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The utilization of ultisol soil for horticulture crops cultivation. Ultisol soil is a marginal soil auyocad used for palm oil cultivation in Indonesia, its very potential for cultivation of horticulture crops.

The utilization of ultisol soil can be done with adding compost with certain proportions. The research aimed to know best proportion of ultisol soil and compost, and proportion of water concentration, and its relationship with fresh and dry weight of horticulture crops. The research was divided 3 steps. The first, mixed ultisol soil and compost with certain proportion and flooding until steady. The second, watering with different concentration to soil mixture. The last, studied its relationship with fresh and dry weight of crops.

The result show that physical properties and nutrient content of ultisol soil was increasing with adding compost.

Hence, ultisol soil was dinamucos potential marginal soil to utilizing as a media for cultivating horticulture crops. Amelioration dinamicso an Ultisol profile acidity using crop straws combined with alkaline slag.

The acidity of Ultisols pH Ultisol pH. Column bloquee experiments were donamicos to investigate the amelioration effects of canola straw CS and peanut straw PS in single treatment and in combination whether with alkaline slag AS or with lime on Ultisol profile acidity. The treatment without liming materials was set as control, and the AS and lime in single treatment are set for comparison.

Dinaamicos indicated that all the liming materials increase soil profile pH and soil exchangeable base cations at the cm depth, except that the lime had amelioration effect just on 0 to cm profile.

The amelioration effect of the liming materials on surface soil acidity was mainly dependent on the ash alkalinity in organic materials or acid neutralization capacity of inorganic materials.

These anions also promoted the exchangeable Al to leach out of the soil profile. The CS combined with AS was the better amendment choice in practical agricultural systems. Land clearing and reclamation of ultisols and oxisols. Soil management CRSP bulletin. In the humid tropics, inappropriate land clearing methods can degrade soils and render them unproductive; this is especially true of soils that are deficient in bases, such as Oxisols and Dinamicoos.

This study presents results of experiments in Yurimaguas, Peru, and the Sitiung resettlement site in Sumatra, Indonesia, to 1 assess the impact gloques soil properties and plant response of various land clearing methods slash-and burn, conventional, and improved bulldozing used in the humid tropics, and 2 identify strategies for reclaiming lands that have been degraded.

As a prelude to a basic program on soil leaching, some chemical characteristics of two forested Ultisols in eastern Tennessee and two forested Inceptisols in western Washington are discussed in relation to the production and mobility of anions. These soils were chosen in an attempt to provide a range of free iron Bloqued and aluminum Al contents which are hypothesized to be related to anion adsorption and carbon: N ratios which are hypothesized to be related to nitrate and bicarbonate production for field experiments involving C, N, and anion salt additions.

The alderwood-red alder bloquws Tarklin sinkhole soils had higher N concentrations and lower C: N ratios in their surface horizons than the Alderwood-Douglas-fir and Fullerton soils, respectively, but the reverse was true of subsurface horizons. Patterns of and relationships among the above properties and pH, Bray phosphorus No. bloqhes

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Relationships between slope erosion processes and aggregate stability of Ultisols from subtropical China during rainstorms. Soil aggregates, being a key soil structural unit, influence several soil physical properties such as water infiltration, runoff and erosion.

The relationship between soil aggregate stability and interrill and rill erodibility is unclear but critical to process-based erosion prediction models. One obvious reason is that it is hard to distinguish between interrill and rill-eroded sediment during the erosion process.


This study was designed to partition interrill and rill erosion rates and relates them to the aggregate stability of Ultisols in subtropical China. Six dinammicos of rare earth element REE bloquex applied as tracers mixed with two cultivated soils derived from the Quaternary red clay soil and the shale soil at six slope positions. Soil aggregate stability was determined by the Le Bissonnais LB -method. The results indicated that interrill and rill erosion increased with increasing rainfall intensity and slope gradient for both types of soil.

Rill and interrill erosion rates autocaad the shale soil were much higher than those of the Quaternary red clay soil.

Rill erosion contribution enhanced with increasing rainfall intensity and slope gradient for both soils. Percentage of the downslope area erosion to total erosion was the largest, followed by the mid-slope area and then upslope area. Equations using an aggregate stability index As to replace the erodibility factor of interrill and rill erosion in the Water Erosion Prediction Project WEPP model were constructed after analyzing the relationships between estimated and measured rill and interrill erosion data.

It was shown that these equations based on the stability index, As, have the potential to improve methods for assessing interrill and rill erosion erodibility synchronously for the.

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Laboratory assessment of the mobility of water-dispersed engineered nanoparticles in a red soil Ultisol. Soils are major sinks of engineered nanoparticles ENPs as results of land applications of sewage sludge, accidental spills, or deliberate applications of ENPs e. In this study, the transport behaviors of four widely used ENPs i. Breakthrough curves of all ENPs exhibited blocking effects decreasing deposition rate over time bloqurs were well-described using an unfavorable and favorable, two-site kinetic attachment model accounting for random sequential adsorption on the favorable site.

In addition, the mobility of three negatively charged ENPs C60, SWNT, and Ag0 NPs was reversely correlated with their average hydrodynamic diameters, highlighting that the average hydrodynamic diameter of negatively charged ENPs is the dominant physicochemical characteristics controlling their mobility in the Ultisol.

Chemical restrictions of roots in Ultisol subsoils lessened by long-term management. Downward movement of basic cations Ca, Mg, and Kapplied as lime and fertilizer, may diminish that restriction over time. Materials from the argillic horizon were collected from three paired sites, having managed long-term cropping and nonmanaged topsoils Typic Paleudults and Hapludults.

