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Saturday, August 28, 2021 | History

2 edition of Effects of soil moisture-tension on rubidium uptake by sunflowers found in the catalog.

Effects of soil moisture-tension on rubidium uptake by sunflowers

David Stuart Stevenson

Effects of soil moisture-tension on rubidium uptake by sunflowers

  • 252 Want to read
  • 17 Currently reading

Published .
Written in English

    Subjects:
  • Soil moisture.,
  • Growth (Plants),
  • Rubidium.,
  • Sunflowers.

  • Edition Notes

    Statementby David Stuart Stevenson.
    The Physical Object
    Pagination101 leaves, bound :
    Number of Pages101
    ID Numbers
    Open LibraryOL17947515M

    tric soil moisture devices. Advan-tages of measuring/monitoring soil moisture include determining soil moisture depletions, adequacy of wetting from irrigation, patterns of soil moisture extraction due to root uptake of water and trends in soil moisture content with time during the irrigation season. This informa-tion can also be used to validate. Key words: bulk density, carbon mineralization, crop yield, nitrogen mineralization, nutrient uptake, soil compaction Abstract A field experiment with different levels of compaction was carried out on a mouldboard ploughed silty clay, with the objective of studying the effects on plant nutrient uptake and growth. Soil from the field was also.   crop productivity and improved of soil fertility (Mohapatra and Dixit, and Chavan et al., ). Keeping the above points in view, an experiment was conducted to study the combined effect of irrigation, mulching and INM on nutrient content, nutrient uptake and available nutrients in .


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Effects of soil moisture-tension on rubidium uptake by sunflowers by David Stuart Stevenson Download PDF EPUB FB2

Rubidium uptake was not consistently affected by the different water contents, nor was the uptake correlated with the amount of root growth.

There was, however, at least as much rubidium accumulated in the plants in 28 hours, when the adventitious roots were wetter than the main root systems, as was accumulated in the plants in six days when the adventitious roots were drier than the main root : David Stuart Stevenson.

Changes in soil moisture influenced the rate of diffusion, rate of root elongation, and the incidence of root hairs. The self-diffusion of Rb 86 was linearly correlated (R 2 ) positively with soil mositure, Rb concentration, and interaction of these two factors.

The correlation of Rb 86 uptake from the soil was positively correlated with Rb 86 diffusion values approximated from measurements made ofCited by: Effects of soil moisture-tension on rubidium uptake by sunflowers If this is true it isud difficult to distinguish the effects of different water contents on absorptionud phenomena such as water or ion uptake from the effects of the waterud contents on the root growth itself.

were placed around the stems of six-week old sunflower. The P, NO 3 and Ca contents of the soil solution (per unit dry soil) increased with the water content. the increases differed for each nutrient (the general order being NO 3 P, K Ca) and with the manurial treatments. Changes in the actual concentration of nutrients (per unit volume of soil solution) were generally comparatively by: criterion for the selection of sunflower plants.

Effect of soil moisture maintenance methods on the sunflower dry mass accumulation With respect to the dry mass of shoot in the sunflower plants, the highest yields were recorded by the gravimetric method, a rise of Effects of soil moisture-tension on rubidium uptake by sunflowers book compared with the irrigator system (Figure 1).

Cited by: 1. The Effect of Soil Moisture and Rubidium Concentration on Diffusion and Uptake of Rubidium Place, Gerald A. ; Barber, Stanley A.

Abstract. Publication: Soil Science Society of America Journal. Pub Date: DOI: sssajx Bibcode: SSASJP Cited by: The effects of soil texture and soil moisture on photosynthesis, growth and nitrogen uptake of photosynthesis, respiration, vegetative growth and nutrient uptake.

Soil texture, in the strictest sense, is the relative proportions atmosphere tension and percent available moisture for all five soil. With increasing soil moisture content, the soil EC and ESP decreased but the pH and SAR increased mainly due to the increasing concentrations of HCO 3 and decreasing concentrations of Ca 2 and Mg 2.

The significant effects of soil moisture content on the measured variables (except for soluble anions and the SAR) decreased with treatment day. The soil moisture profile in the ridge in each plot wa measured weekly by gravimetric sampling (04).

2 m) and neutron probe ( m), the latter having been calibrated against volumetric soil cores at the site. Field capacity values for all the plots. Sunflowers are hyper-accumulators, which means they uptake metals from soil in large quantities, he said.

