scholarly journals An Assessment of First and Second Rotations Average Dominant/Codominant Height Growth for Slash Pine Plantations in South Georgia and North Florida

2002 ◽  
Vol 26 (2) ◽  
pp. 61-71
Author(s):  
Charles E. Rose ◽  
Barry D. Shiver
Keyword(s):  
Soil Type ◽  
Growing Season ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
South Georgia ◽  
Growing Seasons ◽  
The North ◽  
The Mean ◽  
Planting Method ◽  
Source Site

Abstract A slash pine (Pinus elliottii Engelm.) successive rotation plantation study was established in 1978–1979 for the north Florida and south Georgia flatwoods. The second rotation duplicated the first rotation seed source, site preparation, planting method and density. The comparison between the two rotations is based on the mean dominant/codominant height differential across a range of soil types and ages. There is a significant rotation 1 minus rotation 2 mean dominant/codominant height difference across the sites for all ages. Rotation 1 is 1.9 and 5.4 ft higher for mean dominant/codominant height at ages 2 and 20. The height differential is generally more significant for the spodosol soil type than the nonspodosol soil type. Rotation 1 generally experienced more favorable precipitation, for both the amount and timing of the precipitation within a year, than rotation 2. Rotation 2 experienced drought events and high growing season average temperatures during the first two growing seasons, while rotation 1 was near normal for this period. The evidence suggests that a main contributor to the decrease in mean dominant/codominant height across the spectrum of plots and age classes is the generally less favorable climatic growing season conditions experienced by rotation 2 relative to rotation 1. South. J. Appl. For. 26(2):61–71.

scholarly journals Loblolly Pine Outperforms Slash Pine in Southeastern Georgia and Northern Florida

2000 ◽  
Vol 24 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Barry D. Shiver ◽  
John W. Rheney ◽  
Kenneth L. Hitch
Keyword(s):  
Loblolly Pine ◽  
Species Interactions ◽  
Basal Area ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Stand Volume ◽  
Growing Seasons ◽  
The Difference ◽  
Stand Basal Area ◽  
Better Than

Abstract A total of 141 paired plot installations remain of the 160 that were planted with slash (Pinus elliottii Engelm.) and loblolly (P. taedaL.) pine across southeastern Georgia and northern Florida, after 14 growing seasons. Installations were evenly distributed across eight soil types. Analyses indicate that loblolly performed equal to or better than slash pine. There were no soil X species interactions. After 14 yr, loblolly pine had significantly higher survival (71% vs. 66%), stand basal area (98 vs. 81 ft2/ac), total stand volume (1857 vs. 1721 ft3/ac), merchantable stand volume (1497 vs. 1310 ft3/ac), total green weight (53 tons vs. 47 tons), and merchantable green weight (45 vs. 35 tons/ac) than slash pine. Growth over the period from age 11 to age 14 was also higher for loblolly than for slash indicating that the difference in the two species is diverging over time. South. J. Appl. For. 24(1): 31-36.

Alternative turnoff strategies for Kimberley beef cattle. 1. Live animal performance and carcass characteristics.

1987 ◽  
Vol 9 (2) ◽  
pp. 61 ◽  
Author(s):  
WJ Ryan ◽  
D Pratchett ◽  
BL McIntyre
Keyword(s):  
Beef Cattle ◽  
Carcass Characteristics ◽  
Growing Season ◽  
Agricultural Area ◽  
Research Station ◽  
Food Conversion ◽  
Live Animal ◽  
Grazing Season ◽  
Growing Seasons ◽  
The North

In June 1980, 190 Kimberley Shorthorn steers from five properties in the Kimberley were divided into three age categories. Half were sent to Chapman Research Station (CRS) in the agricultural area of Western Australia and the remainder stayed at Ord Regeneration Research Station (ORRS) in the Kimberley. Animals in both locations grazed for either one or two pasture growing seasons and a third group was fed a concentrate ration based on grain after the first growing season. Cattle lost between 20-30 kg in handling and transport south which, together with the reduced initial grazing season, led to gains of only 50 kg while those in the north gained around 100 kg. In the second grazing season at both locations animals gained around 140 kg. Animals at ORRS laid down more fat than those at CRS. Animals fed on concentrate rations in the agricultural area grew significantly faster, but had poorer food conversion and were leaner compared with those fed in the Kimberley.