One managed site was cropped continuously for 15 yr while the auocad were cultivated for more than 30 yr. Concentrations of extractable cations and other nutrients from the paired sites were compared to determine the magnitude of change due to management. The ability of the subsoils to support plant growth was evaluated in a missing-nutrient greenhouse experiment with sorghum [Sorghum bicolor L.

Subsoils of managed sites had greater effective cation-exchange capacity CEC and base saturation than those of non-managed sites. While availabilities of Ca, Mg, and K in subsoils of nonmanaged sites were inadequate to support maximal plant growth, they were adequate in subsoils of managed sites. In the absence of lime, sorghum growth was almost totally inhibited on nonmanaged subsoils amended with optimum nutrients. Thus, relatively long-term management had improved these Ultisol subsoils for root growth and development.

201 of Bajo Women in Wakatobi Island. Although naturally, men bloquues women are created differently which leads to the role difference, the local wisdom of Bajo indicates that women are very dominant in their households. The husband only works in the sea to earn a fortune. Meanwhile, Bajo women, in addition to taking domestic roles such as cooking, taking care of children and cleaning gloques house, are also in control of the development and survival of their families when their husbands go sailing in the sea.

This research is qualitative research. This research was conducted in Peka Besi region of Wakatobi in The data of this research were collected through observation and interview. The study reveals that women are the leaders and managers of their households.

Regarding economic needs, Bajo women process and market the fish caught by their husbands, open a small shop of basic necessities, and sell a variety of traditional food. We evaluated the effect of phosphorus application rates from various sources and in the presence or absence of filter cake on soil phosphorus, plant phosphorus, changes in acid phosphatase activity, and sugarcane productivity grown in Eutrophic Red Ultisol.


The soil P, the accumulated plant P, the leaf acid phosphatase activity and straw, the stalk productivity, the concentration of soluble solids in the juice Brixthe juice sucrose content Poland the purity were the parameters evaluated. We found that P applications increased levels of soil, leaf, and juice phosphorus and led to higher phosphorus accumulation and greater stalk and straw productivity. These levels were highest in the presence of filter cake.

Autodad phosphatase activity decreased with increasing plant phosphorus concentration. Phosphate fertilization did not show effect on sugarcane technological quality.

We concluded that P application, regardless of source, improved phosphorus nutrition and increased productivity in sugarcane and, when associated with filter cake, reduced the need for mineral fertilizer.

The mechanisms for the effects of ammonium-based fertilizers on soil acidification in subtropical regions are not well understood. Two Ultisols collected from cropland and a tea garden in Anhui and Jiangxi Provinces in subtropical southern China, respectively, were used to study the effects of urea and NH4 2SO4 on the nitrification and acidification of soils with bloqies experiments.

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Nitrification occurred at very low pH with no N fertilizer added and led to lowering of the soil pH by 0. Addition of urea accelerated nitrification and soil acidification in both Ultisols ; while nitrification was inhibited by the addition of NH4 2SO4, and greater input of NH4 2SO4 led to greater inhibition of nitrification. Ammonia-oxidizing bacteria AOB played an important role in nitrification in cropland soil under acidic conditions.

Addition of urea increased the soil pH at the early stages of incubation due to hydrolysis and stimulated the increase in the AOB population, and thus accelerated nitrification and soil acidification. At the end of incubation, the pH of Ultisol from Jiangxi had decreased by 1. AOB played an important role in nitrification of the cropland soil under acidic conditions. Addition of urea stimulated the increase in the AOB population and thus accelerated nitrification and soil acidification; while addition of NH4 2SO4 inhibited the increase in the AOB population and thus inhibited nitrification.

Biochars impact on soil moisture storage in an Ultisol and two Aridisols. Biochar additions to soils can improve soil water storage capability, however, there is sparse information identifying feedstocks and pyrolysis conditions that maximize this improvement.

Nine biochars were pyrolyzed from five feedstocks at two temperatures and their physical and chemical properties were characterized. Untreated soils served as controls. Soil bulk densities were measured before each leaching event.

For six days thereafter, pot holding capacities PHC for water were determined gravimetrically and were used as a surrogate for soil moisture contents.

Water tension curves were also measured on the biochar treated and untreated Norfolk soil. Both switchgrass biochars caused the most significant water PHC improvements in the Norfolk, Declo and Warden soils compared to the controls. Norfolk soil water tension results at 5 and 60 kPa corroborated that biochar from switchgrass caused the most significant moisture storage improvements.

Significant correlation occurred between the PHC for water with soil bulk densities. In general, biochar amendments enhanced the moisture storage capacity of Ultisols and Aridisols, but the effect varied with feedstock selection and pyrolysis temperature.

Adsorption and desorption of glyphosate in Mollisols and Ultisols soils of Argentina. Glyphosate is the most used pesticide in Argentina. This massive use is attributed to the widespread adoption of no-till management combined with genetically modified crops that are glyphosate resistant e. In this way, the use of glyphosate has created great concern regarding the potential negative impacts it may have in the environment.

The adsorption-desorption process of glyphosate was studied in three Argentinean soils two Mollisols and one Ultisol with contrasting properties: Glyphosate adsorption isotherms were modeled using the Freundlich equation to estimate the adsorption coefficient Kf.

In general, glyphosate adsorption was high and the Kf values varied from