Distribution of 14c Label From Cotton Leaves: Consequences of Changed Water and Nitrogen Status.

1982 ◽  
Vol 9 (6) ◽  
pp. 735 ◽  
Author(s):  
GA Constable ◽  
HM Rawson
Keyword(s):  
Nitrogen Nutrition ◽  
Net Photosynthesis ◽  
Distribution Patterns ◽  
Growth Conditions ◽  
Total Carbon ◽  
Plant Performance ◽  
Regression Coefficients ◽  
Nitrogen Status ◽  
The Relationship ◽  
Low Nitrogen

14CO2 was applied to individual cotton leaves and its distribution after 24 h was examined in plants of varying water and nitrogen status. Redistribution patterns as well as leaf net photosynthesis and leaf expansion patterns were also established. Irrespective of growth conditions, phyllotaxis had a marked effect on distribution patterns. For example, fruit in vertical alignment with the labelled leaf received 2-4 times more label than fruit on the opposite side of the mainstem. Distance of a sink from the labelled source, as measured in number of nodes, was also of major importance in well watered plants, the relationship being logarithmic. However, during water stress or low nitrogen nutrition, proportionally more 14C moved to the roots. Furthermore, if plants were stressed slowly, the lower bolls received a greater share of the label than in well watered plants. Analysis of the distribution patterns indicated that empirical regression coefficients considering both phyllotaxis (angle) and distance between source and sink may be of use in simulations of plant performance. Using these regression coefficients and leaf photosynthesis data collected elsewhere, the distribution of total carbon within the cotton plant was calculated.

Leaf nitrogen as a guide for fertilising macadamia

1997 ◽  
Vol 37 (5) ◽  
pp. 599 ◽  
Author(s):  
R. A. Stephenson ◽  
E. C. Gallagher ◽  
V. J. Doogan
Keyword(s):  
Nitrogen Nutrition ◽  
Current Trend ◽  
Leaf Nitrogen ◽  
Nitrogen Status ◽  
Oil Accumulation ◽  
Inflorescence Development ◽  
Experimental Block ◽  
High Yields ◽  
The Relationship ◽  
Low Nitrogen

Summary. Despite the lack of evidence for a critical level of leaf nitrogen in macadamia, fertiliser management has been largely based on tentative standards for high yielding trees. Trees on a lower plane of nitrogen nutrition, however, produced higher yields of good quality nuts. This study was therefore carried out to establish the relationship between yield and nitrogen status of trees. Three rates of nitrogen fertiliser (0.5, 1.5 and 2.5 kg urea/tree . year; 230, 690 and 1150 g nitrogen respectively) were applied to macadamia trees in 1 of 5 application strategies: 1 application in April (floral initiation); 2 applications, one in April and one in June (inflorescence development); 3 applications, April, June and November (rapid nut growth and premature nut drop); 4 applications, April, June, November and January (oil accumulation); and 12 monthly split applications. Multiple applications were all equal in size. The association between high yields and low nitrogen status was confirmed. In some, but not all, years, yield was negatively correlated with leaf nitrogen, accounting for 47 and 59% of the variation in yield of commercially acceptable nuts (>19 mm diameter) in 1991 and 1993, respectively. It is therefore recommended that the standard for leaf nitrogen in macadamia be lowered from 1.4–1.5 to 1.3% under Australian conditions. These results raise concerns at the current trend for leaf nitrogen to be as high as 1.8%. It would be prudent to cease nitrogen applications on at least a small experimental block until leaf nitrogen declined to 1.3% and then maintain this level for at least 3 years and monitor yields.

HUBUNGAN KEPADATAN BIVALVIA DENGAN PARAMETER LINGKUNGAN DI PESISIR TANJUNG PURA KABUPATEN BANGKA TENGAH

2020 ◽  
Vol 13 (2) ◽  
pp. 112-121
Author(s):  
Sudiyar . ◽  
Okto Supratman ◽  
Indra Ambalika Syari
Keyword(s):  
Negative Impact ◽  
Principal Component ◽  
Environmental Parameters ◽  
Data Retrieval ◽  
Distribution Patterns ◽  
Random System ◽  
System Method ◽  
Relationship Of ◽  
The Relationship ◽  
Anadara Granosa

The destructive fishing feared will give a negative impact on the survival of this organism. This study aims to analyze the density of bivalves, distribution patterns, and to analyze the relationship of bivalves with environmental parameters in Tanjung Pura village. This research was conducted in March 2019. The systematic random system method was used for collecting data of bivalves. The collecting Data retrieval divided into five research stasions. The results obtained 6 types of bivalves from 3 families and the total is 115 individuals. The highest bivalve density is 4.56 ind / m², and the lowest bivalves are located at station 2,1.56 ind / m²,  The pattern of bivalve distribution in the Coastal of Tanjung Pura Village is grouping. The results of principal component analysis (PCA) showed that Anadara granosa species was positively correlated with TSS r = 0.890, Dosinia contusa, Anomalocardia squamosa, Mererix meretrix, Placamen isabellina, and Tellinella spengleri were positively correlated with currents r = 0.933.

