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e f maas
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Les milieux de culture artificiels en horticulture
E. F. Maas · Direction générale des communications, Agriculture Canada
20 sayfa · 1981
Plantes / Terre d'empotage / Milieux nutritifs artificiels / Potting soils / Artificial Plant growing media
Sarawak land capability classification and evaluation for agricultural crops
E. F. Maas · Soils Division, Research Branch, Dept. of Agriculture, Sarawak
69 sayfa · 1979
Land capability for agriculture / Soils