Slovenian rules and regulation concerning fertilization are briefly presented. Current use of fertilizers, manures and compost, as well as nitrogen and humus balances in Slovene agriculture, and soil ...supply level with phosphorus and potassium dependent on various soils uses is given and critically stressed. Target values and fertilization norms for major plant nutrients as well as basic set of parameters and methods for national soil fertility- and fertilization control are proposed.
Electrophysiologic studies, including intra‐atrial recordings and atrial stimulation, were performed in two patients with suspected sick sinus syndrome. Premature atrial stimuli induced atrial ...flutter in both patients. The arrhythmia was concealed, i.e., it was recordable only by intracavitary electrogram and invisible on surface electrocardiogram. In one case, simultaneous atrial fibrillation could be recorded in a segment of the right atrium. In this patient, the rhythm on the surface electrocardiogram changed during the study to “upper nodai” rhythm, though the atrial electrogram showed continuation of A waves at the same rate as before during sinus rhythm. It seems that atrial changes, which are frequently encountered in sick sinus syndrome, are a predisposing factor for spontaneous or inducible concealed atrial arrhythmias. (PACE, Vol. 5, July‐August, 1982)