scholarly journals BREED AND SEX EFFECTS ON THE RELATIONSHIP BETWEEN WEIGHT AND FATNESS IN LACOMBE AND YORKSHIRE SWINE AND THEIR RECIPROCAL CROSSES

1965 ◽  
Vol 45 (1) ◽  
pp. 33-36
Author(s):  
G. W. Rahnefeld
Keyword(s):  
Body Weight ◽  
Sex Differences ◽  
Regression Coefficients ◽  
Average Depth ◽  
Constant Weight ◽  
Reciprocal Crosses ◽  
Sex Effects ◽  
Female Mating ◽  
The Mean ◽  
The Relationship

The relationship between thickness of fat measured at the shoulder, last rib, and loin of live pigs and market weight (86.2 to 95.2 kg) was studied in 1596 pigs from the Lacombe and Yorkshire breeds and their reciprocal crosses. No significant breed or sex differences were found in the proportion of fat at the three sites. Breed and sex differences were evident in the average depth of fat. The regression coefficients for the mean of three fat measurements on market weight were.016 ±.003,.019 ±.007, and.017 ±.004 for Lacombe males, barrows, and females respectively;.039 ±.002,.036 ±.005, and.041 ±.001 for Yorkshire males, barrows and females respectively;.027 ±.005 and.029 ±.004 for barrows and females from the Lacombe male × Yorkshire female mating; and.023 ±.007 and.021 ±.009 for barrows and females from the Yorkshire male × Lacombe female mating. Comparisons between animals measured at a relatively constant weight should be made after the fat measurement is adjusted for variations in body weight. The results of this study indicate that separate corrections should be applied for each breed. Separate corrections for sexes within breeds do not appear warranted.

Scalar properties of Japanese and English sense-based minimizers

2021 ◽  
Vol 6 (1) ◽  
pp. 433
Author(s):  
Osamu Sawada
Keyword(s):  
Distribution Patterns ◽  
Small Degree ◽  
Conventional Implicature ◽  
Personal Taste ◽  
Low Degree ◽  
The Senses ◽  
Scalar Properties ◽  
The Relationship

The Japanese minimizers kasukani ‘faintly’ and honokani ‘approx. faintly’ and the English minimizer faintly are similar to typical minimizers, such as the Japanese sukoshi ‘a bit’ and English a bit, in that they semantically represent a low degree. However, their meanings and distribution patterns are not the same. I argue that kasukani, honokani, and faintly are sense-based minimizers in that they not only semantically denote a small degree but also convey that thejudge (typically the speaker) measures degree based on his/her own sense ( the senses of sight, smell, taste, etc.) at the level of conventional implicature (CI) (e.g., Grice 1975; Potts 2005; McCready 2010; Gutzmann 2011). It will be shown that this characteristic restricts sense-based minimizers to occur only in a limited environment. This paper also shows that there are variations among the sense-based minimizers with regard to (i) the kind of sense, (ii) the presence/absence of evaluativity, and (iii) the possibility of a combination with an emotive predicate, and will explain them in the non-at-issue domain. In analyzing the meaning of sense-based minimizers, the relationship between a sense-based minimizer and a predicate of personal taste (e.g., Pearson 2013; Ninan 2014; Kennedy & Willer 2019; Willer & Kennedy 2019) will also be discussed.

scholarly journals Conditional and marginal relative risk parameters for a class of recursive regression graph models

2018 ◽  
Vol 28 (10-11) ◽  
pp. 3466-3486
Author(s):  
Monia Lupparelli
Keyword(s):  
Relative Risk ◽  
Binary Data ◽  
Oral Morphine ◽  
Regression Coefficients ◽  
Relative Risks ◽  
Morphine Administration ◽  
Gaussian Case ◽  
Regression Graph ◽  
Risk Parameters ◽  
The Relationship

In linear regression modelling, the distortion of effects after marginalizing over variables of the conditioning set has been widely studied in several contexts. For Gaussian variables, the relationship between marginal and partial regression coefficients is well established and the issue is often addressed as a result of W. G. Cochran. Possible generalizations beyond the linear Gaussian case have been developed, nevertheless the case of discrete variables is still challenging, in particular in medical and social science settings. A multivariate regression framework is proposed for binary data with regression coefficients given by the logarithm of relative risks, and a multivariate Relative Risk formula is derived to define the relationship between marginal and conditional relative risks. The method is illustrated through the analysis of the morphine data in order to assess the effect of preoperative oral morphine administration on the postoperative pain relief.

