scholarly journals KARAKTERISTIK DAN KERAGAMAN TANAH KETAPING SELATAN KECAMATAN BATANG ANAI KABUPATEN PADANG PARIAMAN

Jurnal Solum ◽  
2010 ◽  
Vol 7 (2) ◽  
pp. 131
Author(s):  
Adrinal Adrinal ◽  
Neldi Armon
Keyword(s):  
Carrying Capacity ◽  
Soil Characteristics ◽  
Low Fertility ◽  
Soil Productivity ◽  
Proper Management ◽  
Soil Variation

A study of soil characteristics and soil variation was carried out in Ketaping Selatan, Batang Anai, Padang Pariaman District. The study aimed to identify the characteristics and variation of soil of Ketaping Selatan as a selected village under University of Andalas supervisory. The results indicated that Ketaping Selatan has two soil variations namely Typic Udifluvents and Terric haplosaprists. Both soils are categorized as soils with low fertility and low carrying capacity. It is needed a proper management for enhanching their soil productivity, erspecially for agricultural purposes. Keyword : soil caracteristics, soil variation

PASTURE ESTABLISHMENT ON EAST COAST NORTH ISLAND HILL COUNTRY

1984 ◽  
pp. 216-218
Author(s):  
B.J. Arnst ◽  
O.L. Park
Keyword(s):  
White Clover ◽  
Carrying Capacity ◽  
Return On Investment ◽  
East Coast ◽  
Close Association ◽  
Development Programme ◽  
Low Fertility ◽  
Stock Management ◽  
Hill Country

Large areas of North Island hill country are producing below potential as a result of low fertility and poor pasture composition. Removal of undesirable species and replacement with a higher producing pasture is essential for increased productivity but is difficult to achieve. A development programme is described where the use of glyphosate in close association with oversowing and stock management has allowed rapid pasture establishment, marked increase in carrying capacity and a quick return on investment. Keywords: Pasture establishment, glyphosate, oversowing, white clover, subdivision, productivity.

scholarly journals Integration of Soil Electrical Conductivity and Indices Obtained through Satellite Imagery for Differential Management of Pasture Fertilization

2019 ◽  
Vol 1 (4) ◽  
pp. 567-585 ◽  
Author(s):  
João Serrano ◽  
Shakib Shahidian ◽  
José Marques da Silva ◽  
Luís Paixão ◽  
José Calado ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Spatial Variability ◽  
Satellite Imagery ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Temporal Stability ◽  
Soil Characteristics ◽  
Low Fertility ◽  
Soil Electrical Conductivity ◽  
Potential Productivity

Dryland pastures in the Alentejo region, located in the south of Portugal, normally occupy soils that have low fertility but, simultaneously, important spatial variability. Rational application of fertilizers requires knowledge of spatial variability of soil characteristics and crop response, which reinforces the interest of technologies that facilitates the identification of homogeneous management zones (HMZ). In this work, a pasture field of about 25 ha, integrated in the Montado mixed ecosystem (agro-silvo-pastoral), was monitored. Surveys of apparent soil electrical conductivity (ECa) were carried out in November 2017 and October 2018 with a Veris 2000 XA contact sensor. A total of 24 sampling points (30 × 30 m) were established in tree-free zones to allow readings of normalized difference vegetation index (NDVI) and normalized difference water index (NDWI). Historical time series of these indices were obtained from satellite imagery (Sentinel-2) in winter and spring 2017 and 2018. Three zones with different potential productivity were defined based on the results obtained in terms of spatial variability and temporal stability of the measured parameters. These are the basis for the elaboration of differentiated prescription maps of fertilizers with variable application rate technology, taking into account the variability of soil characteristics and pasture development, contributing to the sustainability of this ecosystem.

scholarly journals Maintaining Soil Productivity during Forest or Biomass-to-Energy Thinning Harvests in the Western United States

2010 ◽  
Vol 25 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Deborah S. Page-Dumroese ◽  
Martin Jurgensen ◽  
Thomas Terry
Keyword(s):  
United States ◽  
Energy Production ◽  
Management Practices ◽  
Forest Health ◽  
Biological Properties ◽  
Low Fertility ◽  
Western United States ◽  
Soil Productivity ◽  
Rating Systems ◽  
Partial Cutting