In general, phytoremediation provides a much less invasive way to clean soil than digging it all out of the ground or using other treatments and its certainly much cheaper. Raising soil moisture from M0 to M1 increased shoot K uptake by 81, 70, and 68, with the S 0, S 1, and S 2 soils, respectively.

Raising soil moisture further, from M1 to M2 resulted in a further increase of 13 in K uptake by corn with the S 0 soil but small decreases of 13 and 8, with the S 1.

The effect of mean moisture tension during blooming till first picking date of dwarf French beans yield kgs80 plants 9 o Mean pF before blooming 2 3». 2 2 2 2 3 f 2 mean pF example, a large influence of soil moisture tension on vegetative growth was observed.

cantly with increased soil moisture content at both CO 2 levels, possibly due to increased uptake of 15N-rich organic N. Although not adequately replicated, plant biomass δ15N was lower under elevated than under ambient CO 2 after adjusting for plant N uptake effects.

Thus, increases in soil moisture can increase plant biomass δ15N, while elevated CO. BassiriRad H, Tissue DT, Reynolds JF, Chapin FS III () Response of Eriophorum vaginatum to CO 2 enrichment at different soil temperatures: effects on growth, root respiration and PO 4 3 uptake kinetics.

New Phytol CrossRef Google Scholar. Results We found enriched ²H and ¹N in water and plant samples, and both water and N uptake were observed down to m.

The ²H enrichment. However, the total marketable yield ranged from to kg plant1 in sandy loam soil and to kg plant1 in silty loam soil from a low to high CWSIW.

The soil moisture distribution affects the vertical distribution of the root system. When the soil water content is high, the resistance of the soil to the root diffusion becomes smaller, which is conducive to the occurrence of new roots. The soil usually contains a certain amount of available water, so the root system itself is not prone to water deficit.

decrease significantly with reduction in soil moisture content and increase in bulk density. The effect of increasing bulk density was considerable at low soil moisture contents. A bulk density of g ~m'~ and moisture contents ranging from 8 to 11 were observed to be favorable for germination and emergence of all the three crops.

Increasing rates of applied sulphur up to 80kg ha 1 enhanced the nitrogen uptake by different plant parts followed by 60kg S ha 1 irrespective of growth stages.

The increased uptake of N by sunflower was due to synergistic interaction effect of N and S. The results are in agreement with those of Khandkar and Shinde () in blackgram. Higher rates of sulphur did not improve the uptake.

Excessive soil moisture in poorly drained soils reduces oxygen supplies for microbial activity and results in higher levels of organic matter. In some northern states, poorly drained swamp or bog areas have resulted in peat soils that contain over 80 organic matter. Soil organic matter levels tend to decline as soils are farmed.

available soil moisture. If plants are present, it is assumed they will withdraw soil moisture within their root zone that is held at tensions less than approximately 15 atmospheres, regardless of plant type or species.

The plants will then be wilted and the soil will be at the permanent wilting percentage. Soil moisture held at tensions greater. The higher amount of available nutrients resulted in higher root elongation afterwards. At medium soil moisture levels an increasing soil nutrient supply increased the root surface to a greater extent than the L values, due to the compensatory growth of finer, longer roots.

The rate of elongation was established at different ages in each treatment. Effects due to restricted water availability were found only at potentials greater than bars, the roots being shorter and thinner as moisture stress increased. The role of mechanical impedance, poor aeration and water availability in restricting pea (Pisum sativum L.

) seedling root growth in sandy loam soil. nutrient uptake, the demands of growth and development will normally be met. For example, the ratio of calcium and magnesium on the soil cation exchange sites and in soil solution has little effect on the ratio of these nutrients in the plant.

The plant selects the ions it needs, allowing the. in higher production of carbon dioxide in the soil Allison Effects of soil temperature on plant growth Soil temperature has a great effect on plant growth by influencing water and nutrient uptake Toselli et al.44 root and shoots growth Weih et al Water uptake Water uptake decreases with low temperature.

This is due to the. Introduction. The role of deep root uptake of water in the lowland tropical forests of the Amazon has been a major discovery during the last 15 yr (Nepstad et al.; Hodnett et al.). Evidence of soil moisture depletion to depths of 18 m, inferred to be a function of root uptake, has recently been reported in an Amazonian forest (Davidson et al.

). Effect of Temp and Moisture on Soil Organic Matter. Soil Organic Matter Content Effect of Soil-herbicide Bonding on Herbicide Performance Clay Soil Solution or Vapor Phase Relative N Uptake for Wheat 0 20 40 60 80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Effect of Increased Soil Moisture and Reduced Soil Temperature on a Desert Soil Arthropod Community WILLIAM P.

