Studies on some solodic soils in north-eastern Queensland. 1. Morphological and chemical characteristics

1970 ◽  
Vol 10 (44) ◽  
pp. 334 ◽  
Author(s):  
BJ Crack ◽  
RF Isbell
Keyword(s):  
Chemical Properties ◽  
Summer Rainfall ◽  
Sampled Data ◽  
Nitrogen And Phosphorus ◽  
North Eastern ◽  
Variable Chemical ◽  
Calcium Magnesium ◽  
Major Chemical ◽  
Low Nitrogen ◽  
Phosphorus Levels

Morphological and chemical data are presented for solodic and solodized-solonetz soils occurring in north-eastern Queensland under a strongly seasonal summer rainfall. Mean annual totals range from 26 in, to 70 in. The soils have slightly acid sandy to loamy A horizons, often strongly bleached, and abruptly underlain by hard dense clay R horizons which are strongly alkaline at depth. Profiles show variable chemical properties but many surface elements show relatively little variability within or between areas sampled. Data for such elements may be interpolated for sites within the area studied. Major chemical features are low nitrogen and phosphorus levels which show little variation between areas sampled. The exchangeable calcium : magnesium ratio of surface soils is narrow but values do not suggest deficiencies or imbalance. In the subsoils magnesium and sodium are the dominant exchangeable cations. Exchangeable and acid-extractable potassium values are variable in surface horizons, and data indicate sufficiency in the lower rainfall areas with likelihood of deficiency under higher rainfall. The soils have several adverse physical properties.

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.

AM fungi and PGP pseudomonads increase flowering, fruit production, and vitamin content in strawberry grown at low nitrogen and phosphorus levels

Mycorrhiza ◽  
2014 ◽  
Vol 25 (3) ◽  
pp. 181-193 ◽  
Author(s):  
Elisa Bona ◽  
Guido Lingua ◽  
Paola Manassero ◽  
Simone Cantamessa ◽  
Francesco Marsano ◽  
...  
Keyword(s):  
Am Fungi ◽  
Fruit Production ◽  
Nitrogen And Phosphorus ◽  
Vitamin Content ◽  
Low Nitrogen ◽  
Phosphorus Levels

scholarly journals THE EFFECT OF SOIL CONDITIONS ON THE PHYSIOLOGICAL INDICES OF Costus afer Ker Gawl

2018 ◽  
Vol 6 (1) ◽  
pp. 362-367
Author(s):  
Etukudo Mbosowo ◽  
Simon Ebinimitei
Keyword(s):  
Standard Procedure ◽  
Chemical Properties ◽  
Mineral Elements ◽  
Soil Conditions ◽  
Test Plant ◽  
Nitrogen And Phosphorus ◽  
Physiological Indices ◽  
Calcium Magnesium ◽  
Phytochemical Contents ◽  
Costus Afer

The effect of different soil conditions on some physiological indices of Costus afer was studied in two locations (Otuoke and Opolo) in Bayelsa State, Nigeria. The soils physico-chemical properties as well as mineral elements and phytochemical contents in leaf samples were assessed using standard procedure. The descending order of mineral elements in location I were, P > Ca > Mg > K > C > H > AI >Na > N, while that of location 2 were, P > Ca > C > K >Al >H > Mg > Na > N. The contents of calcium, magnesium, sodium, potassium, nitrogen and phosphorus in leaves of C. afer in location I were significantly (P < 0.05) higher than those of location 2, while the iron, zinc and lead contents in leaves of the test plant in location 1 were relatively higher than that of location 2. There were also marked variations in phyto chemical contents in leaves of the test plant between the two locations. This study indicates that soil factors have a considerable influence on the mineral elements and phytochemical contents of Costus afer.

