Dry matter production in 40-year-old Pinusbanksiana stands in Quebec

1976 ◽  
Vol 6 (3) ◽  
pp. 357-367 ◽  
Author(s):  
Rene Doucet ◽  
John V. Berglund ◽  
C. Eugene Farnsworth
Keyword(s):  
Dry Matter ◽  
Basal Area ◽  
Stand Density ◽  
Stem Bark ◽  
Dry Matter Production ◽  
Regression Equations ◽  
Annual Increment ◽  
Stem Wood ◽  
Matter Production ◽  
Stand Density Index

Dry matter production data were obtained for jack pine (Pinusbanksiana Lamb.) stands growing at three density levels on two sites. Regression equations relating tree weight to diameter and height were calculated for stem wood, stem bark, branches, needles, cones, and total aboveground biomass, as well as for periodic net annual increment of these components. Different sets of equations were needed to evaluate biomass on each site, but density levels within sites could be grouped. Total net periodic annual weight increment was linearly related to foliage weight and basal area, but a levelling-off at higher densities was evident when basal area was replaced by stand density index or bole area equivalent as the measure of density.

The domestication of the native grasses Danthonia richardsonii Cashmore and Danthonia linkii Kunth for agricultural use. II. Agronomic and morphologic variation

1993 ◽  
Vol 44 (1) ◽  
pp. 79 ◽  
Author(s):  
GM Lodge ◽  
AJ Schipp
Keyword(s):  
Seed Production ◽  
Dry Matter ◽  
Basal Area ◽  
Morphological Characters ◽  
Dry Matter Production ◽  
Plant Variety ◽  
Matter Production ◽  
Morphologic Variation ◽  
Agricultural Use ◽  
Seed Yields

Seven accessions of Danthonia richardsonii Cashmore and three plants of Danthonia linkii Kunth, selected for high inflorescence seed yield were further assessed in a comparative field experiment at Tamworth, N.S.W. The agronomic and morphological variation of these lines, three unselected native ecotypes and D. richardsonii cv. Hume also were examined as part of the process of identifying lines that met the criteria for registration in the schemes operated by the Registrar of Plant Variety Rights and the Registrar of Australian Herbage Plant Cultivars. Thirty plants of each line were planted in spaced nursery rows (1x1 m) on a black earth soil in July 1990 and agronomic and morphological characters were assessed in 1990-92. From these data the D. richardsonii accession T487 and D. linkii T28 were chosen to be registered as D. richardsonii cv. Taranna and D. linkii cv. Bunderra. cv. Taranna had higher (P < 0.05) seed production than all other D. richardsonii accessions, except T489. It was distinguishable from the latter accession by its significantly wider inflorescence. Compared with cv. Hume, the only other known cultivar of D. richardsonii, cv. Taranna had higher dry matter production in spring (P < 0.05), higher seed production, flowered earlier and had a shorter and wider inflorescence (P < 0.05) with a wider glume. It also differed from cv. Hume in having longer and wider (P < 0.05) flag and third tiller-leaves. There are no known cultivars of D. linkii. Compared with the accessions it was tested against, cv. Bunderra had significantly higher seed yields and dry matter production. It was also distinct from those accessions in having a higher number of reproductive tillers, a larger basal area and longer and wider flag and third tiller-leaves (P < 0.05).

Field pea cultivar and weed response to crop seed rate in western Canada

1994 ◽  
Vol 74 (2) ◽  
pp. 387-393 ◽  
Author(s):  
L. Townley-Smith ◽  
A. T. Wright
Keyword(s):  
Dry Matter ◽  
Growth Habit ◽  
Stand Density ◽  
Field Pea ◽  
Dry Matter Production ◽  
Herbicide Application ◽  
Seed Rate ◽  
Pisum Sativum L ◽  
Matter Production ◽  
Long Stem

