ACTA AGRONOMICA VOLUME 41. (A MTA AGRÁRTUDOMÁNYI KÖZLEMÉNYEI, 1992)

1992 / 1-2. szám

SOIL SCIENCE ANI) AGROCHEMISTRY CONTENTS Dangers of arsenic drinking and irrigation water to plants and humans. Antagonism of arsenic and magnesium A. S. Kiss, M. Oncsik, J. Dombovdri, S. Veres and 0. Ács 3 PLANT PHYSIOLOGY AND AGROCHEMISTRY Self-and cross- compatibility of Hungarian sour cherry cultivars J. Nyéki, Z. Szabó and S. S. Salgim 11 Importance of nectaries in the flower structure of plum cultivars D. Surdnyi and Zsuzsanna Orosz-Kovács 15 A study of pollen viability after storage and the effect of some growth regulators on in vitro pollen germination and pollen tube growth in Cicer A. V. S. R. Swamy and V. K. Khanna 25 Pollen tube studies in inter-varietal crosses of chickpea (Cicer arietinum L.) A. V. S. R. Swamy and V. K. Khanna 33 Occurrence and physiological role of benzoxazinones and their dérivâtes. I. Cytokinin activity of 6-methoxy-benzoxazolinone M. Pethô and Z. Dinya 39 Occurrence and physiological role of benzoxazinones and their dérivâtes. II. Decomposition of 7-methoxy-benzoxazinone and change in its physiological activity M. Pethô ' 49 Occurrence and physiological role of benzoxazinones and their dérivâtes. III. Possible role of 7-methoxy-benzoxazinone in the iron uptake of maize M. Pethô' 57 Effect of heating and ultra violet light on the formation of free fatty acids in the rice bran oil S. A. Taha, R. A. El-Massry and M. M. Afifi 65 Fatty acids and unsaponifiable matter composition of rice oil and rice germ oil as well as their dewaxed residue R. A. El-Massry, S.A. Taha and M. M. Afifi 69 Study on the root development of asparagus (Asparagus officinalis L.) Edit Fehér-Barvinkó 75 Estimates of genetic parameters for yield of six maize inbreds and their crosses in low and high plant densities M. Odiemah 85 1

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