G. A. Boertje

发表

Results of liquid feeding in the production of bedding plants

G. A. Boertje, 1980 .

FERTILISING STANDARDS FOR POTTING COMPOSTS BASED ON THE 1 : 1 ½ VOLUME EXTRACTION METHOD OF SOIL TESTING

G. A. Boertje, R. Bik, 1975 .

Substrates and the nutrition of Anthurium andreanum

G. A. Boertje, 1978 .

THE EFFECT OF THE NUTRIENT CONCENTRATION IN THE PROPAGATION OF TOMATOES AND CUCUMBERS ON ROCKWOOL

G. A. Boertje, 1986 .

CHEMICAL AND PHYSICAL CHARACTERISTICS OF PUMICE AS A GROWING MEDIUM

G. A. Boertje, 1995 .