scholarly journals Apple Δ13C Discrimination Is Related to Shoot Ash Content

HortScience ◽  
2011 ◽  
Vol 46 (2) ◽  
pp. 213-216 ◽  
Author(s):  
D. Michael Glenn ◽  
Carole Bassett
Keyword(s):  
Leaf Area ◽  
Ash Content ◽  
Yearly Variation ◽  
Area Index ◽  
Grassland Species ◽  
Malus Sieversii ◽  
Period 2 ◽  
Highly Correlated ◽  
Relationship Of ◽  
The Relationship

Plant ash content has been highly correlated with plant water use efficiency (WUE) and Δ13C (Δ) in field crops and grassland species and proposed as a selection criteria for WUE. δ18O (δ) has also been correlated with transpiration in herbaceous plants. The objectives of the study were to 1) evaluate the relationship of shoot ash (ASH) with Δ and δ in ‘Empire’ apple over a 3-year period; 2) determine if yearly variation significantly affected the relationship of ASH with Δ and δ; and 3) evaluate the value of the relationship between ASH content with Δ and δ for a population of Malus sieversii. ‘Empire’ leaf area index (LAI) was negatively correlated with ASH content and positively correlated with Δ. Δ was negatively correlated with ‘Empire’ ASH. There were no yearly effects at a site. Within the Malus sieversii accessions, there was a grouping based on ASH that could be identified and this outlier group also had the lowest δ of the accessions. There were no correlations of leaf area, number, length, width, or stomata number with δ, Δ, or ASH for the Malus sieversii accessions. Rather than a substitute for Δ measurement in assessing WUE, ash content analysis adds an additional dimension to understanding the dynamics of WUE in apple. This work has identified a unique population of Malus meriting further study.

On the relationship of NDVI with leaf area index in a deciduous forest site

2005 ◽  
Vol 94 (2) ◽  
pp. 244-255 ◽  
Author(s):  
Quan Wang ◽  
Samuel Adiku ◽  
John Tenhunen ◽  
André Granier
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Deciduous Forest ◽  
Forest Site ◽  
Area Index ◽  
Relationship Of ◽  
The Relationship

scholarly journals Relating X-band SAR Backscattering to Leaf Area Index of Rice in Different Phenological Phases

2019 ◽  
Vol 11 (12) ◽  
pp. 1462 ◽  
Author(s):  
Sonia Asilo ◽  
Andrew Nelson ◽  
Kees de Bie ◽  
Andrew Skidmore ◽  
Alice Laborte ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Linear Relationship ◽  
Leaf Area ◽  
P Value ◽  
Area Index ◽  
Dynamic Relationship ◽  
Reproductive Phase ◽  
X Band ◽  
Relationship Of ◽  
The Relationship

The objective of this study is to provide complete information on the dynamic relationship between X-band (3.11 cm) backscattering intensity (σ°) and rice crop’s leaf area index (LAI) at all growth phases. Though the relationship between X-band σ° and LAI has been previously explored, details on the relationship at the reproductive phase remain unstudied. LAI at the reproductive phase is important particularly at the heading stage where LAI reaches its maximum as it is closely related to grain yield, and at flowering stage where the total leaf area affects the amount of photosynthates. Therefore, this study examined the relationship of increasing LAI (vegetative to reproductive phase) and decreasing LAI (ripening phase) with TerraSAR-X (TSX) ScanSAR (3.11 cm) σ° at HH polarisation and 45° incidence angle. The results showed a statistically significant (R2 = 0.51, p value < 0.001) non-linear relationship of LAI with σ° at the vegetative to reproductive phase while no significant linear relationship was found at the ripening phase. This study completes the response curve of X-band σ° to LAI by filling in the information on the reproductive phase which more accurately characterises the dynamic relationship between the rice crop’s LAI and X-band’s σ°. This contributes to improved knowledge on the use of X-band data for estimating LAI for the whole crop cycle which is essential for the modelling of crop growth and estimation of yield.

