Leaf analysis survey of Pullar's Cling peach trees in northern Victoria: correlations between leaf nutrient status and tree performance in two years

1972 ◽  
Vol 12 (54) ◽  
pp. 103
Author(s):  
BK Taylor ◽  
Bvan den Ende
Keyword(s):  
Regression Analysis ◽  
Nutrient Status ◽  
Nitrogen Status ◽  
Irrigation Area ◽  
Leaf Analysis ◽  
Nitrogenous Fertilizer ◽  
Fruit Growing ◽  
Peach Trees ◽  
Low Nitrogen ◽  
Tree Performance

The N, P, K, Ca, and Mg contents of mid-shoot leaves of ten-year-old Pullar's Cling peach trees in the Goulburn Valley Irrigation Area, and the associated Murray Valley Irrigation Area were surveyed in 1964 and 1965. Leaves were sampled in mid summer from healthy trees in 73 orchards distributed over five major fruit-growing districts, and the results were related to tree yield (fruit number,) and vigour (butt circumference). Multiple regression analysis of the survey data showed that between 30 and 40 per cent of the total variation in tree yield over the two-year period was accounted for by variation in tree nutrient status. Such results clearly indicate the degree of influence that nutrition can play in the performance of mature peach trees in the field. As judged by published leaf nutrient standards for peach trees, about two-thirds of the peach orchards were of low nitrogen status in both seasons and this situation was reflected in tree yield. The low nitrogen status of the trees overall was a reflection of the low average amounts of nitrogenous fertilizer applied per tree per year. One-fifth of the orchards were of low phosphate status, but tree performance was not adversely affected as a result. In single years also, significant correlations were recorded between leaf K, leaf Ca, and tree performance, but, overall, these results were difficult to interpret meaningfully.

Effect of environment and plant phenology on prediction of plant nutrient deficiency using leaf analysis in Leucaena leucocephala

2011 ◽  
Vol 62 (3) ◽  
pp. 248 ◽  
Author(s):  
Alejandro Radrizzani ◽  
Scott A. Dalzell ◽  
H. Max Shelton
Keyword(s):  
Ambient Temperature ◽  
Leucaena Leucocephala ◽  
Nutrient Status ◽  
Plant Phenology ◽  
Chronological Age ◽  
Nutrient Concentrations ◽  
Strongly Correlated ◽  
Plant Nutrient ◽  
Leaf Analysis ◽  
Stage Of Development

Plant analysis is an important tool for predicting plant nutrient imbalances associated with variable soil fertility and it is usually based on analysis of index plant parts such as the youngest fully expanded leaf (YFEL). Recent use of the YFEL to diagnose plant nutrient status of Leucaena leucocephala subsp. glabrata (leucaena) pastures has given unreliable results. Two field trials, one irrigated and one dryland, were conducted in subtropical Queensland to investigate the effect of index leaf selection, plant phenology and environmental factors (ambient temperature and water stress) on leaf nutrient concentrations. The YFEL was identified as the best plant part to sample because it was readily identifiable and had consistent concentrations of most nutrients compared to older and younger leaves provided specific conditions were met when sampling. At both sites there was significant (P < 0.05) seasonal variation in nutrient concentrations in leucaena YFEL, which was poorly correlated with ambient temperature but strongly correlated with rainfall in the preceding 28 days and chronological age of YFEL. Advancing plant phenological stage of development increased the chronological age of YFEL from 12 to 73 days under irrigation since no new leaves were produced for prolonged periods during pod filling and maturation. Similarly, YFEL could be 146 days old on plants in vegetative stages of growth under prolonged drought in dryland conditions. YFEL of ~21 days of age or less were found to be optimal for analysis. Furthermore, as the calcium (Ca) concentration of YFEL was strongly correlated with leaf chronological age, this parameter could be used to determine the age of the leaves sampled. YFEL with Ca concentrations >0.75% DM were likely to be >21 days in age and should not be used for the diagnosis of plant nutrient status. It was concluded that leaf analysis could be used to confidently assess leucaena plant nutrient status provided the YFEL were sampled from actively growing plants in vegetative development that had received rainfall/irrigation in the preceding 28 days and were <21 days of age.

