P. Csatho et al., NEW ENVIRONMENTALLY FRIENDLY FERTILIZER ADVISORY SYSTEM, BASED ON THEDATA SET OF THE HUNGARIAN LONG-TERM FIELD TRIALS SET-UP BETWEEN 1960 AND 1995, Communications in soil science and plant analysis, 29(11-14), 1998, pp. 2161-2174
Following the 25-year intensive fertilisation practice in the country,
two-thirds of Hungarian soils became well or very well supplied with
phosphorus (P) and potassium (K). As a consequence of both political a
nd ecological changes in the late 1980s and early 1990s, fertiliser su
bsidies were withdrawn, and nitrogen (N) use has dropped to one-fifth,
one-third, P and K use to one twenty-fifth, one-twentieth of the amou
nts used in the early-mid 1980s. An enormous demand has risen for a ne
w, cost saving, and environmentally friendly fertiliser recommendation
system. The new system based on the results of the published long-ter
m field trial data in the period of 1960-1995 faces the new challenges
.