Nitrogen, Phosphorus, and Potassium Inter-Relationships in Young Peach and Apple Trees

Cullinan, F. P.; Batjer, L. P.

doi:10.1097/00010694-194301000-00005

Cited by 14 publications

(7 citation statements)

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“…In general, .at a given nitrate level, a decrease in the phosphate concentration induced a more normal pbnt metabolism. T he reciprocal relationship between nitrogen and phosphorus in plant nutrition has been pointed out by other investigators (3,6,8).…”

Section: Resultsmentioning

confidence: 70%

Título en español.

Medina¹,

López²

1967

JAUPR

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Greenhouse studies with Gros Michel bananas in sand cultures were conducted in two experiments. In one, nitrates, phosphates, and sulfates were varied while cations were kept constant. In another, potassium, calcium, and magnesium concentrations were variable while anions were constant. Measurements of height, stem diameter, number of leaves, and length and width of the second topmost leaf were taken when the plants were 6 months old. The general appearance of the plants was also evaluated. At a given nitrate level a more normal metabolism was possible when phosphate concentration decreased. High potassium favored better plant development. The data suggest a greater antagonistic effect between calcium and potassium than between magnesium and potassium.

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Section: Resultsmentioning

confidence: 70%

Título en español.

Medina¹,

López²

1967

JAUPR

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“…Values higher than this are usually not achieved simply by increasing phosphorus supply (Chapman and Rayner, 1951), but presumably result from metabolic influences on phosphorus retention by the plant. Similar effects on leaf phosphorus concentrations have been shown to result from deficiencies of nitrogen (Chapman and Liebig, Jr., 1940;Cullinan and Batjer, 1943;Mc-Calla and Woodford, 1938), sulfur (Chapman and Brown, 1941), and zinc (Haas, 1936;Kelley and Cummins, 1920;Reed, 1946).…”

Section: Iron Nutritionmentioning

confidence: 65%

Iron requirement studies of navel orange trees in solution cultures

Wallihan¹,

Garber²,

Hammond³

et al. 1967

Hilg

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Difficulties in controlling the supply of iron to citrus trees when grown in soil led the authors to use of nutrient solutions for this study. Twenty-four nucellar navel orange trees were grown for eleven years in individual tanks of nutrient solutions, out of doors. Eight of them were maintained at high-iron levels by regular additions of iron sulfate to the nutrient solutions. The remaining trees became iron deficient at various rates. Analyses of standard leaves, picked in the early fall season, provided a measure of the changing level of iron nutrition for each tree from year to year. The results show that, when the concentration of iron in standard leaves was 30 ppm or less for two consecutive years, the rate of tree growth and the numbers of fruit produced diminished. Fruit sizes were unaffected, except that in some years, fruit on irondeficient trees were somewhat larger than those on trees supplied with iron. Chemical differences in the fruit were slight except for iron concentrations. Fruits were lighter colored in iron-deficient trees. Iron deficit was also accompanied by loss of leaves and dieback of twigs. This obvious symptom may provide a useful measure of the severity of iron deficit.

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“…For the analysis of other constituents of the leaves and for all constituents of the composite samples, dried material was employed. Five-hundred-milligram portions of dried, finely ground material from the composite or leaf samples were weighed into porcelain capsules, moistened with sulphuric acid (1)(2)(3)(4)(5)(6)(7)(8)(9)(10), dried at 1050 C. and ashed at 600°C. for 16 hours.…”

Section: Methods Of Analysismentioning

confidence: 99%

“…All plants were harvested between 8: 00 a.m. and 11: 00 a.m. except in the case of the second block at the first harvest. This block was harvested between 1: 00 p.m. and 3: 00 p.m. on February 6. At each harvest the plants from one half the crocks in each plot were removed, (i.e., 45 plants per treatment) so the randomized arrangement was maintained.…”

Section: Culture Techniquementioning

confidence: 99%

Potassium Deficiency and Excess in Guayule I. Growth Responses and Mineral Content

Cooil¹

1948

Plant Physiol.

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The extensive literature dealing with the role of potassium in plant metabolism has been reviewed by HOFFER (20), by various authors (47) in a recent symposium and in several reviews on mineral nutrition of plants (11,17,18,28,39,46). Very recently SIDERIS and YOUNG (42,43,44) have dealt with several aspects of the problem. HOAGLAND (19) has pointed out that at one time or another a role in almost every important physiological process in the plant has been ascribed to potassium. Yet, the mechanism of its role in any specific process has not been elucidated.In several respects the guayule plant, Parthenium argentatum A. Gray, differs from most of the plants which have been subjected to detailed nutritional study. For example, incidence of the reproductive phase in guayule is not attended by cessation of vegetative growth nor by curtailed nutrient absorption. This behavior is contrasted with that of many annual plants, for which a period of rapid growth and mineral absorption is terminated by the reproductive phase. NIGHTINGALE et al. (31) found that a deficiency of potassium in tomato plants induced premature fruiting. The result was withdrawal of a large portion of the potassium from the vegetative parts to the fruits. RICHARDS and TEMPLEMAN (40) found that for the barley plant potassium deficiency resulted in continued tillering and failure of plants to head. The sodium content of the nutrient solutions appears to be a factor associated with the latter result (39). No effects analogous to the premature fruiting of tomato plants or to the retarded heading of barley plants are evident for guayule moderately deficient in potassiuim. The use of guayule plants in a study of potassium nutrition, therefore, has the advantage of permitting comparison between plants which are in different nutritional states, without complications of premature or delayed incidence of the reproductive phase.

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Nitrogen, Phosphorus, and Potassium Inter-Relationships in Young Peach and Apple Trees

Cited by 14 publications

References 0 publications

Título en español.

Título en español.

Iron requirement studies of navel orange trees in solution cultures

Potassium Deficiency and Excess in Guayule I. Growth Responses and Mineral Content

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