Response of newly planted peach and apple trees to superphosphate

1975 ◽  
Vol 26 (3) ◽  
pp. 521 ◽  
Author(s):  
BK Taylor
Keyword(s):  
Tree Growth ◽  
Phosphate Fertilizer ◽  
Fruit Trees ◽  
Yield Response ◽  
Apple Trees ◽  
Leaf Analysis ◽  
Major Interest ◽  
Marked Decline ◽  
One Year ◽  
Peach Trees

The response of peach and apple trees to added superphosphate was recorded both in the nursery and later in the orchard after transplanting. The peach and apple trees responded positively to phosphate applications in both the nursery and the orchard despite the initial presence of medium to high phosphate levels in the soils. Of major interest, too, was the absence of a consistent interaction between the phosphate treatments applied in the separate years. This suggested that the trees could not accumulate enough phosphorus in any one year to influence their response to further phosphate. Leaf analysis showed two important effects in relation to the phosphate treatments. Firstly, since high rates of application of fertilizer led to only small increases in the levels of phosphorus in the leaves, tree growth rate and phosphate absorption rate are apparently closely coupled. Secondly, the deliberate withholding of phosphate fertilizer from all trees in the fourth season led to a marked decline in the levels of phosphorus in the leaves of both peach and apple, which suggested that phosphate fertilizer should be applied annually to young fruit trees. With apple, but not peach, increasing the rate of phosphate applied in the third season stimulated the number of flower buds initiated, but this effect was not simply the result of increased vegetative growth. On the other hand, phosphate application to the peach trees in the orchard resulted in a positive fruit set and yield response in the absence of any tree growth response.

Studies on some neutral red duplex soils (Dr 2.12) in north-eastern Queensland. 1. Morphological and chemical characteristics

1971 ◽  
Vol 11 (50) ◽  
pp. 328
Author(s):  
BJ Crack ◽  
RF Isbell
Keyword(s):  
Chemical Properties ◽  
Summer Rainfall ◽  
Nutrient Status ◽  
Neutral Red ◽  
Available Phosphorus ◽  
Red Clay ◽  
High Accumulation ◽  
North Eastern ◽  
Low Nitrogen

Morphological and chemical data are presented for neutral red duplex soils (Dr2.12) derived from granodiorite and diorite in north-eastern Queensland under a strongly seasonal summer rainfall. Mean annual totals range from about 24 inches (610 mm) to nearly 40 inches (1000 mm). The soils have slightly acid loamy A, horizons which overlie structured red clay B horizons of slightly acid to neutral reaction. C horizons containing much weathered rock occur at 50-70 cm and continue to depths exceeding two metres. Profiles show a consistent trend for many chemical properties ; a particular feature being the relatively high accumulation of phosphorus in the C horizon. Certain chemical analyses of surface soils are sufficiently consistent within and between sites to provide a broad regional characterization of plant nutrient status. The soils of the Charters Towers region have low nitrogen, organic carbon, and available phosphorus contents but potassium levels are moderate. Home Hill-Bowen soils are more variable but indicate generally higher fertility levels.

scholarly journals Overexpression of GmAAP6a enhances tolerance to low nitrogen and improves seed nitrogen status by optimizing amino acid partitioning in soybean

2020 ◽  
Vol 18 (8) ◽  
pp. 1749-1762 ◽  
Author(s):  
Sheng Liu ◽  
Dan Wang ◽  
Yuanyuan Mei ◽  
Tongmei Xia ◽  
Wei Xu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Nitrogen Status ◽  
Low Nitrogen

