Effect of nutrient potassium: calcium: magnesium ration in the production of flue-cured tobacco

1970 ◽  
Vol 10 (46) ◽  
pp. 635
Author(s):  
A Pinkerton
Keyword(s):  
Nutrient Solution ◽  
Marked Effect ◽  
Calcium Content ◽  
Ionic Concentration ◽  
Sand Culture ◽  
Leaf Quality ◽  
Equivalent Basis ◽  
Calcium Magnesium ◽  
Potassium Magnesium ◽  
Total Ionic Concentration

In an outdoor trial with tobacco in sand culture, four potassium: magnesium ratios were combined with three calcium levels in the nutrient solution while the pH and total ionic concentration were maintained constant. By reduction of the concentration during ripening, the nitrogen regime was manipulated so as to produce plants closely resembling those in a held grown crop. Optimum leaf quality was found to result from the use of a nutrient solution containing 20-40 per cent of the cations as calcium on an equivalent basis. When calcium exceeded 40 per cent of the total cations, no good quality leaf was obtained ; when it formed only 20 per cent, the potassium : magnesium ratio had a less marked effect on quality. The concentrations of the three elements in the leaf of optimum quality are given for several leaf positions. At each leaf position the calcium content of the leaf was negatively correlated with quality. A potassium : magnesium ratio of 3:l in the nutrient led to quicker ripening of the leaf, and leaf thickness was dependent on the potassium : magnesium ratio of the nutrient.

The effects of magnesium deficiency on the quality and magnesium content of flue-cured tobacco leaf

1970 ◽  
Vol 21 (4) ◽  
pp. 613
Author(s):  
A Pinkerton
Keyword(s):  
Leaf Area ◽  
Nutrient Solution ◽  
Magnesium Deficiency ◽  
Dry Weight ◽  
Magnesium Content ◽  
Magnesium Concentration ◽  
Sand Culture ◽  
Final Size ◽  
Total Leaf Area ◽  
Equivalent Basis

In an outdoor trial with tobacco in sand culture, two levels of magnesium were supplied initially in the nutrient solution. The effects on quality and magnesium concentration in the cured leaf when magnesium was withheld from the nutrient were studied. When the magnesium supply was inadequate the reduction in magnesium concentration in leaves was largely accounted for by the diluting effect of increase in dry weight, and was accentuated under conditions of extreme deficiency by transference of magnesium from older leaves to actively expanding tissues nearer the apex. The effects of deficiency on quality depended partly on the amount of magnesium the plant had absorbed before the cessation of magnesium supply. To avoid loss of quality, magnesium in the nutrient solution had to be maintained at 20 % at least of the total cations (equivalent basis) until plants had been 'topped' (i.e. inflorescence removed) and the total leaf area of the plant had reached c. two-thirds of its final size.

NODULATION RESPONSES OF TWO NEAR ISOGENIC LINES OF THE SOYBEAN

1957 ◽  
Vol 3 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Francis E. Clark
Keyword(s):  
Amino Acids ◽  
Ascorbic Acid ◽  
Nutrient Solution ◽  
The Other ◽  
Negative Response ◽  
Sand Culture ◽  
Near Isogenic Lines ◽  
Soybean Line ◽  
Sand Cultures ◽  
Different Soils

Nodulation responses and certain other characteristics of a mutant soybean line highly recalcitrant to nodulation were compared with those of a nodulating sister line. Roots of the two lines were found to harbor equal numbers of rhizobia. Stem graftings to provide top growths of one line on roots of the other failed to alter the distinctive nodulation responses of rootstocks. Ascorbic acid contents in the two lines were identical, both in the tops and in the roots, although contents in tops greatly exceeded those found in roots. Chromatographic studies on the amino acids in seed hydrolyzates and in alcoholic extracts of seedlings showed no differences between the two lines either in kind or quantities of amino acids. In a survey of stock rhizobia for cultures effective on the nonnodulating line, bacteria were discovered which formed nodules on such soybeans growing in sand and nutrient solution. Isolates from these nodules again yielded effective nodulation on plants in sand culture, but gave no nodulation whatsoever on plants growing in soil. This negative response was confirmed in three different soils. Admixtures of soil and of miscellaneous materials with sand were employed to alter nodulation responses from those shown in sand cultures.

