Predicting Peak Standing Crop on Annual Range Using Weather Variables

1989 ◽  
Vol 42 (6) ◽  
pp. 508 ◽  
Author(s):  
Melvin R. George ◽  
William A. Williams ◽  
Neil K. McDougald ◽  
W. James Clawson ◽  
Alfred H. Murphy
Keyword(s):  
Standing Crop ◽  
Weather Variables ◽  
Annual Range ◽  
Peak Standing Crop

Estimating above- and below-ground macrophyte production in Scirpus tidal marshes

1988 ◽  
Vol 66 (2) ◽  
pp. 368-374 ◽  
Author(s):  
Jean-François Giroux ◽  
Jean Bédard
Keyword(s):  
Standing Crop ◽  
Belowground Biomass ◽  
Tidal Marshes ◽  
Optimal Size ◽  
Lawrence Estuary ◽  
Plant Parts ◽  
Peak Standing Crop ◽  
Below Ground ◽  
The Difference ◽  
St Lawrence Estuary

Different methods to estimate primary production of Scirpus marshes of the St. Lawrence estuary were compared. Quadrats 25 × 25 cm and cores 10 cm in diameter were found to be the optimal size to sample above- and below-ground standing crops, respectively. Ash content for different plant parts of various species was measured to obtain more accurate estimates of organic matter. A series of allometric equations relating stem height and mass were developed to estimate aerial standing crop from permanent nondestructively sampled plots. This method, however, overestimated standing crop compared with the destructive (harvest) method. The relationship between the above- and below-ground standing crop was also determined for the dominant species and used to predict belowground biomass without destructive sampling. Finally, the Smalley method provided the best estimates of net annual above- and below-ground production when losses attributed to decomposition were not considered. For less intensive studies, however, the methods based on peak standing crop and on the difference between maximum and minimum biomass would yield good approximations of above- and below-ground production.

scholarly journals Spring Precipitation as a Predictor for Peak Standing Crop of Mixed-Grass Prairie

2011 ◽  
Vol 64 (2) ◽  
pp. 215-222 ◽  
Author(s):  
L.J. Wiles ◽  
Gale Dunn ◽  
Jeff Printz ◽  
Bob Patton ◽  
Anne Nyren
Keyword(s):  
Standing Crop ◽  
Spring Precipitation ◽  
Mixed Grass Prairie ◽  
Peak Standing Crop ◽  
Mixed Grass

A Possible Relict Population of Mesodesma deauratum (Turton):Bivalvia (Mesodesmatidae) from the Southeast Shoal, Grand Banks of Newfoundland

1994 ◽  
Vol 51 (5) ◽  
pp. 1162-1168 ◽  
Author(s):  
Michael S. Hutcheson ◽  
Patrick L. Stewart
Keyword(s):  
Standing Crop ◽  
Organic Content ◽  
Grand Banks ◽  
Relict Population ◽  
Single Location ◽  
Size Groups ◽  
Peak Standing Crop ◽  
Wet Weight ◽  
Late Wisconsinan ◽  
External Growth

Extremely dense, localized concentrations of Turton's wedge clam Mesodesma deauratum (Turton) were found in quantitative grab samples on poorly sorted, medium to fine, low organic content sands (total organic carbon < 0.05%) at depths of 44–51 m at a single location on eastern Southeast Shoal of the Grand Banks of Newfoundland. Mean densities ranged from 24 to 5890 individuals∙m−2 and wet weight standing crop from 0 to 21.4 kg∙m−2. A peak standing crop of 69.4 kg∙m−2 was observed in one grab. There was a strong bimodal size distribution (17–27 and 34–56 mm shell length) at the site, but the two size groups never occurred together. Based on external growth checks, the smaller individuals were 4–5 yr old and the larger ones 10 to more than 15 yr. This population is suggested to be a relict of shallow littoral populations which probably existed in the area in the late Wisconsinan glacial period.

scholarly journals Effect of Fire on Mixed-Grass Plant Communities in Badlands National Park

1985 ◽  
Vol 9 ◽  
pp. 6-11
Author(s):  
Steven Whisenant ◽  
Dan Uresk
Keyword(s):  
Plant Communities ◽  
Prescribed Fire ◽  
Standing Crop ◽  
National Park ◽  
Grass Species ◽  
Important Goal ◽  
Mixed Grass Prairie ◽  
Peak Standing Crop ◽  
Mixed Grass ◽  
Badlands National Park

This research has the objective of determining the influence of fire on density and peak standing crop of the major grass species of the Badlands National Park mixed-grass prairie. An important goal is to evaluate the potential of prescribed fire for the control of Japanese brome (Bromus japonicus).

Effects of Stocking Rate on the Variability of Peak Standing Crop in a Desert Steppe of Eurasia Grassland

2013 ◽  
Vol 53 (2) ◽  
pp. 266-273 ◽  
Author(s):  
Zhongwu Wang ◽  
Shuying Jiao ◽  
Guodong Han ◽  
Mengli Zhao ◽  
Haijun Ding ◽  
...  
Keyword(s):  
Standing Crop ◽  
Desert Steppe ◽  
Stocking Rate ◽  
Peak Standing Crop

STANDING CROP NITROGEN CONTENT (FIFE)

1994 ◽  
Author(s):  
T. G. F. KITTEL ◽  
W. J. PARTON ◽  
D. S. SCHIMEL
Keyword(s):  
Nitrogen Content ◽  
Standing Crop
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