FERTILISER RECOMMENDATIONS
Figs (Ficus carica) can produce good crops even under fairly low fertility levels. Soil cultivation should be only superficial otherwise feeding roots will be damaged. Trees are very sensitive to dry soil conditions and regular supplies of water ... [... more]
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Guavas
Guavas (Psidium gujava) can be successfully grown in a wide range of soils, but they are susceptible to wet feet. Adequate moisture must be supplied, particularly prior to harvest. Young trees should be supplied with 150-500 g 6:6:5 NPK balanced ... [... more]
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Casimiroas (White Sapote)
The casimiroa (Casimiroa edulis) appears to grow best on well drained light soils supplemented with large amounts of organic matter. A good, consistent supply of water is important. In the absence of other information, a citrus fertiliser ... [... more]
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LEGUMINOSEAE (broad beans, peas, French beans, runner beans)
LEGUMINOSEAE (broad beans, peas, French beans, runner beans) CRUCIFERAE (cabbage, cauliflower, brussel sprouts, turnip, swede, radish) CUCURBITACEAE (squash, pumpkins, melons, cucumbers, courgettes) Nitrogen requirements are the total requirement ... [... more]
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TESTING SOIL-LESS MEDIA
The nutrition of these plants is based on the use of slow release fertilisers. Liquid fertilisers are generally applied only occasionally but under conditions where leaching may occur they may need to be applied more frequently. It is important ... [... more]
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Generalised Guide To Nutrient Deficiency Symptoms - Part 1
Plants much smaller than normal, leaves light green, lower leaves yellow, leaf senescence accelerated. Decreased plant size, plants dark green, often red or purple colours appearing, lower leaves yellow. Pale brown to black leaf scorch, preceded ... [... more]
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WJW Wilton
Apples (Malus domestia) and European pears (Pyrus communis) are grown throughout NZ under a wide range of climatic conditions and soil types. Recently, another pip fruit, the Asian or Japanese pear (Pyrus pyrifolia) has been introduced and is ... [... more]
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Grant Thorpe
In general, mature cropping avocado trees (Persea americana) have a relatively low demand for nutrients. N, Zn and B are considered to be the minerals most limiting to production. N is an important management tool that can be used to alleviate ... [... more]
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Persimmon (Kaki)
Persimmon (Diospyros kaki) is an emerging commercial fruit crop in New Zealand. Orchards predominantly consist of non-astringent cultivars, such as Fuyu and Matsumoto Wase Fuyu. Current nutritional recommendations are based on Japanese and New ... [... more]
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Time of Sampling
Diagnostic Standards For Plant Nutrition Concentrations In Vegetables Micronutrients: Normal ranges are (ppm): Mn, 50-500; Fe, 50-500; Zn, 30-100; Cu, 5-30; B, 40-100. Soil: extractant ratio 4.4:20 (v/v) for Ca, K, and Mg, 1:20 (v/v) for ... [... more]
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Grapevines
Among horticultural plants, grapevines are acknowledged as having less exacting nutritional requirements. They can be grown on a wide range of soil types, but nutritional problems show most commonly on lighter textured soils. Most established ... [... more]
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Boysenberries, Youngberries and Blackberries
Although the bramble group (Rubus hybrids) constitutes a significant proportion of the national berryfruit area, surprisingly little is known about their nutritional requirements. Virtually no controlled work has been carried out in New Zealand ... [... more]
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