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Article
Effects of Climate, Land Management, and Sulfur Deposition on Soil Base Cation Supply in National Forests of the Southern Appalachian Mountains
Forest soils having low exchangeable calcium (Ca) and other nutrient base cation (BC) reserves may induce nutrient deficiencies in acid-sensitive plants and impact commercially important tree species. Past and...
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Chapter and Conference Paper
Size of Broadcast in Threshold Schemes with Disenrollment
Threshold schemes are well-studied cryptographic primitives for distributing information among a number of entities in such a way that the information can only be recovered if a threshold of entities cooperate...
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Article
Crown Condition and Nutrient Status of Red Spruce (Picea Rubens Sarg.) in West Virginia
The appearance, foliar nutrient status, and soil nutrient availability were determined for 9 trees in each of 39 red spruce stands in West Viginia. Visual evaluation of crown conditions for all 351 trees sampl...
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Article
Inhibition of nitrate uptake by aluminium in maize
Experiments with two maize (Zea mays L.) hybrids were conducted to determine (a) if the inhibition of nitrate uptake by aluminium involved a restriction in the induction (synthesis/assemblage) of nitrate transpor...
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Article
Relations between two perfect ternary sequence constructions
Both R. Games [4] and V.P. Ipatov [8] have given constructions for perfect ternary sequences. Games uses difference sets and quadrics in projective space, while Ipatov uses q-ary m-sequences. We show that the Ipa...
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Article
Elations and symmetric designs having projective subspaces
Consider symmetric 2-designs D which have an automorphism group G containing ‘sufficiently many’ elations. This paper investigates the case where there are the ‘least’ number of elations. Under certain assumption...
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Article
On the elation structure of specific designs
Consider symmetric 2-designs D which have an automorphism group G containing ‘sufficiently many’ elations. This paper proves that all elations in G have the same order and classifies the elation structure (i.e. c...
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Article
Aluminum inhibition of shoot lateral branches ofGlycine max and reversal by exogenous cytokinin
Aluminum effects on the morphological development of soybean (Glycine max (L.) Merr.) were characterized in greenhouse and growth chamber experiments. An Al-sensitive cultivar, ‘Ransom’, was grown in an acid soil...
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Article
Partitioning of reduced nitrogen derived from exogenous nitrate in maize roots: Initial priority for protein synthesis
When roots of five day-old maize seedlings were exposed to15N-nitrate, a constant (25–29%) proportion of the reduced15N derived from the entering15N-nitrate accumulated as insoluble15N nitrogen. Constancy was est...
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Chapter
Partitioning of reduced nitrogen derived from exogenous nitrate in maize roots: Initial priority for protein synthesis
When roots of five day-old maize seedlings were exposed to 15N-nitrate, a constant (25–29%) proportion of the reduced 15N derived from the entering 15N-nitrate accumulated as insoluble 15N nitrogen. Constancy was...
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Article
Partitioning of previously-accumulated nitrate to translocation, reduction, and efflux in corn roots
The effect of nitrate uptake, or its absence, on the utilization of nitrate previously accumulated by dark-grown, decpitated maize (Zea mays L., cv. DeKalb XL-45) seedlings was examined. Five-d-old plants that ha...
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Article
Daily changes in nitrate influx, efflux and metabolism in maize and pearl millet
Maize (Zea mays L.) and pearl millet (Pennisetum americanum (L.) Leeke) seedlings were exposed to [15N]nitrate for 1-h periods at eight times during a 24-h period (16–8 h light-dark for maize; 14–10 h for millet)...
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Chapter
Nitrate Transport Processes and Compartmentation in Root Systems
During normal growing conditions, most higher plants in the vegetative stage tend to accumulate nitrate in the unreduced form in their root tissues and in their above-ground conducting tissues. Under certain s...
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Article
Calcium and magnesium in ryegrass some differences in accumulation by roots and in translocation to shoots
Thirty-day old intact ryegrass plants (Lolium perenne) were exposed to solutions of Ca, Mg, or Ca+Mg. Each ion was present at 0.25 mM and each solution was labeled with an appropriate radioisotope (Ca45 or Mg28)....
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Article
Nitrate influx and efflux by intact wheat seedlings: Effects of prior nitrate nutrition
Wheat (Triticum vulgare L., cv. Blueboy) seedlings, grown with 0.25, 1.0 and 15 mM nitrate in complete nutrient solutions, were transferred 10 days after germination to 1.0 mM K15NO3 (∼99 A% 15N) plus 0.1 mM CaSO
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Article
The omega transformation in Hf-Nb alloys
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Article
Nitrate reduction in the roots and shoots of wheat seedlings
Intact wheat seedlings cultured in high nitrate solutions (high-NO 3 - cultures) reduced NO 3 - when placed ...
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Article
The influence of ammonium on nitrate reduction in wheat seedlings
Ammonium markedly inhibited nitrate absorption by nitrogenstarved wheat seedlings but did not decrease the proportion of absorbed nitrate that was reduced. Seedlings high in nitrate (absorbed prior to the expe...
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Article
Oxygen Uptake by Illuminated Maize Leaves
EFFICIENT apparent photosynthesis and high rates of accumulation of dry matter in maize and other tropical grasses have been attributed to a lack of respiratory activity during illumination. Low CO2 compensation ...
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Article
Effect of Calcium and Strontium on the Preferential Formation of an Adenosine Triphosphatase in Wheat Roots
THERE are a number of factors which may induce the formation of a specific enzyme in living tissue homogenates1. In kee** within the definition established in ref. 1, the prefix ‘induced’ restricts the type of ...
