Diagnostic leaf analysis for stone fruit. 2. Seasonal changes in the leaf composition of peach

1974 ◽  
Vol 14 (71) ◽  
pp. 822 ◽  
Author(s):  
DR Leece ◽  
AR Gilmour
Keyword(s):  
Seasonal Changes ◽  
New South ◽  
Element Composition ◽  
Rate Of Change ◽  
Correction Factors ◽  
Nutrient Element ◽  
Composition Data ◽  
Leaf Analysis ◽  
South Wales ◽  
Leaf Composition

Changes in the nutrient-element composition of leaves of peach cvs. Golden Queen, Gaum6, and Halehaven were measured monthly during the 1971 -72 and 1972-73 seasons in New South Wales. For all cultivars, the rate of change of leaf composition was least during January and February. Thus leaf composition standards should be based on January-February samples and diagnostic sampling should be confined to this period where possible. Correction factors for adjusting the composition November, December and March samples back to January 31 levels were calculated from polynomials with time fitted to the leaf composition data.

Diagnostic leaf analysis for stone fruit. 6. Apricot

1975 ◽  
Vol 15 (72) ◽  
pp. 123 ◽  
Author(s):  
DR Leece ◽  
Bvan den Ende
Keyword(s):  
New South ◽  
New South Wales ◽  
Element Composition ◽  
Rate Of Change ◽  
Correction Factors ◽  
Nutrient Element ◽  
Composition Data ◽  
Leaf Analysis ◽  
South Wales ◽  
Leaf Composition

Changes in the nutrient-element composition of leaves of 'Trevatt' apricot were measured monthly during the 1971-72 and 1972-73 seasons in New South Wales. The rate of change of leaf composition was least during January-February. Thus, leaf composition standards should be based on January- February samples and diagnostic sampling should be confined to this period where possible. Correction factors for adjusting the composition of early or late samples back to January 31 levels, were calculated from polynomials with time fitted to the leaf composition data. A survey of the leaf composition of well-managed 'Trevatt' apricot orchards was conducted each January from 1971 to 1973 in New South Wales and Victoria. Percentages of orchards classified as low to deficient (-), and high to excess (+) for various nutrients were as follows : New South Wales (averages of 1971 to 1973) N -41 ; P +37; K +49; Mg +56; Fe +1 9 ; Zn -18. Victoria (averages of 1972 and 1973) N -21 and +32; K +10; Fe -35; Mn +17; Zn -20.

Diagnostic leaf analysis for stone fruit. 5. Sweet cherry

1975 ◽  
Vol 15 (72) ◽  
pp. 118 ◽  
Author(s):  
DR Leece
Keyword(s):  
Sweet Cherry ◽  
New South ◽  
Element Composition ◽  
Rate Of Change ◽  
Correction Factors ◽  
Nutrient Element ◽  
Composition Data ◽  
Leaf Analysis ◽  
South Wales ◽  
Leaf Composition

Changes in the nutrient-element composition of leaves of 'St. Margaret' cherry were measured monthly during the 1971-72 and 1972-73 seasons in New South Wales. The rate of change of leaf composition was least during January-February. Thus, leaf composition standards should be based on January- February samples and diagnostic sampling should be confined to this period where possible. Correction factors for adjusting the composition of early or late samples back to January 31 levels were calculated from polynomials with time fitted to the leaf composition data. A survey of the leaf composition of well-managed orchards was conducted each January from 1971 to 1973. Nutrients were found to be low or deficient in the following percentages of the orchards surveyed : nitrogen 37; phosphorus 31 ; potassium 37; calcium 25; iron 43; and zinc 62. High levels of copper were found in 9 per cent and of manganese in 15 per cent of the orchards.

