Author:
Z. Izsáki Tessedik Sámuel College Faculty of Agricultural Water and Environmental Management P.O. Box 3 H-5541 Szarvas Hungary

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In order to elaborate site-specific, environmentally sound fertiliser recommendations aimed at achieving an economic yield level in maize, the N and P supplies of the soil, the N and P effects detectable in the yield, and the limit values for N and P supply levels were investigated in a ten-year mineral fertilisation experiment set up on chernozem meadow soil.Over the average of ten years, this chernozem meadow soil, which had a humus content of 2.8–3.2%, gave a grain yield of 6.10 t ha −1 without N fertiliser, the relative yield was 79% and N fertilisation gave a yield surplus of 1.35 t ha −1 . The economic yield level was achieved when the NO 3 -N content of the upper 0–60 cm soil layer was 100–110 kg ha −1 prior to sowing. The mineral N content of the soil is a better indicator of the soil N supply level and of the N fertiliser requirements of maize than the humus content. On this acidic, clay loam soil, which had a P supply level of 120–160 mg kg −1 AL-P 2 O 5 without P fertilisation, the relative yield was 93%, averaged over 10 years, and the yield surplus 0.2 t ha −1 . A P effect was only detected in approximately 50% of the years, when the economic yield level was achieved at an AL-P 2 O 5 supply level of 130–170 mg kg −1 . On this acidic, clay loam, chernozem meadow soil, a limit value of 120–170 mg kg −1 AL-P 2 O 5 represented a good supply level.

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Cereal Research Communications
Language English
Size A4
Year of
Foundation
1973
Volumes
per Year
1
Issues
per Year
4
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0133-3720 (Print)
ISSN 1788-9170 (Online)