The development of cuttings of the Washington navel orange to the stage of fruit set. IV. The effect of different nitrogen and phosphorus levels on fruiting cuttings

1961 ◽  
Vol 12 (6) ◽  
pp. 1089 ◽  
Author(s):  
D Bouma
Keyword(s):  
Fruit Quality ◽  
Dominant Role ◽  
Sugar Content ◽  
Navel Orange ◽  
Nitrogen And Phosphorus ◽  
Nitrogen Levels ◽  
Washington Navel ◽  
Low Nitrogen ◽  
Phosphorus Levels

Washington Navel orange cuttings, which had flowered 6 months after striking and had set fruit, were subjected to three nitrogen and three phosphorus levels in factorial combination. Increasing nitrogen and phosphorus supply caused a relatively greater increase in the fresh weight of the peel and rag of the fruit than in that of the juice, and this was reflected in a greater diameter of the fruit, a thicker peel, and a decrease in the percentage juice content. The acidity and sugar content of the juice differed little between nitrogen levels, but a marked decrease in both was apparent with increasing phosphorus supply. The results are compared with those of a field experiment. The adverse effects of increasing nitrogen supply on fruit quality were similar in the two experiments. In the glass-house experiment, some improvement in fruit quality with increasing phosphorus levels was only apparent at the low nitrogen level. The dominant role of fruit development with respect to vegetative growth observed in the previous paper of this series was confirmed. Leaves on fruiting shoots showed considerably lower nitrogen and phosphorus contents than the remainder of the leaves, particularly at the higher levels of nutrition.

scholarly journals Nitrogen and Phosphorus Addition to Soil Improves Seed Yield, Foliar Stomatal Conductance, and the Photosynthetic Response of Rapeseed (Brassica napus L.)

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 483
Author(s):  
Esmaeil Zangani ◽  
Kamran Afsahi ◽  
Farid Shekari ◽  
Eileen Mac Sweeney ◽  
Andrea Mastinu
Keyword(s):  
Stomatal Conductance ◽  
Quantum Yield ◽  
Photosystem Ii ◽  
Chlorophyll Content ◽  
Seed Yield ◽  
Nitrogen Application ◽  
Flowering Stage ◽  
Nitrogen And Phosphorus ◽  
Brassica Napus L ◽  
Phosphorus Levels

The effects of nitrogen and phosphorus levels on the physiological traits, yield, and seed yield of rapeseed (Brassica napus L.), were studied in a farm research project of Zanjan University. Three levels of nitrogen (0, 100, and 200 kg/ha) and three levels of phosphorus (0, 75, and 150 kg/ha) were considered. The results showed that an increase in nitrogen level caused an increase in the leaf chlorophyll content so that the application of 200 kg/ha of nitrogen increased the chlorophyll content of the leaves until the mid-grain filling stage. Nitrogen application lowered leaf stomatal conductance in the early flowering stage whereas the stomatal conductance was increased during the late flowering stage. Nitrogen application (100 and 200 kg/ha) also increased the quantum yield of photosystem II. On the other hand, with the application of 150 kg/ha and 75 kg/ha of phosphorus, the leaf stomatal conductance and the quantum yield of photosystem II in the early flowering stage increased respectively. The results showed that the application of 200 kg/ha of nitrogen and 75 kg/ha of phosphorus significantly increased seed and oil yield compared to the control. In addition, the number of siliques per plant and the weight of 1000 seeds showed an increasing trend that was affected by nitrogen and phosphorus levels. This study demonstrated that nitrogen enhanced the chlorophyll content, leaf area, and consequently, the quantum yield of photosystem II. Nitrogen also augmented the seed filling duration, seed yield, and oil yield by increasing gas exchange. As a result, the application of 100 kg/ha of nitrogen together with 75 kg/ha phosphorus showed the greatest effect on the qualitative and quantitative yield of rapeseed. However, the application of 200 kg/ha of nitrogen alone or in combination with different levels of phosphorus did not significantly increase many of the studied traits.

