scholarly journals Root‐zone enrichment of C, N, and soil‐test biological activity under cotton systems in North Carolina

2021 ◽  
Author(s):  
Alan J. Franzluebbers
Keyword(s):  
North Carolina ◽  
Biological Activity ◽  
Root Zone ◽  
Soil Test

Identification of Lower Coastal Plain Sites of Low Soil Fertility

1980 ◽  
Vol 4 (2) ◽  
pp. 84-88 ◽  
Author(s):  
C. W. Ralston ◽  
D. D. Richter
Keyword(s):  
North Carolina ◽  
Soil Fertility ◽  
Coastal Plain ◽  
Large Scale ◽  
Soil Test ◽  
Aerial Photo ◽  
Aerial Photo Interpretation ◽  
Forest Survey ◽  
Lower Coastal Plain ◽  
Site Types

Abstract Analysis of forest survey plot data for 16 coastal counties in North Carolina indicated substantial areas of very low productivity for pine growth were associated with two site types, savannas and pocosins, that are easily identified by aerial photo interpretation. Results indicate that the ready identifiability of such areas provides a rapid method for screening areas for soil test sampling and for making large-scale economic appraisals of sites where fertilizer investments might be worthwhile.

Changes in chemical properties of 48 intensively grazed, rain-fed dairy paddocks on sandy soils over 11 years of liming in south-western Australia

Soil Research ◽  
2010 ◽  
Vol 48 (8) ◽  
pp. 682 ◽  
Author(s):  
M. D. A. Bolland ◽  
W. K. Russell
Keyword(s):  
Western Australia ◽  
Root Zone ◽  
Sandy Loam ◽  
Chemical Properties ◽  
Soil Testing ◽  
Soil Test ◽  
Organic Carbon Content ◽  
Pasture Production ◽  
Soil P ◽  
Soil Test P

Soil testing was conducted during 1999–2009 to determine lime and fertiliser phosphorus (P), potassium (K), and sulfur (S) requirements of intensively grazed, rain-fed, ryegrass dairy pastures in 48 paddocks on sand to sandy loam soils in the Mediterranean-type climate of south-western Australia. The study demonstrated that tissue testing was required in conjunction with soil testing to confirm decisions based on soil testing, and to assess management decisions for elements not covered by soil testing. Soil testing for pH was reliable for indicating paddocks requiring lime to ameliorate soil acidity, and to monitor progress of liming. Soil P testing proved reliable for indicating when P fertiliser applications were required, with no P being required when soil-test P was above the critical value for that soil, and when no P was applied, tissue testing indicated that P remained adequate for ryegrass production. Soil testing could not be used to determine paddocks requiring fertiliser K and S, because both elements can leach below the root-zone, with rainfall determining the extent of leaching and magnitude of the decrease in pasture production resulting from deficiency, which cannot be predicted. The solution is to apply fertiliser K and S each year, and use tissue testing to improve fertiliser K and S management. Research has shown that, for dairy and other grazing industries in the region, laboratories need measure and report every year soil pH and soil-test P only, together with measuring every 3–5 years the P-buffering index (estimating P sorption of soil), organic carbon content, and electrical conductivity.

scholarly journals Estimating the efficiency level of different tea farming systems in Rize Province Turkey

2019 ◽  
Vol 49 (12) ◽  
Author(s):  
Shamsheer ul Haq ◽  
Ismet Boz
Keyword(s):  
Root Zone ◽  
Farming Systems ◽  
Fertilizer Application ◽  
Farm Management ◽  
Soil Test ◽  
Data Envelopment ◽  
Related Factors ◽  
Yield Level ◽  
Stratified Sample ◽  
Negative Effect

ABSTRACT: The primary purpose of this study was to analyze the efficiency level of tea farms operated by owners and shareholders, and to explore the effect of different decisional, structural and management factors on efficiency. The data were collected from a stratified sample of 138 tea farmers operated in Rize province Turkey in 2017. The data envelopment analysis (DEA) program was used to estimate the efficiency scores. Tobit model was used to explore determinants of technical efficiency. Results disclosed that farmers can reduce their inputs use by 43% without compromising their yield level. However, they have low economic efficiency (0.41). Shareholder-operated farms were highly efficient (0.76) than the owner-operated farms. The factors such as old tea parcels, high land slope, and altitude were having a significant negative effect on farms’ efficiency. Applying fertilizer in the root zone or mixed with soil, terracing of farmland, and performing of soil test was positively and significantly contributing to efficiency. Generally, the efficiency of tea farmers is low, and mostly farm management and structure related factors were negatively affecting the farmer’s efficiency. The farmers should be aware of associated benefits with early replanting tea, fertilizer application in the root zone and terracing to control their production cost.

Flight Patterns and White Grub Population Densities of Three Beetle Species (Coleoptera: Scarabaeidae) in the Mountains of Northwestern North Carolina

1990 ◽  
Vol 25 (1) ◽  
pp. 34-43 ◽  
Author(s):  
Bradford M. R. Kard ◽  
Fred P. Hain
Keyword(s):  
North Carolina ◽  
Root Zone ◽  
Light Trap ◽  
White Grub ◽  
Population Densities ◽  
White Grubs ◽  
Sampling Studies ◽  
Large Numbers ◽  
Males And Females ◽  
Phyllophaga Anxia

Light-trap and soil-sampling studies were conducted at higher elevations in the Appalachian Mountains of northwestern North Carolina to determine adult flight patterns and white grub population densities and instar ratios of three scarab species: Phyllophaga anxia (LeConte) Glasgow, P. fusca (Froelich) Glasgow, and Polyphylla comes Casey. Flights of the two Phyllophaga species overlapped (May–June), preceding Polyphlla flights (July–August). Multiple flights of Phyllophaga anxia and P. fusca occurred over periods of 10 and 12 weeks, respectively. Multiple flights of Polyphylla comes lasted for 6 weeks. For all three species, peak flight densities occurred 3 to 4 weeks after initial flights. Phyllophaga males and females were captured in large numbers, but very few female Polyphylla were caught. Most Phyllophaga were caught before midnight, most Polyphylla between midnight and 0400 h. White grubs were found in the root zone from early May to late September. The mean (±SEM) and maximum grub densities observed were 14.6 ± 1.7 and 34.0 grubs per m2, respectively.

Soil-Test Biological Activity with the Flush of CO2: I. C and N Characteristics of Soils in Corn Production

2018 ◽  
Vol 82 (3) ◽  
pp. 685-695 ◽  
Author(s):  
Alan J. Franzluebbers ◽  
Mary R. Pershing ◽  
Carl Crozier ◽  
Deanna Osmond ◽  
Michelle Schroeder-Moreno
Keyword(s):  
Biological Activity ◽  
Soil Test ◽  
Corn Production ◽  
C And N
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