scholarly journals Assessment of ratoonability of short-duration pigeonpea genotypes

1996 ◽  
Vol 127 (3) ◽  
pp. 331-335 ◽  
Author(s):  
Y. S. Chauhan ◽  
C. Johansen ◽  
S. C. Gupta
Keyword(s):  
Leaf Area ◽  
Short Duration ◽  
Cajanus Cajan ◽  
Andhra Pradesh ◽  
Total Yield ◽  
Area Index ◽  
Main Crop ◽  
Relationship Of ◽  
The Relationship ◽  
Crop Maturity

SUMMARYThe extent of variation in ratoonability was examined in a range of recently bred short-duration pigeonpea [Cajanus cajan (L.) Millsp.] genotypes in 1989/90, 1990/91 and 1991/92 at the ICRISAT Asia Center, Andhra Pradesh, India. Traits with which this variation could be associated were assessed. Differences in the total ratoon yield of two flushes were significant among the genotypes in each season. In a few genotypes, ratoon yield constituted 50% of the total yield, which could be as high as 5·6 t/ha. Total ratoon yield was positively correlated with leaf area index in the last 2 years of experimentation. The relationship of total ratoon yield to main crop yield was significantly positive in 1991/92 only. The results suggest that there is a large variation in ratoonability among short-duration genotypes and that high leaf area retention at main crop maturity appears to contribute substantially to this variation.

Relationship of Manifest Aggressiveness to Aggressive Word Associations

1969 ◽  
Vol 25 (3) ◽  
pp. 711-714 ◽  
Author(s):  
Russell G. Geen ◽  
Robert George
Keyword(s):  
Verbal Behavior ◽  
Social Desirability ◽  
Habit Strength ◽  
Self Report ◽  
Social Desirability Scale ◽  
Word Associations ◽  
Highly Correlated ◽  
Cue Words ◽  
Relationship Of ◽  
The Relationship

A self-report inventory made up of items from the Buss-Durkee manifest aggressiveness scales, the Marlowe-Crowne Social Desirability Scale, and the Masculinity-Femininity scale of the Guilford-Zimmerman Temperament Survey was administered to 72 men along with a test of verbal associations to aggressive and neutral cue words. The number of aggressive associations made to aggressive cue words was highly correlated with over-all manifest aggressiveness and with two of the aggressiveness subscales. The results were discussed in terms of the relationship of aggressiveness habit strength to verbal behavior.

Comparison of Two Sociometric Devices for Measuring Personality Integration

1971 ◽  
Vol 29 (3_suppl) ◽  
pp. 1035-1039
Author(s):  
Logan Wright
Keyword(s):  
Locus Of Control ◽  
The Other ◽  
Self Concept ◽  
College Age ◽  
Functional Measure ◽  
Personality Integration ◽  
Validity Measures ◽  
Highly Correlated ◽  
Relationship Of ◽  
The Relationship

A comparison was made of two sociometric measures of personality integration. Contrary to prediction, the more brief, 6-item PIRT scale was significantly more reliable ( r11 = .84) than the lengthier 30-item ESD scale ( r11 = .74). Also contrary to prediction, neither test was more highly correlated than the other (and therefore more valid) with any of 8 construct-validity measures. It was concluded that the PIRT was the more functional measure and therefore recommended for use in future personality integration research. Earlier results concerning the relationship of personality integration to self-concept and environmental contact, as well as locus of control and locus of evaluation in college-age females, were replicated.

scholarly journals A Possible Relationship Between Toxicity and Carcinogenicity

1986 ◽  
Vol 5 (2) ◽  
pp. 137-151 ◽  
Author(s):  
L. Zeise ◽  
E. A.C. Crouch ◽  
R. Wilson
Keyword(s):  
Acute Toxicity ◽  
National Cancer Institute ◽  
Chronic Toxicity ◽  
Positive Finding ◽  
National Toxicology Program ◽  
Technical Report Series ◽  
Technical Report ◽  
Highly Correlated ◽  
Relationship Of ◽  
The Relationship