scholarly journals Occurrence of Mycotoxins in Winter Rye Varieties Cultivated in Poland (2017–2019)

Toxins ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 423
Author(s):  
Robert Kosicki ◽  
Magdalena Twarużek ◽  
Paweł Dopierała ◽  
Bartosz Rudzki ◽  
Jan Grajewski
Keyword(s):  
High Frequency ◽  
Growing Season ◽  
Winter Rye ◽  
Fusarium Mycotoxins ◽  
Growing Seasons ◽  
Great Economic Importance ◽  
Secale Cereale L ◽  
Food And Feed ◽  
The Mean ◽  
Positive Results

Rye (Secale cereale L.) is one of the most important cereals and is used in both the food and feed industries. It is produced mainly in a belt extending from Russia through Poland to Germany. Despite the great economic importance of this cereal, there is little research on rye contamination with mycotoxins. In this study, the occurrence of Fusarium mycotoxins (deoxynivalenol, nivalenol, 3-acetyl-deoxynivalenol, monoacetoxyscirpenol, diacetoxyscirpenol, T-2 toxin, HT-2 toxin, and zearalenone), as well as ochratoxin A, in 60 winter rye samples of four varieties (KWS Binntto, KWS Serafino, Dańkowskie Granat and Farm Saved Seed) cultivated in three consecutive growing seasons in five different regions of Poland was determined using liquid chromatography with tandem mass spectrometry and fluorescence detection. Deoxynivalenol, T-2 toxin, HT-2 toxin, and zearalenone had the highest occurrence in samples (90%, 63%, 57%, and 45% positive results, respectively). The mean concentrations of these analytes were 28.8 µg/kg (maximum 354.1 µg/kg), 0.98 µg/kg (maximum 6.63 µg/kg), 2.98 µg/kg (maximum 29.8 µg/kg), and 0.69 µg/kg (maximum 10.2 µg/kg), respectively. The mean concentrations for individual mycotoxins were highest in the 2016/2017 growing season. In the 2016/2017 growing season, at least two mycotoxins were detected in 95% of the samples, while in the 2018/2019 growing season, 70% of samples contained one or no mycotoxins. The frequencies of mycotoxin occurrence in different rye varieties were similar. Although a high frequency of mycotoxin occurrence was noted (especially deoxynivalenol), their concentrations were low, and none of the analyzed rye samples exceeded the maximum acceptable mycotoxin level set by the European Commission.

scholarly journals Early Field Performance of Micropropagated Japanese Persimmon Trees

HortScience ◽  
1998 ◽  
Vol 33 (4) ◽  
pp. 751-753 ◽  
Author(s):  
Takuya Tetsumura ◽  
Hisajiro Yukinaga ◽  
Ryutaro Tao
Keyword(s):  
Fine Roots ◽  
Field Performance ◽  
Growing Season ◽  
Dry Mass ◽  
Diospyros Kaki ◽  
Japanese Persimmon ◽  
Trunk Diameter ◽  
Growing Seasons ◽  
The Mean ◽  
Outdoor Nursery

Growth of micropropagated Japanese persimmon trees (Diospyros kaki L. cv. Nishimurawase) during the initial 3 years after field establishment was compared with that of grafted trees on seedling stocks. Judging from the mean length of annual shoots per tree and the yearly increases in height, trunk diameter, and top and root dry mass, the grafted trees on seedling stocks grew poorly during the first and second growing seasons, while micropropagated trees, raised in an outdoor nursery, developed poorly only during the first growing season. In contrast, micropropagated trees raised in pots fared well soon after field establishment. These trees had more fine than middle and large roots; in contrast, grafted trees on seedling stocks had one large taproot, which died back to some extent after field establishment, with few fine roots.