Leaf nitrogen as a guide for fertilising macadamia

1997 ◽  
Vol 37 (5) ◽  
pp. 599 ◽  
Author(s):  
R. A. Stephenson ◽  
E. C. Gallagher ◽  
V. J. Doogan
Keyword(s):  
Nitrogen Nutrition ◽  
Current Trend ◽  
Leaf Nitrogen ◽  
Nitrogen Status ◽  
Oil Accumulation ◽  
Inflorescence Development ◽  
Experimental Block ◽  
High Yields ◽  
The Relationship ◽  
Low Nitrogen

Summary. Despite the lack of evidence for a critical level of leaf nitrogen in macadamia, fertiliser management has been largely based on tentative standards for high yielding trees. Trees on a lower plane of nitrogen nutrition, however, produced higher yields of good quality nuts. This study was therefore carried out to establish the relationship between yield and nitrogen status of trees. Three rates of nitrogen fertiliser (0.5, 1.5 and 2.5 kg urea/tree . year; 230, 690 and 1150 g nitrogen respectively) were applied to macadamia trees in 1 of 5 application strategies: 1 application in April (floral initiation); 2 applications, one in April and one in June (inflorescence development); 3 applications, April, June and November (rapid nut growth and premature nut drop); 4 applications, April, June, November and January (oil accumulation); and 12 monthly split applications. Multiple applications were all equal in size. The association between high yields and low nitrogen status was confirmed. In some, but not all, years, yield was negatively correlated with leaf nitrogen, accounting for 47 and 59% of the variation in yield of commercially acceptable nuts (>19 mm diameter) in 1991 and 1993, respectively. It is therefore recommended that the standard for leaf nitrogen in macadamia be lowered from 1.4–1.5 to 1.3% under Australian conditions. These results raise concerns at the current trend for leaf nitrogen to be as high as 1.8%. It would be prudent to cease nitrogen applications on at least a small experimental block until leaf nitrogen declined to 1.3% and then maintain this level for at least 3 years and monitor yields.

Diagnostic leaf analysis for stone fruit. 7. Effects of fertilizer nitrogen, phosphorus, and potassium on leaf composition of peach

1976 ◽  
Vol 16 (82) ◽  
pp. 775 ◽  
Author(s):  
DR Leece
Keyword(s):  
Sandy Loam ◽  
Practical Importance ◽  
Phosphorus Concentration ◽  
Fertilizer Nitrogen ◽  
Leaf Analysis ◽  
Loam Soil ◽  
Phosphorus And Potassium ◽  
Peach Trees ◽  
Leaf Composition ◽  
Nitrogen Phosphorus

The effects of fertilizer nitrogen, phosphorus and potassium on the leaf composition of Halehaven peach trees were measured for two seasons in a factorial experiment conducted in a block of mature, bearing trees on a sandy loam soil. Fertilizer nitrogen increased the leaf concentrations of nitrogen, iron, copper, manganese and zinc, and decreased the concentrations of potassium, calcium, magnesium and boron. Phosphorus concentration was not changed. Effects of fertilizer phosphorus and potassium on leaf composition were very slight and would not have been of practical importance in diagnosis by leaf analysis.

scholarly journals The influence of severe shoot pruning on growth, carbon and nitrogen status in young peach trees (Prunus persica)

2002 ◽  
Vol 22 (18) ◽  
pp. 1289-1296 ◽  
Author(s):  
S. Mediene ◽  
M. O. Jordan ◽  
L. Pages ◽  
J. Lebot ◽  
S. Adamowicz
Keyword(s):  
Prunus Persica ◽  
Nitrogen Status ◽  
Carbon And Nitrogen ◽  
Peach Trees

Effects of low nitrogen supply on relationships between photosynthesis and nitrogen status at different leaf position in wheat seedlings

2013 ◽  
Vol 70 (3) ◽  
pp. 257-263 ◽  
Author(s):  
Dandan Li ◽  
Mengyu Tian ◽  
Jian Cai ◽  
Dong Jiang ◽  
Weixing Cao ◽  
...  
Keyword(s):  
Nitrogen Supply ◽  
Leaf Position ◽  
Nitrogen Status ◽  
Wheat Seedlings ◽  
Low Nitrogen

scholarly journals Leaf Mineral Composition of Coffee Infected by a Hemileia vastatrix Fungus in Bondowoso, East Java