Catchment soil characteristics predict organic carbon, nitrogen, and phosphorus levels in temperate lakes

2021 ◽  
Author(s):  
Margot Sepp ◽  
Toomas Kõiv ◽  
Peeter Nõges ◽  
Tiina Nõges ◽  
Silvia Newell ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Characteristics ◽  
Temperate Lakes ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Levels

Study of the nutritional dynamic in olive leaves: periods of analytical stability

2017 ◽  
Vol 7 ◽  
Author(s):  
Juana Nieto ◽  
Antonio García-Fuentes ◽  
Llenalia M. García ◽  
Emilia Fernández-Ondoño
Keyword(s):  
Nutritional Deficiencies ◽  
Winter Period ◽  
Olive Leaves ◽  
Nitrogen And Phosphorus ◽  
Analytical Stability ◽  
Opposite Behavior ◽  
Zinc Concentrations ◽  
Calcium Magnesium ◽  
Olive Trees ◽  
One Year

The aim of this study was to establish the evolution curves of macro- and micro-nutrients in olive leaves and the periods of time in which they are statistically stable and can be considered suitable for a nutritional diagnosis. The study was carried out in two farms of the province of Jaén (Andalucia, Southern Spain), with olive trees of the Picual variety, under an irrigation regime and no nutritional deficiencies over the entire year. The evolution curves of each nutrient had great similarities when comparing between farms and between periods. Only in some periods the farm “Poco Humo” had higher concentrations, probably due to the most favorable edaphic characteristics of this farm. Nitrogen and phosphorus showed minimum concentrations when the leaves were young and when they were one year old, and maximum concentrations during the winter. Potassium and boron showed higher concentrations when the leaves were young, and the concentrations decreased throughout the first year of life. Concentrations of calcium, magnesium and manganese had the opposite behavior: these accumulated in leaf until reaching maximum values in winter and then remained stable, with some oscillations but without statistically significant differences. No changes were observed in the zinc concentrations in the sampled periods. Periods of at least two consecutive months without statistically significant differences were found during the winter period for all elements except nitrogen. Analytical stability was observed from the second fortnight of May till the first fortnight of August for all elements except phosphorus and boron.

scholarly journals Meat and bone meal as nitrogen and phosphorus supplier to cereals and oilseed rape

2014 ◽  
Vol 23 (1) ◽  
pp. 19-27 ◽  
Author(s):  
Anna Nogalska ◽  
Lin Chen ◽  
Stanisław Sienkiewicz ◽  
Zenon Nogalski
Keyword(s):  
Oilseed Rape ◽  
Crop Yields ◽  
Field Trials ◽  
Protein Yield ◽  
Meat And Bone Meal ◽  
Bone Meal ◽  
Nitrogen And Phosphorus ◽  
Mineral Fertilization ◽  
Winter Triticale ◽  
North Eastern

The purpose of this study was to evaluate the effect of meat and bone meal (MBM) on cultivation of winter triticale, winter oilseed rape, winter wheat and maize. The average annual yields and protein yield achieved in crop rotation were studied. The field trials were carried out in north-eastern Poland in 2006–2010. The factor was dose of MBM: 1.0, 1.5, 2.0 and 2.5 t ha-1 year-1 or 2.0, 3.0, 4.0 and 5.0 t ha-1 every other year. The four-year experiment has proven that MBM is a valuable nitrogen and phosphorus fertilizer in cultivation of cereals and oilseed rape. By amendment of the tested meal into the soil it produced crop yield and protein yield similar to that achieved by mineral fertilization. However, the crude fat yield of rape was significantly higher under the influence of all the MBM doses. The yield-stimulating effect of MBM did not depend on the frequency of its application; therefore it is more convenient to apply it once every two years. Increasing MBM from 1.5 to 2.5 t ha-1 did not significantly increase any of the four crop yields, therefore for soils that had satisfactory nutrients content, 1 or 1.5 t ha-1 MBM is enough and increasing MBM will only increase economic burden for farmers and environmental risks.

scholarly journals Tear electrolyte assessment of diabetic patients in Southern Nigeria