Effect of Soil Type and Site-Preparation Method on Growth and Yield of Flatwoods Slash Pine Plantations

1979 ◽  
Vol 3 (3) ◽  
pp. 95-100 ◽  
Author(s):  
Barry D. Shiver ◽  
James C. Fortson
Keyword(s):  
South Carolina ◽  
Soil Type ◽  
Preparation Method ◽  
Pinus Elliottii ◽  
Site Preparation ◽  
Slash Pine ◽  
Pine Plantations ◽  
Growth And Yield ◽  
Percent Survival ◽  
Lower Site

Abstract Analysis of measurements from slash pine (Pinus elliottii Engelm.) plantations in the flatwoods of Georgia, Florida, and South Carolina showed that plantations located on areas where debris had been moved (KG, bulldozed, rootraked, etc.) had significantly higher site indices than plantations located on comparable areas where debris had not been moved. Plantations located on spodic soils had significantly lower site indices than plantations located on nonspodic soils. While these differences were statistically significant, they were generally less than 2 feet at age 25. Neither volume nor percent survival was significantly affected by site-preparation classes or soils groups.

scholarly journals Thermal conditions in Bydgoszcz Region in growing seasons of 2011–2050 in view of expected climate change/ Warunki termiczne w rejonie Bydgoszczy w okresie wegetacyjnym w latach 2011–2050 w świetle przewidywanej zmiany klimatu

2014 ◽  
Vol 23 (1) ◽  
pp. 21-29 ◽  
Author(s):  
Bogdan Bąk ◽  
Leszek Łabędzki
Keyword(s):  
Air Temperature ◽  
Climate Model ◽  
Regional Climate ◽  
Thermal Conditions ◽  
Growing Season ◽  
Reference Period ◽  
Boundary Values ◽  
Growing Seasons ◽  
Change In The Mean ◽  
The Mean

Abstract The paper presents an analyse of the scenario of expected changes in monthly mean air temperature of months in the growing season (April-September) and growing seasons of 2011-2050 in Bydgoszcz Region. Prediction of thermal conditions is made using regional climate model RM5.1 with boundary values taken from global model ARPEGE. When compared with the reference period 1971-2000, an increase of mean air temperature should be expected in most months and growing seasons of the years 2011-2050. The biggest positive change in the mean monthly temperature is predicted for July (1.5°C) and August (1.2°C). In 2011-2050 significant increase trends of air temperature change can be expected in April, June and August. According to the thermal classification proposed by Lorenc, normal, slightly warm and slightly cool months and growing periods will dominate. The frequency of normal and slightly cool growing periods will decrease and the frequency of slightly warm growing periods will increase.

Influence of Bed Height on the Growth of Slash and Loblolly Pine on a Leon Fine Sand in Northeast Florida

1984 ◽  
Vol 8 (1) ◽  
pp. 29-31 ◽  
Author(s):  
Kenneth W. Outcalt
Keyword(s):  
Loblolly Pine ◽  
Species Difference ◽  
Fine Sand ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Growth And Yield ◽  
Clear Trend ◽  
Growing Seasons ◽  
Bed Height ◽  
Genetically Improved

Abstract Genetically improved slash (Pinus elliottii Engelm. var. elliottii) and loblolly pine (P. taeda L.) seedlings were planted on a Leon fine sand soil on a flatwoods site which received disking, low-bedding, or high-bedding treatment. After ten growing seasons there was no difference between slash pine growth on disked and low-bedded plots. High bedding improved slash pine growth over the other treatments. Loblolly pine responded more than slash to bed height with a clear trend of increasing growth and yield with higher beds. Wood production trends were as follows: (1) Slash pine produced the most wood volume on disked plots; (2) there was no species difference on low-bedded plots, and; (3) loblolly was better than slash pine on high-bedded plots.

scholarly journals Effect of mature spruce forest on canopy interception in subalpine conditions during three growing seasons

2021 ◽  
Vol 69 (4) ◽  
pp. 436-446
Author(s):  
Martin Jančo ◽  
Pavel Mezei ◽  
Andrej Kvas ◽  
Michal Danko ◽  
Patrik Sleziak ◽  
...  
Keyword(s):  
Growing Season ◽  
Canopy Gap ◽  
Synoptic Situation ◽  
Spruce Forest ◽  
Canopy Interception ◽  
Growing Seasons ◽  
The North ◽  
Precipitation Total ◽  
Normal Period ◽  
Spruce Stands

Abstract The interception process in subalpine Norway spruce stands plays an important role in the distribution of throughfall. The natural mountain spruce forest where our measurements of throughfall and gross precipitation were carried out, is located on the tree line at an elevation of 1,420 m a.s.l. in the Western Tatra Mountains (Slovakia, Central Europe). This paper presents an evaluation of the interception process in a natural mature spruce stand during the growing season from May to October in 2018–2020. We also analyzed the daily precipitation events within each growing season and assigned to them individual synoptic types. The amount and distribution of precipitation during the growing season plays an important role in the precipitation-interception process, which confirming the evaluation of individual synoptic situations. During the monitored growing seasons, precipitation was normal (2018), sub-normal (2019) and above-normal (2020) in comparison with long-term precipitation (1988–2017). We recorded the highest precipitation in the normal and above-normal precipitation years during the north-eastern cyclonic synoptic situation (NEc). During these two periods, interception showed the lowest values in the dripping zone at the crown periphery, while in the precipitation sub-normal period (2019), the lowest interception was reached by the canopy gap. In the central crown zone near the stem, interception reached the highest value in each growing season. In the evaluated vegetation periods, interception reached values in the range of 19.6–24.1% of gross precipitation total in the canopy gap, 8.3–22.2% in the dripping zone at the crown periphery and 45.7–51.6% in the central crown zone near the stem. These regimes are expected to change in the Western Tatra Mts., as they have been affected by windstorms and insect outbreaks in recent decades. Under disturbance regimes, changes in interception as well as vegetation, at least for some period of time, are unavoidable.

Response to Control of Competing Vegetation in Site-Prepared Slash Pine Plantations

1983 ◽  
Vol 7 (1) ◽  
pp. 38-45 ◽  
Author(s):  
Leon V. Pienaar ◽  
John W. Rheney ◽  
Barry D. Shiver
Keyword(s):  
Growth Response ◽  
Current Trend ◽  
Volume Growth ◽  
Average Diameter ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Diameter Growth ◽  
The Past ◽  
Growing Seasons ◽  
Over Time

Abstract In 9- to 15-year old site-prepared slash pine (Pinus elliottii Engelm.) plantations in the coastal flatwoods of Georgia and North Florida there was a significant growth response to complete elimination of competing understory vegetation over a four-year period. Average diameter growth increased 16 percent (0.06 in.) and 21 percent (0.15 in.) after two and four growing seasons, respectively. Volume growth increased by 7 percent (24 cu. ft./ac.) and 15 percent (100 cu. ft./ac.) after two and four years, respectively. If the current trend is sustained, the growth response will probably continue to increase over time as it has over the past four years. The response is most significant on soils which fall within the somewhat poorly to well-drained categories.

Establishment and Growth of Slash Pine on Grazed Cutover Range in Central Louisiana

1985 ◽  
Vol 9 (4) ◽  
pp. 232-236
Author(s):  
Harold E. Grelen ◽  
Henry A. Pearson ◽  
Ronald E. Thill
Keyword(s):  
Growing Season ◽  
Pinus Elliottii ◽  
Early Growth ◽  
Slash Pine ◽  
Heavy Grazing ◽  
Survival And Growth

Abstract Slash pine (Pinus elliottii) was established by both planting and seeding on cutover range units prescribe-burned and grazed yearlong. Paired fenced and unfenced plots were used to compare survival and growth on both heavily and lightly grazed range with ungrazed plots. On planted sites, survival was significantly lower on heavily grazed than on ungrazed sites by May of the first growing season. No significant differences in survival were found between lightly grazed and ungrazed sites. In seeded stands, survival was not significantly different between grazed and ungrazed sites. Trees were thinned at an average age of 18 years Prethinning measurements indicated that plantations subjected to heavy grazing throughout their existence had fewer trees per acre, but had larger dbh than the ungrazed. Consequently, differences in volume were not significant, showing regulated yearlong grazing to be compatible with the establishment and early growth of slash pine.

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