Survey of the nutrient status ofPinus radiataseedlings and of soil properties in three Victorian nurseries

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Abstract
Results of a survey of the nutrient status of bare-rooted P. radiata seedlings raised at three Victorian nurseries between 1971 and 1975 and of some physical and chemical properties of the nursery soils are presented. A comparison of fertiliser input during each P. radiata crop with nutrient harvest in seedling tops showed that adjustments in the fertiliser regimes used in all nurseries were required. This was substantiated by the frequent occurrence of nutrient deficiencies in the seedlings and excessive levels of other nutrients in the tops. Appropriate fertiliser regimes should take account of both crop requirements and soil properties. Foliar and soil monitoring constitutes an objective method of identifying such a regime. The results highlighted the need for careful soil management in the nurseries to prevent deterioration in soil structure and ensure the efficient and continuous production of vigorous planting stock. The level of organic matter was shown to be sensitive to management and the study supports the current use of green manure crops to maintain or improve the organic matter levels in the soils.