Diagnostic leaf analysis for stone fruit. 4. Plum

1975 ◽  
Vol 15 (72) ◽  
pp. 112 ◽  
Author(s):  
DR Leece
Keyword(s):  
New South ◽  
New South Wales ◽  
Rate Of Change ◽  
Stone Fruit ◽  
Correction Factors ◽  
Prunus Domestica ◽  
Composition Data ◽  
Leaf Analysis ◽  
South Wales ◽  
Leaf Composition

Changes in the leaf composition of Prunus domestica cv. D'Agen and P. salicina cv. Mariposa, were measured monthly during the 1971 -72 and 1972-73 seasons in New South Wales. The rate of change of leaf composition was least during January-February for D'Agen and during December-February for Mariposa. Thus, leaf composition standards should be based on January-February samples for D'Agen and December- February samples for Mariposa, and diagnostic sampling should be confined to these periods where possible. Correction factors for adjusting the composition of early or late samples back to January 31 levels, were calculated for D'Agen from polynomials with time fitted to the leaf composition data. A survey of the leaf composition of well-managed orchards was also conducted each January from 1971 to 1973. Of the European prune orchards surveyed, 51 per cent were low in nitrogen, 37 per cent were low in phosphorus, 28 per cent were low in iron, 25 per cent were high in copper, 10 per cent were high in manganese and 23 per cent were high in boron. Of the Japanese plum orchards surveyed, 33 per cent were high in nitrogen, 14 per cent were high in potassium, 22 per cent were low in calcium, 18 per cent were high in copper and 15 per cent were high in manganese.

Leaf analysis for pear: development of standards and the nutritional status of orchards in the Goulburn Valley and Murrumbidgee Irrigation Areas

1975 ◽  
Vol 15 (72) ◽  
pp. 129 ◽  
Author(s):  
den Ende B van ◽  
DR Leece
Keyword(s):  
Nutritional Status ◽  
New South ◽  
Yield Data ◽  
Leaf Analysis ◽  
South Wales ◽  
High Production ◽  
Pear Trees ◽  
Leaf Composition ◽  
Salt Toxicity ◽  
Good Agreement

Leaf composition standards for pear trees were formulated from the literature then evaluated in the Goulburn Valley, Victoria by surveying the leaf composition of high-production orchards for two seasons (1971-72 and 1972-73). Good agreement was found between the standards and orchard leaf composition although the calcium standards required slight amendment. A concurrent survey of orchards showing symptoms of salt toxicity showed that sodium and chloride levels previously considered safe were in fact toxic and the standards were amended accordingly. The revised standards were used to evaluate the nutritional status of young and older pear blocks in the Goulburn Valley and pear blocks in the Murrumbidgee Irrigation Areas (MIA), New South Wales. The findings for Goulburn Valley blocks were confirmed by multiple regression analysis of leaf composition and yield data.

Diagnostic leaf analysis for stone fruit. 3. Nutritional status of peach orchards

1974 ◽  
Vol 14 (71) ◽  
pp. 828 ◽  
Author(s):  
DR Leece ◽  
B Barkus
Keyword(s):  
Nutritional Status ◽  
New South ◽  
New South Wales ◽  
Considerable Improvement ◽  
Stone Fruit ◽  
Leaf Analysis ◽  
South Wales ◽  
Similar Survey ◽  
Leaf Composition

A three-year survey of the leaf composition of well-managed peach orchards was conducted in New South Wales each January from 1971 to 1973. Of the canning peach orchards surveyed, 47 per cent were deficient or low in nitrogen, 20 per cent were high in potassium, 12 per cent were low in manganese and 6 per cent were high in boron. This represented a considerable improvement over a similar survey in 1966 when comparable figures were nitrogen 83, potassium 84, manganese 33, and boron 34. Of the dessert peach orchards surveyed, 37 per cent were deficient or low in nitrogen, 36 per cent were low in potassium and 32 per cent were low in iron. A few orchards were low in manganese and zinc.