2019 ◽  
Vol 35 (1) ◽  
pp. 12-21
Author(s):  
Erwin Prastowo ◽  
Novie Pranata Erdiansyah ◽  
Rina Arimarsetiowati
Keyword(s):  
Mineral Composition ◽  
Principal Component ◽  
Nutrient Status ◽  
Progressive Increase ◽  
Rust Disease ◽  
Hemileia Vastatrix ◽  
Mean Values ◽  
Leaf Analysis ◽  
Single Clone ◽  
The Difference

Leaf rust disease caused by Hemileia vastatrix fungus may become an important issue on highland coffee (Coffea arabica) especially related to the progressive increase in terms of global temperature. A research aimed at evaluating the mineral composition of some rusted coffee leaves from a single clone S 795 was carried out in Andungsari Experimental Station, Indonesian Coffee and Cocoa Research Institute. A single block experiment was situated at 1451 m asl. The intensity of rust spot in the leaves were identified, and estimated to correspond with the score of 5 to 7 out of 10. The difference in the nutrient status between normal and rusted leaves were statistically evaluated by comparing the mean values using unpaired t-test. The leaf analysis shows an optimal range for potassium (K), calcium (Ca), magnesium (Mg) and silicon (Si). Silicon distribution exhibits a high vari- ability with coefficient of variation (CV) around 30%, while K is slightly lower with CV less than 10%. Principal component analysis shows that Ca, Mg and K may have explained the most variation in the original variables as defined by PC1 (54.76%), PC2 (23.22%), and PC3 (14.01%). The rusted leaves are associated with Ca and Si while normal leaves are associated with K. A considerable high of K may explain for the depression of Ca in normal leaves which is, however, associated with an antagonism between these two minerals. The ratio of has a negative correlation with Ca, and may show a potential as an indicator for leaf mineral evaluation in the context of Hemileia vastatrix fungus infected coffee.

scholarly journals Interaction Between Oryctes Rhinoceros and Leaves’ Nutrient Content in Oil Palm

2018 ◽  
Vol 8 ◽  
pp. 1408-1414
Author(s):  
Mohd Rasdi Zaini ◽  
Nurul Farahana Hazira Hazlee ◽  
Fathul Nabila Abdul Karim
Keyword(s):  
Oil Palm ◽  
Negative Relationship ◽  
Nutrient Status ◽  
Nutrient Content ◽  
Oryctes Rhinoceros ◽  
Leaf Analysis ◽  
Palm Trees ◽  
Strong Positive Relationship ◽  
Nutrients Uptake ◽  
The Relationship

A study meant to evaluate the relationship between the presence of Oryctes rhinoceros to the oil palm in relation to the leaves’ nutrient content which is Phosphorus (P) and Potassium (K). Appropriate fertilization is one of the methods that can help to suppress the pests’ presence in the field. In general, insects’ pests are attracted to the plants that are supplied with excess supply of nutrient as it can help them to develop better in future as these nutrient play their roles in aiding through growths and insects’ fecundity. Data on nutrient status were collected were Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg), Copper (Cu) and Zinc (Zn). These data had been collected twice per month which were at the middle and at the end of each month. Four samples of leaves were taken from four sampling oil palm trees of each treatment. Leaves from ninth or seventeenth fronds were chosen as it is the best most ideal fronds to be used for leaf analysis to identify the nutrient content. The result of this study showed that Phosphorus (P) exerted a strong positive relationship with the presence of Oryctes rhinoceros in the oil palm while Potassium (K) showed a strong negative relationship between the two variables. Thus, developing awareness to the growers to this nutrients-balancing issue would be good for future agriculture in future as it is clear now that balanced nutrition is primordial to ensure availability of nutrients uptake by plants.

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