scholarly journals Relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture

2009 ◽  
Vol 44 (8) ◽  
pp. 996-1001 ◽  
Author(s):  
Pedro Rodolfo Siqueira Vendrame ◽  
Robélio Leandro Marchão ◽  
Osmar Rodrigues Brito ◽  
Maria de Fátima Guimarães ◽  
Thierry Becquer
Keyword(s):  
Total Carbon ◽  
Soil Macrofauna ◽  
Exchangeable Calcium ◽  
Exchangeable Ca ◽  
Calcium Magnesium ◽  
Distrito Federal ◽  
Calcium And Magnesium ◽  
Taxonomic Groups ◽  
The Relationship ◽  
Soil Groups

The objective of this work was to assess the relationship between macrofauna, mineralogy and exchangeable calcium and magnesium in Cerrado Oxisols under pasture. Twelve collection points were chosen in the Distrito Federal and in Formosa municipality, Goiás state, Brazil, representing four soil groups with varied levels of calcium + magnesium and kaolinite/(kaolinite + gibbsite) ratios. Soil macrofauna was collected in triplicate at each collection point, and identified at the level of taxonomic groups. Macrofauna density showed correlation with contents of kaolinite, gibbsite and exchangeable Ca + Mg in the soils. Mineralogy and exchangeable Ca + Mg had significant effects on taxonomic groups and relative density of soil macrofauna. The termites (Isoptera) were more abundant in soils with low exchangeable Ca + Mg; earthworms (Oligochaeta), in soils with high levels of kaolinite; and Hemiptera and Coleoptera larvae were more abundant in gibbsitic soils with higher contents of total carbon.

scholarly journals Allometric equation of local bamboo for estimating carbon sequestration of bamboo riparian forest

2021 ◽  
Vol 905 (1) ◽  
pp. 012002
Author(s):  
C Prayogo ◽  
C Muthahar ◽  
R M Ishaq
Keyword(s):  
Land Use ◽  
Carbon Sequestration ◽  
Riparian Forest ◽  
Dry Weight ◽  
Allometric Equation ◽  
Total Carbon ◽  
Destructive Sampling ◽  
Industrial Activities ◽  
Bamboo Stem ◽  
The Relationship

Abstract The cause of global warming is the increasing carbon concentration arising from industrial activities, burning of fossils, and land-use change. The purpose of this research was to find out the allometric equation to calculate the local bamboo biomass and then to be able to calculate how much carbon sequestration at bamboo riparian forest since this area was rarely being explored. The parameters observed were the height and diameter of the bamboo stem at 1.3 m height of 6 types of local bamboo using destructive sampling, along with the measurement of bamboo weight. The carbon content of the bamboo biomass, litter, and soil was measured to complement the estimation of total carbon sequestration. The results showed that the allometric equation for estimating local bamboo biomass is Y=0.6396 X1.6162 with R2=0.77, obtained from the relationship equations between dry weight and the diameter. Total carbon sequestration of this system ranged between 81 to 215 tons C ha−1.

Length-Weight Relationship and Condition Factors of Mullet Fish (Mugil cephalus) Caught at the Waters of Ngurah Rai Grand Forest Park, Bali

2021 ◽  
Vol 5 (1) ◽  
pp. 12
Author(s):  
Dewangga Ari Kusuma Putra ◽  
I Wayan Restu ◽  
I wayan Darya Kartika
Keyword(s):  
Good Condition ◽  
Growth Conditions ◽  
Mugil Cephalus ◽  
Coefficient Of Determination ◽  
Growth Equation ◽  
Microsoft Excel ◽  
K Value ◽  
Forest Park ◽  
Weight Growth ◽  
The Relationship

Grey Mullet fish (Mugil cephalus) is one of the economically valuable fish in the waters of the Ngurah Rai Forest Park, Bali. This study was conducted to examine the relationship between the length and weight of the condition of Belanak fish caught in the waters of the Ngurah Rai Forest Park, Bali. The purpose of this study was to determine the description of the growth conditions of Belanak in the waters of Ngurah Rai Tahura, Bali will create a plan for sustainable management of Belanak Fish resources. Sampling was conducted in March 2019 to May 2019. Data analysis used was the relationship between length and weight and condition factors. Data processing is done by using the Microsoft Excel program. The results obtained showed that the mullet fish has a negative allometric growth pattern (long growth is faster than weight growth) equation W = 0.011 L2.195 and the coefficient of determination (R2) of 0.75 (75% growth in weight is influenced by growth long). Belanak fish caught in Ngurah Rai Tahura waters have a condition factor value (K value) ranging from 0.941 to 1.514 which indicates that Belanak is in good condition and is in its infancy.

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