MACKAY, SOLANGE SILVA, DAVID C. LIGHTFOOT, MARIA INEZ PAGANI and WALTER G. WHITFORD' Department of Biology, Box 3AFJ New Mexico State University, Las Cruces ABSTRACT: The effects of soil moisture and temperature on arthropod communi. Soil samples were taken at 15 cm intervals up to 90 cm depth and soil moisture content was measured gravimetrically and then depth of irrigation water was determined.

Individual plots were 6m by 20 m and present a micro-relief with a slope of soil samples. Salt stress is one of the environmental factors that greatly limits crop production worldwide because high salt concentrations in the soil affect morphological responses and physiological and metabolic processes, including root morphology and photosynthetic characteristics.

Soil aeration has been reported to accelerate the growth of plants and increase crop yield. Soil moisture and its availability to support plant growth is a primary factor in farm productivity. Too little moisture can result in yield loss and plant death.

Too much causes root disease and wasted water. Just as important, water is a delivery mechanism for any nutrients that are not tightly bound to the soil. yield. Soil water potential or the amount of water available in the soil also controls the rate of germination and emergence.

When the soil moisture content is low or has low soil water potential, the rate of germination is delayed, seeds may become infected with pathogens, and the stands will be thin with weakened plants.

The effect of soil moisture and temperature on soil nitrate, ammonium, and carbon dioxide can determine the accuracy of prediction for nitrogen availability (Clark, ). A soil health test conducted by V6 growth stage would be useful in corn production to allow farmers to adjust the amount of additional nitrogen to apply according to the soil.

correlations among Mr, moisture variation, and soil suction. The proposed procedures are significantly time-efficient than the existing procedures. Objectives The primary objective of the present study is to evaluate the effect of moisture changes and soil suctions on the resilient modulus of typical subgrade soils in Oklahoma.

This will be. adequate soil moisture in the crop root zone for healthy plant growth and optimum yield. This publication provides informa-tion on the potentially negative impacts excess water or wet soil can have on crop growth and yield, soil oxygen, and the carbon dioxide concentration balance.

The impact of excess water on crop growth and yield is. Soil moisture influences nutrient uptake by plants Aparna Misra in the soil solution. I have studied the effect of seven different levels of soil moisture on two different plant species in a greenhouse.

I studied one herb, Veronica spicata, and one grass, Phleum phleoides. These species are able to grow on limestone soil (which is generally. Soil constitutes a major storage for heat, acting as a reservoir of energy during the day and source of heat to the surface at night.

The soil stores energy during the warm season and releases it to air during the cold season Geiger et al. 1 The temperature of the soil depends on the ratio of the energy absorbed to that lost from the soil. It fluctuates annually and daily, affected mainly by.

Abstract. A field experiment was conducted during kharif season of at Cotton Research Unit, Central Research Station, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra, to study the effect of moisture conservation techniques and fertilizer management on yield and uptake of cotton under high density planting system.

nutrient uptake of woody species under soil flooding has been investigated (Pezeshki, ; Kozlowski, and the references cited therein), nutrient uptake of seedlings of bottomland tree species under reducing soil conditions need further studies because much of the previous work did not quantify the intensity of soil reduction (Eh conditions).

Experiment was conducted to study the effects of soil sodicity (ESP, and ) on growth, nutrients uptake and biochemical responses of plants Ammi majus L during Nov to May Growth (height, branching and flowering) observations were taken at. The distribution of 14 C into other plant parts was also increased at higher rates of K + application under both soil moisture regimes.

Thus, application of K + seems to have a beneficial effect in overcoming soil moisture stress and increasing physiological parameters and carbon partitioning in these two important tropical food legumes.The objective of this study was to evaluate plant uptake of a sulfonamide-class antibiotic, sulfamethazine, in corn (Zea mays L.), lettuce (Lactuca sativa L.), and potato (Solanum tuberosum L.) grown in a manure-amended soil.

The treatments were 0, 50, and μg sulfamethazine mL .THE EFFECT OF EXTREME SOIL ACIDITY ON THE NUTRIENT UPTAKE AND PHYSIOLOGY OF PLANTS I.

H. Rorison Nature Conservancy Grassland Research Unit, Department of Botany, University Sheffield, United Kingdom INTRODUCTION Since the eighteenth century botanists have been aware that the chemical nature of soil affects plant growth and distribution.