Carcinogenic response is compared to noncarcinogenic toxicity in that group of chemicals tested by the National Cancer Institute (NCI) and National Toxicology Program (NTP) between 1976 and 1982 and reported in the Carcinogenesis Technical Report Series. A positive finding of carcinogenicity in the bioassay is correlated with the degree of noncarcinogenic chronic toxicity of the dose applied. Comparisons of acute toxicity (LD50) with carcinogenic potency show that they are correlated, but the correlation may in part be an artifact, since doses used in the NCI/NTP carcinogenesis bioassays are toxic and because reliable measures of potency can only be derived for positive carcinogenic responses. The high correlations for certain classes of chemicals and the relationship of chronic toxicity to positive carcinogenic finding suggest that these relationships are more than spurious. Since toxicities in different species are highly correlated, these findings imply that carcinogenicities in different species are also correlated.

Relationship between tillering and leaf area index: quantifying critical leaf area index for tillering in rice

2002 ◽  
Vol 138 (3) ◽  
pp. 269-279 ◽  
Author(s):  
X. ZHONG ◽  
S. PENG ◽  
J. E. SHEEHY ◽  
R. M. VISPERAS ◽  
H. LIU
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Planting Density ◽  
Coefficient Of Determination ◽  
Area Index ◽  
N Input ◽  
Major Factors ◽  
The Relationship ◽  
Changing Light ◽  
Input Level

A field study was conducted at the International Rice Research Institute (IRRI), Philippines during the dry seasons of 1997 and 1998 under irrigated conditions. The objectives of this study were to quantify the critical leaf area index (LAIc) at which tillering stops based on the relationship between tillering rate and LAI, and to determine the effect of nitrogen (N) on LAIc in irrigated rice (Oryza sativa L.) crop. Results showed that the relative tillering rate (RTR) decreased exponentially as LAI increased at a given N input level. The coefficient of determination for the equation quantifying the RTR-LAI relationship ranged from 0·87 to 0·99. The relationship between RTR and LAI was affected by N input level, but not by planting density. The N input level had a significant effect on LAIc with a high N input level causing an increase in LAIc. Tillering stopped at LAI of 3·36 to 4·11 when N was not limiting. Under N limited conditions LAIc reduced to as low as 0·98. Transplanting spacing and number of seedlings per hill had little effect on LAIc. Results from this study suggest that LAI and plant N status are two major factors that influence tiller production in rice crops. The possibility that LAI influences tillering by changing light intensity and/or light quality at the base of the canopy where tiller buds and young tillers are located is discussed.

Monte Carlo Study of Dispersive Transport in Glassy Electrolytes

1994 ◽  
Vol 369 ◽  
Author(s):  
D. Knödler ◽  
P. Pendzig ◽  
W. Dieterich
Keyword(s):  
Monte Carlo ◽  
Lattice Gas ◽  
Monte Carlo Study ◽  
Power Laws ◽  
Dispersive Transport ◽  
Coulombic Interactions ◽  
Highly Correlated ◽  
Relationship Of ◽  
The Relationship ◽  
Network Glasses

AbstractA lattice-gas model is presented, where ions are diffusing in an energy landscape due to immobile, randomly placed counterions. All Coulombic interactions are taken into account.By Monte Carlo simulations we obtain the ac-conductivity, which shows strong dispersion in the form of power-laws. In a separate study we investigate a restricted model, where long-range diffusion is suppressed. These calculations suggest that the response at high frequencies can be interpreted in terms of highly correlated, local motions of dipolar character. Conductivity exponents n1 near unity or even exceeding unity arefound in that regime. We discuss the relationship of these results to experiments on ionic transport in alkali-doped network glasses.

Sign in / Sign up

Export Citation Format

Share Document