Ostracodes as Hydrologic Indicators in Springs, Streams and Wetlands: A Tool for Environmental and Paleoenvironmental Assessment

2003 ◽  
Vol 9 ◽  
pp. 203-222 ◽  
Author(s):  
Alison J. Smith ◽  
Jesse W. Davis ◽  
Donald F. Palmer ◽  
Richard M. Forester ◽  
B. Brandon Curry
Keyword(s):  
Ionic Composition ◽  
The United States ◽  
Ionic Concentration ◽  
Climate Data ◽  
Large Database ◽  
Chemical Parameters ◽  
Hydrologic Indicators ◽  
Components Analysis ◽  
Physical And Chemical ◽  
Total Ionic Concentration

Although the majority of publications on extant nonmarine ostracode species in North America are concerned with lacustrine settings, many species that are potentially valuable as indicators of water quality changes live in non-lacustrine settings. Ostracode distributions in 157 springs, wetlands and streams in the United States are examined here in order to assess 1) species richness, 2) association with physical and chemical parameters of their habitats and 3) the presence of potentially useful biomonitors and environmental sentinels. The 157 non-lacustrine sites are a subset of a large database (North American Non-marine Ostracode Database: NANODe version 1) consisting of 611 mostly lacustrine sites with ostracode species, presence-absence data, hydrochemistry and climate data (Forester et al., in review). Of the 89 species represented in NANODe version 1, 51 species are found in springs, 59 species are found in wetlands and only 15 species are found in streams. Many species are found in at least two of these habitats and some in all three. Principal Components Analysis of these 157 sites indicates that 71% of the variance is explained by salinity (total ionic concentration), alkalinity and temperature, a result consistent with previously published analyses of natural water. Cluster analysis shows that spring species are most strongly tied to temperature, whereas wetlands and streams are most strongly tied to ionic composition. Three species are found to be potentially valuable biomonitors: Cavernocypris wardi in springs, Fabaeformiscandona rawsoni in wetlands and Physocypria globula in streams.

Effect of nutrient solution salinity and ionic concentration on parsley (Petroselinum crispumMill.) essential oil yield and content

2015 ◽  
Vol 39 (8) ◽  
pp. 1057-1062 ◽  
Author(s):  
Juan Eugenio Álvaro ◽  
María Teresa Lao ◽  
Miguel Urrestarazu ◽  
Mourad Baghour ◽  
Moumen Abdelmajid
Keyword(s):  
Essential Oil ◽  
Nutrient Solution ◽  
Ionic Concentration ◽  
Oil Yield ◽  
Essential Oil Yield

Bitter pit in the apple variety Cleopatra in Tasmania in relation to calcium and magnesium

1960 ◽  
Vol 11 (5) ◽  
pp. 742 ◽  
Author(s):  
D Martin ◽  
TL Lewis ◽  
J Cerny
Keyword(s):  
Calcium Nitrate ◽  
Calcium Content ◽  
Magnesium Nitrate ◽  
Critical Element ◽  
Apple Variety ◽  
Nitrate Treatment ◽  
Significant Difference ◽  
Bitter Pit ◽  
Calcium And Magnesium ◽  
Potassium Magnesium

When spray treatments were applied to half-trees of Cleopatra apples, it was shown that magnesium nitrate increased the incidence of pit and calcium nitrate decreased it. There was a suggestion that borax decreased the effectiveness of the calcium nitrate treatment. Magnesium or calcium nitrate, with or without borax, did not affect the potassium, magnesium, phosphorus, or nitrogen content of the fruit cortex. Calcium nitrate in 1959 increased the calcium content but magnesium nitrate had no effect. There was no significant difference in the content of potassium, magnesium, or phosphorus between 1958 and 1959, but the calcium content was 3.3 times as high in 1958. Pit incidence was low in 1958 and high in 1959. No significant difference in content of these four elements could be demonstrated between sound and pitted fruits. The results support the view that calcium is the critical element in pit incidence and that magnesium may play an important part.

scholarly journals Potassium, magnesium and calcium content in individual parts of Phaseolus vulgaris L. plant as related to potassium and magnesium nutrition

2011 ◽  
Vol 50 (No. 1) ◽  
pp. 18-26 ◽  
Author(s):  
J. Tůma ◽  
M. Skalický ◽  
L. Tůmová ◽  
P. Bláhová ◽  
M. Rosůlková
Keyword(s):  
Phaseolus Vulgaris ◽  
Dry Matter ◽  
Calcium Content ◽  
Magnesium Content ◽  
Potassium Content ◽  
Pot Experiment ◽  
Content Increase ◽  
Phaseolus Vulgaris L ◽  
Potassium Magnesium

In a two-pot experiment of Phaseolus vulgaris L., the influence of K and Mg gradated doses upon K, Mg and Ca content in the pods, stem and leaves was studied. The content of cations changed significantly in individual parts of the plant. The highest content of potassium was found within the dry matter of the pods (it exceeded 4%) and stalk (3–4%). The highest content of calcium (3–4%) and magnesium (0.4–0.8%) was found within the dry matter of the leaves. The effects of K gradated doses were revealed significantly in its higher content increase mainly in the leaves (by as much as 83%) and the decrease of calcium content (31%) and magnesium content (37%) was observed in the leaves and less in the stalks. The effects of Mg gradated doses were revealed in the non-significant increase in its content in the leaves and stalks and the decrease of the potassium content in the leaves (by 19%) and in stalks (11%) and even in the decrease of the calcium content (52%) mainly in the pods.