The effect of season, stage of plant growth and leaf position on nutrient concentration in banana leaves on a krasnozem in New South Wales

1974 ◽  
Vol 14 (66) ◽  
pp. 112 ◽  
Author(s):  
DW Turner ◽  
B Barkus
Keyword(s):  
Plant Growth ◽  
Nutrient Concentration ◽  
New South ◽  
New South Wales ◽  
Nutrient Concentrations ◽  
Leaf Position ◽  
Leaf Analysis ◽  
South Wales ◽  
Banana Leaves ◽  
Cu And Zn

At Alstonville, New South Wales, leaf position had a greater effect than season on the nutrient concentrations of N, P, K, Ca, Mn, Cu, and Zn in the laminae of Williams bananas growing on a krasnozem soil and sampled over a 4-year period. However, season was more important for Mg. The effect of stage of plant growth was significant but much smaller than the other influences. When sampling for leaf analysis, leaf position and plant age can be standardised, but a major problem in this investigation was unpredictable, significant changes in nutrient composition from one sampling date to another. If these results are true for other soils. the data do not allow critical levels to be applied.

Ecology of the Little Black Cormorant, Phalacrocorax sulcirostris, and Little Pied Cormorant, P. melanoleucos, in Inland New South Wales I. Food and Feeding Habits.

1979 ◽  
Vol 6 (1) ◽  
pp. 79 ◽  
Author(s):  
B Miller
Keyword(s):  
Common Carp ◽  
Seasonal Changes ◽  
Prey Availability ◽  
New South ◽  
Feeding Habits ◽  
New South Wales ◽  
Live Weight ◽  
Exotic Fish ◽  
South Wales ◽  
Food And Feeding

The food and feeding habits of two species of cormorant were studied on a group of freshwater lakes in inland New South Wales. P. sulcirostris fed mainly on exotic fish (69% of live weight of prey), captured while fishing communally in the deeper waters. P. melanoleucos fed mainly on native decapod crustaceans (60% of prey) captured while fishing individually in the shallow parts of the lakes, and in nearby billabongs and farm dams. P. sulcirostris took larger common carp Carassius auratus, redfin Perca fluviatilis and yabby Cherax destructor than its congener. Seasonal changes in the diet of P. sulcirostris were similar in each year; its major prey, common carp and redfin, were least available during winter and spring, as fry grew too large to be captured and swallowed. Changes in diet of P. melanoleucos were irregular, as the availability of yabby, its major prey, was influenced by the turbidity, level and temperature of water. Seasonal changes in diets of both cormorants were attributed to changes in prey availability, and not changes in food preference. Food of nestlings sometimes differed from that of adults.

Seasonal changes in Ectoparasite infection of juvenile Yellowfin Bream, Acanthopagrus australis, (Gunther) (Pisces: Sparidae). from a small estuary in Northern NSW

1990 ◽  
Vol 41 (3) ◽  
pp. 411 ◽  
Author(s):  
FR Roubal
Keyword(s):  
Seasonal Changes ◽  
New South ◽  
New South Wales ◽  
Late Summer ◽  
The Other ◽  
Copepod Species ◽  
Seasonal Prevalence ◽  
Intensity Of Infection ◽  
Annual Cycles ◽  
South Wales

Seven monogenean, 1 digenean and 9 copepod species of ectoparasite were found on 179 juvenile Acanthopagrus australis collected bimonthly over two 12-month periods from a small estuary at Red Rock in northern New South Wales. The monogenean Allomurraytrema spari and the copepod Alella macrotrachelus showed a consistent cycle of spring-summer high and late summer-autumn low in prevalence and intensity of infection, whereas the digenean Prototransversotrema steeri was present only in winter. The monogenean Haliotrema spariensis was highly prevalent year-round, but other monogeneans were inconsistent in seasonal prevalence and intensity. The copepods Paraergasilus acanthopagri and Dermoergasilus acanthopagri showed inconsistent annual cycles, but their fluctuations in prevalence and intensity were nearly identical. The other species of ectoparasite had no consistent cycles or were rarely found. Temperature does not appear to directly regulate the abundance of ectoparasites on juvenile Acanthopagrus australis in Red Rock estuary.

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