solubility and desorption rates of phosphorus at various soil depths throughout the cotton growing season using the EUF technique. The treatments included two applications of single superphosphate, equivalent to 0, 75, 150, 250 and 350 kg P.O./ha. There was no significant difference in seed cott

biopsy

Influence of soil type and potassium and magnesium fertilization on the release of potassium and mactro-Ultrafiltration (EUF) was determined in four Swedish soils..In all soils, with increasing potassium fertilization the amounts of K extracted by AL and desorbed by EUF increased, and the amounts of Mg-AL and Mg-EUF decreased. Magnesium fertilization had no significant effect on the K values but