A routine method for the measurement of the sodium, potassium, magnesium and calcium content of human lymphocytes

1990 ◽  
Vol 187 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Nery Weissberg ◽  
Baruch A. Brooks ◽  
Gila Schwartz ◽  
Uri Eylath ◽  
Abraham S. Abraham
Keyword(s):  
Human Lymphocytes ◽  
Calcium Content ◽  
Routine Method ◽  
Sodium Potassium ◽  
Potassium Magnesium

scholarly journals Calcium Nutrition and Cultivar Influence Incidence of Tipburn of Collard

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 544-546 ◽  
Author(s):  
Jon R. Johnson
Keyword(s):  
Brassica Oleracea ◽  
Nutrient Solution ◽  
Foliar Application ◽  
Normal Growth ◽  
Field Studies ◽  
Sand Culture ◽  
Culture Studies ◽  
Calcium Nutrition ◽  
Soil Application ◽  
Young Leaves

The collard (Brassica oleracea, Acephala group) cultivar Vates was more susceptible than `Blue Max' to tipburn in sand-culture and field studies. Calcium concentrations in young leaves were similar for both cultivars. `Blue Max' appears to require a lower Ca concentration in young leaves than `Vates' for normal growth. In sand-culture studies, increasing the Ca level in nutrient solution to 3 mm or higher decreased tipburn in `Vates'. `Blue Max' did not develop tipburn regardless of Ca level. Increasing the Ca level in nutrient solution increased Ca concentration in young and old leaves for both cultivars. Soil application of CaSO4 or foliar application of Ca(NO3)2 or CaCl2 did not decrease occurrence of tipburn in Yates', presumably because these treatments did not increase Ca concentrations in young leaves.

SOME EFFECTS OF FERTILIZATION ON THE YIELD, BOTANICAL AND CHEMICAL COMPOSITION OF IRRIGATED GRASS AND GRASS-CLOVER PASTURE SWARDS

1960 ◽  
Vol 40 (3) ◽  
pp. 546-562 ◽  
Author(s):  
E. H. Gardner ◽  
T. L. Jackson ◽  
G. R. Webster ◽  
R. H. Turley
Keyword(s):  
Nitrogen Fertilization ◽  
Calcium Content ◽  
Mineral Nutrient ◽  
Available Phosphorus ◽  
Time Interval ◽  
Available Nitrogen ◽  
Nutrient Yield ◽  
Calcium Magnesium ◽  
High Yields ◽  
Moderate Yield

In an irrigated pasture experiment on Vancouver Island, on a soil deficient in available nitrogen and potassium but apparently containing sufficient available phosphorus, calcium and magnesium for adequate plant growth, an irrigated Ladino clover-grass mixture greatly outproduced a grass mixture on a forage, protein and mineral nutrient yield basis. In order to attain even a moderate yield with a grass mixture, heavy fertilization with nitrogen and potassium was necessary. Nitrogen fertilization was not essential to high yields with the Ladino clover-grass mixture. Nitrogen fertilization tended to decrease the per cent Ladino clover and the protein and calcium content in the clover-grass forage and increased the protein content of the grass herbage. The calcium content of the grass herbage was decreased by nitrogen fertilization. The phosphorus and magnesium contents of the clover-grass and grass herbage were not appreciably altered by nitrogen fertilization. Decreasing the time interval between nitrogen applications resulted in a more even production of dry matter over the growing season but did not increase the total seasonal yield. Potassium fertilization increased the yield of both mixtures and increased the per cent clover in the grass-clover sward. Multi-annual potassium applications were required for the elimination of plant potassium deficiency symptoms and the applied potassium was quickly absorbed by the plants. Grass herbage contained more potassium, slightly more phosphorus and less calcium, magnesium and nitrogen than grass-clover herbage.

Recovery of flue-cured tobacco from magnesium deficiency: changes in leaf magnesium content and effects on leaf quality

1972 ◽  
Vol 23 (4) ◽  
pp. 641 ◽  
Author(s):  
A Pinkerton
Keyword(s):  
Magnesium Deficiency ◽  
Magnesium Content ◽  
High Rate ◽  
Sand Culture ◽  
Tobacco Plants ◽  
Leaf Quality ◽  
Deficiency Symptoms ◽  
Nutrient Solutions

Twenty-four days after being transplanted into sand culture outdoors, tobacco plants were supplied with nutrient solutions with and without magnesium. Magnesium at two levels was resupplied to some deficiency-stressed plants 6, 11, 16, or 26 days later, and all plants were grown to maturity. The value of cured leaf was affected adversely when the period without magnesium exceeded 6 days. Quality of top leaf, but not of cutters, was improved when resupply was made at the rate necessary for maximum leaf value when supplied throughout. Addition of magnesium at a higher level improved the quality of leaf lower on the stalk, but led to an accumulation of magnesium in top leaf with subsequent impairment of quality. It appeared that the leaf concentration of magnesium had to fall below 0.2% for a period of between 5 and 10 days for leaf deficiency symptoms to appear. The application of magnesium, even at a high rate, upon the appearance of the first symptoms of deficiency resulted in a loss of over 25% in the value per plant.

Sign in / Sign up

Export Citation Format

Share Document