Weed competition is a serious limitation to field pea (Pisum sativum L.) production. Trials were conducted in northeastern Saskatchewan to determine the effects of field pea growth habit, stand density and herbicide treatments on weed growth and on field pea stand and yield. Century, a long-stem leafy type, Tipu, a long-stem semi-leafless type, and Express, a short-stem leafy type, were seeded at 6, 12, 25, 50 and 100 seeds m−2. Some of each cultivar was unsprayed sprayed with a sethoxydim-metribuzin tank-mix for control of grass and broadleaf weeds. Field pea growth habit (cultivar) did not affect number of weeds, but increasing stand density (seed rate) reduced weed numbers in all 3 yr. Express reduced above-ground dry matter production of broadleaf weeds in 1988 and 1991. Increasing seed rate reduced above-ground dry matter production of weeds in all 3 yr. Field pea yield increased with increasing seed rate to a rate between 50 and 100 seeds m−2. Herbicide application reduced weed dry matter production, with the largest effect at low field pea populations. Despite differences in growth habit, the three cultivars competed similarly with weeds. High populations of field peas competed well with weeds and may not require herbicide application, but if producers retain thin stands, good weed control will be critical to attaining high crop yield. Key words: Field pea, Pisum sativum L., seed rate, weed competition, growth habit

Changes in tiller and tussock characteristics of Astrebla lappacea (curly Mitchell grass) after burning.

1983 ◽  
Vol 5 (1) ◽  
pp. 13 ◽  
Author(s):  
JC Scanlan
Keyword(s):  
Dry Matter ◽  
Basal Area ◽  
Tiller Number ◽  
Dry Matter Production ◽  
Axillary Shoots ◽  
North West ◽  
Matter Production

Tiller and tussock characteristics of Astrebla lappacea (curly Mitchell grass) were studied at nine locations burnt by wildfires in north-west Queensland. Tussock number increased after burning although basal area was not affected. New tiller number (per quadrat) was not related to either tussock basal area or post-fire rainfall on burnt plots. Production of new tillers in unburnt plots was inversely related to the number of old tillers. New and old tiller weights were negatively related to tiller number per unit basal area. New tillers from burnt plots had higher 1eaf:stem ratios than new tillers and axillary shoots from old tillers in the unburnt plots. Dry matter production, two years after burning, was similar in burnt and unburnt plots despite the presence of more old tillers and fewer new tillers in the areas burnt by wildfires. Most tillers died within three years of being produced.

Dry matter production of green pea influenced by herbicides

2005 ◽  
Vol 33 (1) ◽  
pp. 377-380
Author(s):  
Erzsébet Nádasy ◽  
Gábor Wágner
Keyword(s):  
Dry Matter ◽  
Dry Matter Production ◽  
Matter Production ◽  
Green Pea

Effects of Drought Stress on Physiological Characteristics and Dry Matter Production in Maize Silking Stage

2013 ◽  
Vol 38 (10) ◽  
pp. 1884-1890 ◽  
Author(s):  
Ren-He ZHANG ◽  
Dong-Wei GUO ◽  
Xing-Hua ZHANG ◽  
Hai-Dong LU ◽  
Jian-Chao LIU ◽  
...  
Keyword(s):  
Drought Stress ◽  
Dry Matter ◽  
Physiological Characteristics ◽  
Dry Matter Production ◽  
Matter Production ◽  
Effects Of Drought

Effects of Soil Tillage Practice on Dry Matter Production and Water Use Effi-ciency in Wheat

2011 ◽  
Vol 37 (8) ◽  
pp. 1432-1440
Author(s):  
Cheng-Yan ZHENG ◽  
Shi-Ming CUI ◽  
Dong WANG ◽  
Zhen-Wen YU ◽  
Yong-Li ZHANG ◽  
...  
Keyword(s):  
Water Use ◽  
Dry Matter ◽  
Soil Tillage ◽  
Dry Matter Production ◽  
Tillage Practice ◽  
Matter Production ◽  
Effi Ciency

Dry Matter Production and Rate of Change of Harvest Index at High Temperature in Peanut

Crop Science ◽  
2002 ◽  
Vol 42 (1) ◽  
pp. 146 ◽  
Author(s):  
P. Q. Craufurd ◽  
P. V. Vara Prasad ◽  
R. J. Summerfield
Keyword(s):  
High Temperature ◽  
Harvest Index ◽  
Dry Matter ◽  
Rate Of Change ◽  
Dry Matter Production ◽  
Matter Production

scholarly journals Dry matter production of perennial ryegrass swards following varying levels of poaching damage on a free-draining earth soil

2010 ◽  
Vol 1 (1) ◽  
pp. 83-83 ◽  
Author(s):  
G Tuñon ◽  
E Kennedy ◽  
D Hennessy ◽  
P Kemp ◽  
N Lopez Villalobos ◽  
...  
Keyword(s):  
Perennial Ryegrass ◽  
Dry Matter ◽  
Dry Matter Production ◽  
Matter Production
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