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- W2336007387 abstract "Using agronomic data from a soil productivity experiment on ploughed grassland, aerobic mineral isable nitrogen, A min N, and barium-hydroxide extractable 'glucose* gave significant correlations with grain yield and nitrogen uptake. Anaerobic mineralisable nitrogen, organic carbon, organic nitrogen, carbon and nitrogen released by partial hydrolysis and alkaline-permanganate oxidisable nitrogen did not correlate significantly with cropping data. Although 'glucose,' hydrolysable carbon and alkaline-permanganate oxidisable nitrogen corre lated well with A min N, total organic carbon did not. The proportion of organic carbon hydrolysed decreased with increasing soil organic carbon content, r = ?0.66**, 15 df. A direct effect of crop rotation was noted, since Amin N was 26% higher after 2 years* cereals than after 2 years' root crops. There was no significant difference in Amin N between treatments or between selected sites after 3 years' cropping. However, when 1 % ground straw was incorporated prior to incubation significant differences showed up in both instances. There was a progressive decrease in mineralisation and an eventual immobilisation where nitrogen had been applied at the highest rates. There was also a difference between sites, which was hot related to the variation in mineral nitrogen or 'glucose.* The relationship between Amin N and mineral nitrogen and 'glucose' varied with time and crop sequence. After 3 years' arable cropping there was no significant correlation between these par ameters." @default.
- W2336007387 created "2016-06-24" @default.
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- W2336007387 date "2016-01-01" @default.
- W2336007387 modified "2023-09-27" @default.
- W2336007387 title "SOME^SOIL AND CROPPING FACTORS ASSOCIATED WITH MINERALISATION AND AVAILABILITY OF NITROGEN IN FIELD EXPERIMENTS" @default.
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