Abstract Forest biomass thinnings, to promote forest health or for energy production, can potentially impact the soil resource by altering soil physical, chemical, and/or biological properties. The extent and degree of impacts within a harvest unit or across a watershed will subsequently determine if site or soil productivity is affected. Although the impacts of stand removal on soil properties in the western United States have been documented, much less is known on periodic removals of biomass by thinnings or other partial cutting practices. However, basic recommendations and findings derived from stand-removal studies are also applicable to guide biomass thinnings for forest health, fuel reduction, or energy production. These are summarized as follows: (1) thinning operations are less likely to cause significant soil compaction than a stand-removal harvest, (2) risk-rating systems that evaluate soil susceptibility to compaction or nutrient losses from organic or mineral topsoil removal can help guide management practices, (3) using designated or existing harvesting traffic lanes and leaving some thinning residue in high traffic areas can reduce soil compactionon a stand basis, and (4) coarse-textured low fertility soils have greater risk of nutrient limitations resulting from whole-tree thinning removals than finer textured soils with higher fertility levels.

scholarly journals NUTRIENT RETURN THROUGH LITTERFALL IN A Eucalyptus dunnii Maiden STAND IN SANDY SOIL

2016 ◽  
Vol 40 (6) ◽  
pp. 1041-1048 ◽  
Author(s):  
Aline Aparecida Ludvichak ◽  
Mauro Valdir Schumacher ◽  
Grasiele Dick ◽  
Dione Richer Momolli ◽  
Huan Pablo de Souza ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Sandy Soil ◽  
Soil Characteristics ◽  
Forest Stand ◽  
Low Fertility ◽  
Nutrient Return ◽  
Pampa Biome ◽  
Eucalyptus Dunnii ◽  
Transfer Order ◽  
Subsequent Chemical

ABSTRACT In a forest stand, litterfall is primarily responsible for the retention and return of nutrients to the soil. The objective of this study was to evaluate the return of nutrients through litterfall in a stand of Eucalyptus dunnii in a Pampa biome. For quantification of litterfall, four 420-m2 installments were marked; within each one, four 0.50-m2 collection plots were distributed. For the collection of thick branches, four 7.00-m2 sub-plots were staked out. The collected litterfall was separated into leaf, twig, thick branch, and miscellany fractions for subsequent chemical analysis. The total litterfall measured was 6.99 Mg ha-1 yr-1, and comprised 61.57% leaves, 17.34% twigs, 13.83% thick branches, and 7.26% miscellany. The total amount of macronutrients in the litterfall was 160.22 kg ha-1 yr-1, and the macronutrient transfer order was the same for the leaf, twig, and thick branch fractions (Ca > N > K > Mg > S > P). The total quantity of micronutrients was 7.55 kg ha-1 yr-1, and the transfer order was Mn > Fe > B > Zn > Cu. Maintaining litterfall on the site, especially in degraded or low fertility soils like in the Pampa biome, may contribute to possible improvements in soil characteristics.

scholarly journals A study of soil variation in podzols in the Netherlands.

1986 ◽  
Vol 34 (1) ◽  
pp. 106-108
Author(s):  
M.J.M. Hootsmans ◽  
M.F. Wallis de Vries
Keyword(s):  
The Netherlands ◽  
Water Table ◽  
Random Sampling ◽  
Sampling Method ◽  
Soil Characteristics ◽  
Fine Grained ◽  
Sampling Distance ◽  
Soil Variation

Variation in 31 soil characteristics was studied in a 100-ha area with a nested random sampling method and a 400-m transect. Apart from water-table, no characteristics or combinations thereof could be mapped accurately with a sampling distance of 50 cm. Wet and dry podzols were distinguished, distributed in a fine-grained pattern of small units (less than 4 msuperscript 2). (Abstract retrieved from CAB Abstracts by CABI’s permission)

Are floristic and edaphic patterns in Amazonian rain forests congruent for trees, pteridophytes and Melastomataceae?

2007 ◽  
Vol 23 (1) ◽  
pp. 13-25 ◽  
Author(s):  
Kalle Ruokolainen ◽  
Hanna Tuomisto ◽  
Manuel J. Macía ◽  
Mark A. Higgins ◽  
Markku Yli-Halla
Keyword(s):  
Species Abundance ◽  
Soil Characteristics ◽  
Rain Forests ◽  
Soil Variables ◽  
Plant Groups ◽  
Soil Variation ◽  
Floristic Patterns ◽  
Geographical Distances ◽  
Highly Correlated ◽  
Mantel Correlations

