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L. REICHBUCH şi W. C(,PJNY
OPTIMIZATION OF POTATO CROP FERTILIZATION ON SUCEAVA
PLATEAU UNDERA CROP ROTATION OF FOUR YEARS
Summary
Experiments of seven ye'ars (1972-1978) at Suceava ta imagine a zonal model
for fertilization optimi:ăing for every plot oovered by the potato crop were carried
ono 820 experimental plots were charaderized for P 2 0;"i. K 2 0 and Ca (soluble in
amonium lactJate pH=3.7), changeable H (in natritim ''aC'etiate, pH=8.36), total humus
Ct, tuber yield, rates of NP, climatic indices (rainfalls and temperature). The
equations underline the known phenomenon of the big P-efficacy when there is
a low P content in the soH and big content of ('hangeable H. The main fertilizer
remains the Nitrogen (economic optimum of 160 kg/ha N). For Desireet tuber yields
of 36-40 t/ha can be obtained with NI60P(~1-12:;'
ZUR OPTIMIERUNG DER DONGUNG FOR DEN KARTOFt: