Relationship of understory diversity to soil nitrogen, topographic variation, and stand age in an eastern oak forest, USA

Initial nitrate-nitrogen content of the soil gave a correlation coefficient (r) of 0.93 with yields and with total nitrogen uptake of Brussels sprouts plants (Brassica oleracea var. gemmifera DC., Jade Cross). Soil nitrogen extracted with 0.01 M NaHCO3 gave r values of 0.76 with yields and 0.75 with nitrogen uptake. Nitrate incubation results from leached, moist soil samples gave r values of 0.59 with yields and 0.56 with nitrogen uptake. However, air-drying of soil samples prior to leaching and incubation resulted in r values of only 0.15 and 0.11 with yields and nitrogen uptake, respectively. Available nitrogen determined by incubation without previous leaching of the soil samples gave high r values because of the influence of the initial nitrate nitrogen in the soil.

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240 RELATIONSHIP OF GROWING LOCATIONS, HARVEST MATURITY, SUMMER PRUNING, SOIL NITROGEN APPLICATION, AND STORAGE ON FRUIT POSTHARVEST PERFORMANCE IN `HAYWARD' KIWIFRUIT

HortScience ◽

10.21273/hortsci.29.5.464a ◽

1994 ◽

Vol 29 (5) ◽

pp. 464a-464

Author(s):

Sanliang Gu ◽

Carlos H. Crisosto ◽

R. Scott Johnson ◽

Robert C. Cochran ◽

David Garner

Keyword(s):

Soil Nitrogen ◽

Soluble Solids ◽

Soluble Solids Content ◽

Nitrogen Application ◽

Central California ◽

Flesh Firmness ◽

Solids Content ◽

Free Environment ◽

Harvest Maturity ◽

Relationship Of

Fruit from 8 `Hayward' kiwifruit vineyards in central California were harvested at 2 week intervals after soluble solids content (SSC) reached 6% and subjected to 4 and 6 months of storage at 0°C in an ethylene free environment. Fruit characteristics at harvest and postharvest performance varied considerably among locations. Fruit stored for 6 months had the same fresh weight, less flesh firmness and higher SSC, than the 4 months storage. Later harvested fruit had greater fruit flesh firmness and higher SSC after storage. SSC after storage was predictable based on ripe soluble solids content (RSSC) at harvest. Summer pruning reduced while soil nitrogen application increased fruit SSC.

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Soil Available Phosphorus Loss Caused by Periodical Understory Management Reduce Understory Plant Diversity in a Northern Subtropical Pinus massoniana Plantation Chronosequence

Forests ◽

10.3390/f11020231 ◽

2020 ◽

Vol 11 (2) ◽

pp. 231

Author(s):

Dong Dai ◽

Ashfaq Ali ◽

Xin Huang ◽

Mingjun Teng ◽

Changguang Wu ◽

...

Keyword(s):

Soil Properties ◽

Plant Diversity ◽

Soil Layer ◽

Pinus Massoniana ◽

Stand Age ◽

Available Phosphorus ◽

Soil Available Phosphorus ◽

Understory Plants ◽

Understory Diversity ◽

Understory Plant

Clearing of understory plants is a common management method in plantation forests, but its long-term impact on soil properties and understory plant diversity is still poorly understood. In order to uncover the potential relationship between understory diversity and soil properties, we categorized understory plants into herbs and shrubs, and took soil depth into consideration. We measured the soil variables and investigated the understory plant diversity in four stand age-classes (9-year-old for young, 18-year-old for intermediate, 28-year-old for near-mature, and 48-year-old for mature) in a Pinus massoniana plantation. We aimed to examine how the diversity of herbs and shrubs changed with stand succession and to determine which of the three soil depths (0–10 cm, 10–20 cm, 20–40 cm) had the strongest explanation for the understory plant diversity. Furthermore, structural equation modeling (SEM) was performed to assess the direct and indirect effect of understory clearing and stand age on understory diversity. We found that understory clearing influenced the trend of diversity of herbs and shrubs with stand age, and understory diversity showed a strong correlation with soil physical properties in all three soil layers. The soil properties in the 10–20 cm soil layer related with the diversity of herbs and shrubs most, while the 20–40 cm soil layer properties related with them the least. Understory clearing reduced soil available phosphorus (AP). Understory clearing and stand age were found to benefit understory plant diversity directly and decreased the understory diversity indirectly via AP. Consequently, to improve our understanding of the impact of understory clearing and stand age on biodiversity, we should take into account its direct and indirect effects.