Studies in western Amazonian forests have found that similarities in soil cation concentration and texture explain floristic similarities between sites, when these are measured using trees, pteridophytes or Melastomataceae. However, it is not known to what extent the three plant groups react to the same soil characteristics, because tree studies have almost always been conducted in different areas than studies on the understorey plant groups. We made inventories in 23 sites representing non-inundated rain forests on clayey to loamy soil in three regions of western Amazonia. Significant Mantel correlations between the floristic patterns of trees and pteridophytes were found in all three regions when floristic differences were measured with species presence–absence data. When species abundance data were used, and when the floristic patterns of trees and Melastomataceae were compared, significant correlations were found in one or two regions. Mantel correlations between plant groups were highest in the two regions where the observed variation in soil characteristics was largest. In all regions, the same soil variables emerged with significant Mantel correlations with trees, pteridophytes and Melastomataceae. Soil calcium and magnesium were most frequently retained in the models of multiple regression on distance matrices. On average, soil differences explained 50% of the variation in floristic differences (range = 14–84%), and geographical distances explained 16% (range = 0–64%). Our results demonstrate that beta diversities of the three plant groups are highly correlated, and that much of this congruence is explained by similar reactions to soil variation. These results support the idea that pteridophytes, and to a lesser degree Melastomataceae, can be used as indicators of general floristic and edaphic patterns in Amazonian rain forests. Since understorey plants are much quicker to inventory than trees, this would make it possible to recognize and map floristic patterns over huge areas of lowland Amazonia within a reasonable time.

scholarly journals Mycorrhizal Inoculation Improves Mineral Content of Organic Potatoes Grown under Calcareous Soil

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 333
Author(s):  
Sara Lombardo ◽  
Aurelio Scavo ◽  
Cristina Abbate ◽  
Gaetano Pandino ◽  
Bruno Parisi ◽  
...  
Keyword(s):  
Mineral Content ◽  
Soil Characteristics ◽  
Mineral Elements ◽  
Low Fertility ◽  
Early Potato ◽  
Potato Tubers ◽  
Mycorrhizal Inoculation ◽  
Organically Grown ◽  
The Impact ◽  
Soil Level

Soil mycorrhization can play an important role for the qualitative improvement of organically grown “early” potato tubers especially in low fertility soils (such as calcareous ones), by ameliorating plant uptake of limiting mineral nutrients in the soil. Hence, the objective of the present research was to elucidate the impact of soil mycorrhization on the tuber minerals content of three potato cultivars organically grown in two locations with different soil characteristics. Our data revealed the keyrole of soil mycorrhization on the tuber accumulation of Na, Cu, Mn, and P and on reducing the Na/K ratio, although the effects of soil mycorrhization were cultivar- and location-dependent. Accordingly, soil mycorrhization was able to enhance the levels of K and Ca in ‘Arizona’ and that of Mn in ‘Universa’, while it increased the Zn amount in all the cultivars under study. Additionally, soil mycorrhization significantly improved the levels of Cu and Mn in tubers in the location characterized by an initial higher soil level of these micro-minerals. This work highlighted the possibility to fortify organic early potato tubers, in terms of macro- and micro-mineral elements, by applying an eco-sustainable tool such as soil mycorrhization, provided that specific consideration is given to cultivar choice and soil characteristics.

Low Fertility in Europe: Is There Still Reason to Worry?

2011 ◽  
Author(s):  
Stijn Hoorens ◽  
Jack Clift ◽  
Laura Staetsky ◽  
Barbara Janta ◽  
Stephanie Diepeveen ◽  
...  
Keyword(s):  
Low Fertility

Analisis Daya Dukung Tanah Dan Bahan Pondasi Tiang Pancang Pada Pembangunan Jembatan Kab. Jombang

2020 ◽  
Vol 9 (1) ◽  
pp. 32-37
Author(s):  
Ruslan Hidayat ◽  
Saiful Arfaah
Keyword(s):  
Carrying Capacity ◽  
Pile Foundation ◽  
Heavy Traffic ◽  
Traffic Volume ◽  
Material Strength ◽  
Cone Penetrometer ◽  
The Village

One of the most important factors in the structure of the pile foundation in the construction of the bridge is the carrying capacity of the soil so as not to collapse. Construction of a bridge in the village of Klitik in Jombang Regency to be built due to heavy traffic volume. The foundation plan to be used is a pile foundation with a diameter of 50 cm, the problem is what is the value of carrying capacity of soil and material. The equipment used is the Dutch Cone Penetrometer with a capacity of 2.50 tons with an Adhesion Jacket Cone. The detailed specifications of this sondir are as follows: Area conus 10 cm², piston area 10 cm², coat area 100 cm², as for the results obtained The carrying capacity of the soil is 60.00 tons for a diameter of 30 cm, 81,667 tons for a diameter of 35 cm, 106,667 tons for a diameter of 40 cm, 150,000 tons for a diameter of 50 cm for material strength of 54,00 tons for a diameter of 30 cm, 73,500 tons for a diameter of 35 cm, 96,00 tons for a diameter of 40 cm, 166,666 tons for a diameter of 50 cm

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