1970 ◽  
Vol 19 (4) ◽  
pp. 2839-2845
Author(s):  
Juno Okukpon ◽  
Oziegbe Okukpon
Keyword(s):  
Extracellular Fluid ◽  
Chemical Properties ◽  
Cross Sectional Study ◽  
Diabetic Patients ◽  
Glass Capillary ◽  
Cross Sectional ◽  
Increased Risk ◽  
Calcium Phosphorus ◽  
Calcium Magnesium ◽  
The University

Background: Tears are a critical body extracellular fluid coating the surface epithelial cells of the cornea and conjunctiva, and providing the optically smooth surface necessary for refraction of light onto the retina. The biological and chemical properties of tears change in response to systemic disease.Objectives: This study assessed the concentration of calcium, magnesium and phosphate levels in tears of diabetics.Methods: A comparative cross-sectional study involving twenty diabetics visiting Department for Health Services, University of Benin and forty non-diabetics within the University between 35 to 65 years participated in the study. Calcium, magnesium and phosphorous were analysed in tears sample collected with 75mm glass capillary tubes.Results: The fasting blood sugar (FBS) and age of diabetic patients was 7.48±1.88mmol/l and 56.75±5.82years and non-diabetics was 4.83±0.52mmol/l and 53.58±6.16years respectively. Magnesium showed no differences (P<0.05) between diabetics (0.76±0.45mmol/l) and non-diabetics (0.93±0.59mmol/l). Calcium was elevated (P=0.041) and phosphate (P=0.044) was decreased in diabetics (3.14±1.65mmol/l and 0.074±0.058mmol/l) than non-diabetics (2.41±1.05mmol/l and 0.11±0.081mmol/l).Conclusion: This study concluded that being diabetic can affect the levels of some tear electrolytes in the tear fluid which may lead to an increased risk of diabetic ocular complications.Keywords: Tears, diabetics, mag nesium, calcium, phosphorus.

scholarly journals Does the Mixture of Species change the C:N:P Ecological Stoichiometric Characteristics of fine Roots? A Case Study of Cupressus Funebris Mixed Forest

2021 ◽  
Author(s):  
Wenchun He ◽  
Yang Wang ◽  
Xiaochen Wen ◽  
Yu Wang ◽  
Baoru Xiao ◽  
...  
Keyword(s):  
Fine Roots ◽  
Environmental Changes ◽  
Mixed Forest ◽  
Chemical Properties ◽  
Available Phosphorus ◽  
Biological Factors ◽  
Nitrogen And Phosphorus ◽  
Mixed Stands ◽  
Available Nitrogen ◽  
Low Efficiency

Abstract The growth of fine roots of trees is affected by environmental changes and biological factors. At present, there have been many researches on the physiological plasticity of fine roots caused by environmental changes, but there are still few studies on the influence of biological factors on fine roots. This paper focused on the contents of carbon (C), nitrogen (N), and phosphorus (P), and their ecological stoichiometric ratios in different root orders of Cupressus funebris fine roots in 11 mixed stands with Koelreuteria paniculate or Toona sinensis at different ratios, and the effects of soil physical and chemical properties on the root chemical properties. It aimed to provide new insights into the fine-root nutrient distribution pattern and the transformation or reconstruction of low-efficiency pure forests from the standpoint of forest types. The results showed that: soil pH, and the content of available nitrogen (SAN), available phosphorus (SAP) and available potassium (SAK) differed significantly in the tested mixed forest stands. No significant differences in carbon content of fine roots were observed in different mixed stands. The content of nitrogen and phosphorus in fine roots in mixed forests showed heterogeneity. Species mixing changed the C/N, C/P and N/P of the C. funebris compared the pure stands. The "T. sinensis + C. funebris" forest alleviated the limitation of the lack of phosphorus on fine roots of C. funebris on. The principal component analysis showed that mixed stands of "T. sinensis + C. funebris" had the highest comprehensive score at ratio of "3:1". Thus, our results recommended the adoption of T. sinensis, especially at 75%, to reconstruct the low-efficiency pure C. funebris forest.

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