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Soil and plant water stress in an Appalachian oak forest in relation to topography and stand age

Plant and Soil ◽

10.1007/bf02161173 ◽

1984 ◽

Vol 80 (2) ◽

pp. 171-179 ◽

Cited By ~ 14

Author(s):

Tina M. Meiners ◽

David Wm. Smith ◽

Terry L. Sharik ◽

Donald E. Beck

Keyword(s):

Water Stress ◽

Stand Age ◽

Oak Forest ◽

Plant Water ◽

Plant Water Stress

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ANALISIS BIOMASA DAN CADANGAN KARBON PADA BERBAGAI UMUR TEGAKAN DAMAR (Agathis dammara (Lamb.) Rich.) DI KPH BANYUMAS TIMUR

Scripta Biologica ◽

10.20884/1.sb.2017.4.2.404 ◽

2017 ◽

Vol 4 (2) ◽

pp. 119 ◽

Cited By ~ 1

Author(s):

Zinatul Uthbah ◽

Eming Sudiana ◽

Edy Yani

Keyword(s):

Carbon Sink ◽

Global Climate ◽

Age Groups ◽

Sampling Technique ◽

Carbon Stocks ◽

Stand Age ◽

Test Results ◽

Relationship Of ◽

The Relationship ◽

Cluster Random Sampling

Increased carbon dioxide in the atmosphere causes global climate change seriously. Forests serve as an important asset that can absorb and store carbon in the form of biomass. One type of potential forest as a carbon sink is forests resin. The amount of carbon stored by standing very dynamic and varies according to the age of its standing. Therefore, studies will be needed to determine the effect of age on biomass and carbon stocks stands resin, determine the relationship between age and standing biomass and carbon stocks resin, and knowing the optimum resin stand age in storing biomass and carbon stocks. This research was conducted at the stands of resin RPH Karang Gandul, KPH Banyumas Timur for four weeks in May 2016. The method used is a survey with a sampling technique using cluster random sampling. Stands resin used in the study were classified into five age groups with 5 replicates. Data were analyzed using ANOVA with an error rate of 5% and continued with LSD for further test results were significant and regression analysis to determine the relationship of age with biomass and carbon stocks stands resin. The results showed that the age effect on biomass and carbon stocks stands resin, the relationship formed between the age of stand with biomass and carbon stocks are quadratic, and age optimum in storing biomass and carbon stocks is 35 years.

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Abundance of Apodemus spp. varies by stand age in coppice-originated oak forest, Thrace, Turkey

Bosque (Valdivia) ◽

10.4067/s0717-92002016000200021 ◽

2016 ◽

Vol 37 (2) ◽

pp. 425-429 ◽

Cited By ~ 1

Author(s):

Akif Keten ◽

Vedat Beskardes ◽

Ender Makineci ◽

Meriç Kumbasli ◽

James T Anderson

Keyword(s):

Stand Age ◽

Oak Forest

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Relationship of under-story vegetation diversity with stand age and soil factor of eucalypt plantations in central-western Guangdong

Acta Ecologica Sinica ◽

10.5846/stxb201301060041 ◽

2014 ◽

Vol 34 (17) ◽

Author(s):

李伟 LI Wei ◽

张翠萍 ZHANG Cuiping ◽

魏润鹏 WEI Run-Peng

Keyword(s):

Stand Age ◽

Vegetation Diversity ◽

Soil Factor ◽

Eucalypt Plantations ◽

Relationship Of

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Relationships of channel characteristics, land ownership, and land use patterns to large woody debris in western Oregon streams

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f02-052 ◽

2002 ◽

Vol 59 (5) ◽

pp. 796-807 ◽

Cited By ~ 22

Author(s):

Michael G Wing ◽

Arne Skaugset

Keyword(s):

Land Use ◽

Woody Debris ◽

Aquatic Habitat ◽

Channel Width ◽

Large Woody Debris ◽

Stand Age ◽

Land Uses ◽

Land Use Patterns ◽

Use Patterns ◽

Relationship Of

Regression tree analysis was used to test the relationship of channel and aquatic habitat characteristics from 3793 stream reaches in western Oregon State to the abundance of large woody debris (LWD). Stream reaches were drawn from diverse ownerships and land uses land cover types over a broad geographic extent. When all land uses land covers were considered, ownership and land use patterns were related to LWD abundance. When nonforested land uses were excluded, however, these factors became less important. In forested streams, LWD abundance was predicted primarily by stream gradient and bankfull channel width, with the volume, frequency, and size of LWD pieces decreasing as channel size increased. Within forested lands, stand age and forest distribution were related to LWD size but had small correlations with LWD volume and abundance. The strong relationship of stream gradient and bankfull channel width with LWD suggests that in forested areas, the most significant factor related to LWD counts is the geomorphology of stream reaches and their surrounding areas. Land managers in western Oregon who want to improve aquatic habitat quality may want to direct their efforts to increasing LWD in larger streams, which typically include smaller quantities of LWD.

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How Many Tree Heights Should You Measure for Natural, Atlantic Coastal Plain Loblolly Site Index?

Southern Journal of Applied Forestry ◽

10.1093/sjaf/5.4.180 ◽

1981 ◽

Vol 5 (4) ◽

pp. 180-183 ◽

Cited By ~ 1

Author(s):

F. Thomas Lloyd

Keyword(s):

Sample Size ◽

Loblolly Pine ◽

Coastal Plain ◽

Site Index ◽

Atlantic Coastal Plain ◽

Stand Age ◽

Site Class ◽

Pinus Taeda L ◽

Relationship Of ◽

Atlantic Coastal

Abstract Sample size is tabulated for the number of tree heights needed to site-classify plots growing natural, Atlantic coastal plain loblolly pine (Pinus taeda L.). The size of the sample depends on observed stand age and selected site-class size, index age, and classification success rate. The most important outcome is the relationship of sample size to stand age because putting it into practice results in uniformly reliable site-index estimates.

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