Spelling suggestions: "subject:"growthrate"" "subject:"growthrates""
1 |
Factors limiting productivity and adoption of rubber tea intercropping in the low country wet zone of Sri LankaIqbal, S. M. M. January 2003 (has links)
No description available.
|
2 |
Studies of the genetic control of grain growth and the pattern of amyloplast DNA accumulation during the endosperm development in wheatCatley, Merryn Anne January 1988 (has links)
No description available.
|
3 |
Inter-Correlations Between Growth Rates of Conifers in Northern New EnglandLyon, Charles J. 01 1900 (has links)
No description available.
|
4 |
Studies on the control of growth in the developing chick limbWilde, S. M. January 1988 (has links)
No description available.
|
5 |
Studies in catch-up growth in the rat skeletonLewis, S. J. January 1987 (has links)
No description available.
|
6 |
A physiological and morphological analysis of the effects of nitrogen supply on the relative growth rates of nine loblolly pine (Pinus taeda L.) clonesStover, Corey Michael 16 August 2006 (has links)
The influence of nitrogen supply on relationships of relative growth rate (RGR) to leaf physiology, structural and non-structural carbon partitioning, and nitrogen- and water-use efficiencies were examined in loblolly pine (Pinus taeda L.) clonal lines differing in growth potential. Nine 18-month-old loblolly pine clones were grown in a climate-controlled greenhouse for 20 weeks under two contrasting nitrogen (N) regimes (50 and 250 ppm) and a growth analysis was carried out. Higher nitrogen increased plant RGR and largely resulted in proportional shifts in biomass from roots and stems to needles. The RGR of plants receiving higher nitrogen was increased primarily through increased leaf area ratio (LAR), which was increased through higher leaf mass fraction (LMF) and not through changes in needle morphology. Although concentrations of needle glucose in plants receiving 250 ppm N were 22 percent higher than plants receiving lower N, total non-structural carbohydrate concentrations in needles of plants receiving 50 ppm N were nearly double that of clones receiving 250 pm N, primarily due to starch accumulation of the nitrogen-deficient plants. Plants receiving 250 ppm N also had 39 and 18 percent lower starch in the coarse and fine roots, respectively. Plants receiving higher nitrogen were also more water-use efficient, but had lower photosynthetic nitrogen-use efficiency. LAR, net assimilation rate (NAR), specific leaf area (SLA), and LMF were all positively correlated with RGR, but the main influence on RGR differences among clones was LAR. In addition, leaf-level rates of photosynthesis and respiration were positively correlated with RGR; however, faster-growing clones did not exhibit greater carbon economy at the leaf level. Both instantaneous water-use efficiency (A/E) and δ13C were positively correlated with RGR and photosynthetic nitrogen-use efficiency was negatively correlated with RGR. The identification of physiological and morphological traits underpinning differences in RGR among clones and how these traits are affected by nitrogen supply provides new information on trait correlations within species and parallels broader patterns observed among species.
|
7 |
A physiological and morphological analysis of the effects of nitrogen supply on the relative growth rates of nine loblolly pine (Pinus taeda L.) clonesStover, Corey Michael 16 August 2006 (has links)
The influence of nitrogen supply on relationships of relative growth rate (RGR) to leaf physiology, structural and non-structural carbon partitioning, and nitrogen- and water-use efficiencies were examined in loblolly pine (Pinus taeda L.) clonal lines differing in growth potential. Nine 18-month-old loblolly pine clones were grown in a climate-controlled greenhouse for 20 weeks under two contrasting nitrogen (N) regimes (50 and 250 ppm) and a growth analysis was carried out. Higher nitrogen increased plant RGR and largely resulted in proportional shifts in biomass from roots and stems to needles. The RGR of plants receiving higher nitrogen was increased primarily through increased leaf area ratio (LAR), which was increased through higher leaf mass fraction (LMF) and not through changes in needle morphology. Although concentrations of needle glucose in plants receiving 250 ppm N were 22 percent higher than plants receiving lower N, total non-structural carbohydrate concentrations in needles of plants receiving 50 ppm N were nearly double that of clones receiving 250 pm N, primarily due to starch accumulation of the nitrogen-deficient plants. Plants receiving 250 ppm N also had 39 and 18 percent lower starch in the coarse and fine roots, respectively. Plants receiving higher nitrogen were also more water-use efficient, but had lower photosynthetic nitrogen-use efficiency. LAR, net assimilation rate (NAR), specific leaf area (SLA), and LMF were all positively correlated with RGR, but the main influence on RGR differences among clones was LAR. In addition, leaf-level rates of photosynthesis and respiration were positively correlated with RGR; however, faster-growing clones did not exhibit greater carbon economy at the leaf level. Both instantaneous water-use efficiency (A/E) and δ13C were positively correlated with RGR and photosynthetic nitrogen-use efficiency was negatively correlated with RGR. The identification of physiological and morphological traits underpinning differences in RGR among clones and how these traits are affected by nitrogen supply provides new information on trait correlations within species and parallels broader patterns observed among species.
|
8 |
The synecology and autecology of selected woodland groundfloraWolfenden, Elizabeth Ann January 1979 (has links)
No description available.
|
9 |
Factors affecting the selectivity of composts suitable for the cultivation of Agaricus speciesSmith, Jeffrey Francis January 1994 (has links)
No description available.
|
10 |
The growth of school children from the subcontinent of India living in LeicestershirePeters, Jean January 1987 (has links)
Using data from the Leicestershire Growth Study, which was established in 1981, this thesis sets out to evaluate the growth of children in Leicestershire and to highlight any differences which may exist between those children indigenous to Great Britain and those whose families have emigrated from the subcontinent of India. The latter population can be subdivided further, i.e. peoples from the countries of India, Bangladesh and Pakistan, the first group primarily, having either migrated from India directly to this country or having spent an interim period in East Africa, and into adherents of the Muslim, Hindu or Sikh faiths. Seven anthropometric parameters, selected to represent skeletal and soft tissue components of the body, and whose dimensions reflect best the changing patterns of growth with age and environmental factors, were measured on 3775 children aged from 3-10 years inclusive. There are distinct anthropometric differences between the indigenous population and that from the Indian subcontinent, with the indigenous population having greater skeletal dimensions, e.g. stature, head circumference, and differences in body composition, reflected in greater weight. These ethnic differences appear to have been exacerbated by religious factors which impinge upon both genotype and phenotype by imposition of their respective individual cultures:, involving such factors as dietary intake and marriage customs, resulting in the Indian Sikh children resembling more closely the indigenous population than do the Hindus and Muslims. Other environmental factors such as length of time of residence in this country, or period of time spent in East Africa appear to have had some impact upon growth, since the Indians in Leicestershire are taller and heavier than their counterparts still resident in India. Finally, it is recommended that some of the growth charts in current use in Great Britain be modified for use with certain groups of children from the Indian subcontinent.
|
Page generated in 0.0269 seconds