scholarly journals Stoichiometric Characteristics of Soil in Several Different Communities

2018 ◽  
Vol 53 ◽  
pp. 03057
Author(s):  
Xinyu Liu ◽  
Shengxiu Li ◽  
Fang Luo ◽  
Yan Ning ◽  
Biao Huang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Plant Communities ◽  
Robinia Pseudoacacia ◽  
Salt Content ◽  
Organic Matter Content ◽  
Nutrient Status ◽  
Matter Content ◽  
Chemical Measurement ◽  
Available Phosphorus ◽  
Nitrogen Phosphorus

The content of nitrogen, phosphorus, potassium and organic matter in soil is an important index to determine soil nutrient status. In this paper, the contents of nitrogen, phosphorus, potassium, organic matter and soil salt in the soil of several different plant communities in the campus were measured by the chemical measurement characteristics of several different communities in University of Jinan. The differences in the measurement characteristics of soil chemical measurement in different plant communities were analyzed. The results showed that the highest organic matter content in several communities was Cherry Blossom community, 76.33mg/kg, and the highest ammonium nitrogen content was 196.08mg/kg; the highest content of available phosphorus was the community of Begonia, 168.14mg/kg, and the highest content of available potassium was the community of Robinia pseudoacacia, which was the highest salt content in 64.99mg/kg soil. The community of cherry blossoms is 569 μs. There was little difference in soil organic matter, available phosphorus and available potassium in different plant communities..

scholarly journals Soil Fertility and Leaf Nutrient Status of Mango Orchard Sites

2020 ◽  
Vol 29 (2) ◽  
pp. 155-163
Author(s):  
Sk Musfiq Us Salehin ◽  
Gazi Md Mohsin ◽  
Tabassum Ferdous ◽  
Jobaed Ragib Zaman ◽  
Md Jashim Uddin ◽  
...  
Keyword(s):  
Organic Matter ◽  
Mangifera Indica ◽  
Organic Matter Content ◽  
Nutrient Status ◽  
Matter Content ◽  
Silty Clay ◽  
Leaf Sample ◽  
Available Nitrogen ◽  
Total N ◽  
Nitrogen Phosphorus

Twenty soil and leaf samples from 20 orchards of mango (Mangifera indica L.) were collected from different locations of Rajshahi and Satkhira regions to evaluate soil texture, pH, organic matter, available and total nitrogen, phosphorus, potassium and sulfur of soils and the concentration of N and K in mango leaves. The pH of the soil varied from 6.3 - 7.9 and organic matter content varied from 0.72 - 3.60 per cent. The available nitrogen, phosphorus, potassium, and sulfur of the soils ranged from 190 - 510, 39 - 196, 36 - 206 and 25 - 235 mg/kg, respectively. The values of total N, P, K and S were 0.03 - 0.12, 0.022 - 0.210, 0.235 - 0.0.936 and 0.005 - 0.266 per cent, respectively. The dominant soil textural class was silty clay loam. The mean concentration of nitrogen (0.88%) and potassium (0.61%) in the leaf sample was low. The overall fertility status of the soils of Rajshahi and Satkhira regions in relation to mango cultivation is moderate. Dhaka Univ. J. Biol. Sci. 29(2): 155-163, 2020 (July)

scholarly journals Spectral Response of Water Under Different Concentrations of Suspended Sediment: Measurement and Simplified Modeling

2019 ◽  
Vol 11 (3) ◽  
pp. 327
Author(s):  
J. W. B. Lopes ◽  
F. B. Lopes ◽  
E. M. de Andrade ◽  
L. C. G. Chaves ◽  
M. G. R. Carneiro
Keyword(s):  
Organic Matter ◽  
Suspended Sediment ◽  
Spectral Response ◽  
Salt Content ◽  
Organic Matter Content ◽  
Textural Properties ◽  
Sediment Concentration ◽  
Matter Content ◽  
Irrigated Agriculture ◽  
Spectral Partitioning

Understanding the spectral behaviour of water is of the greatest importance to the quality management of water resources. Continuous monitoring by remote sensing is therefore essential for administrators seeking the efficient management of its many uses. The aim of this research was to characterise the spectral response of water submitted to different concentrations of sediments of varying textural properties, organic matter and salts, and to identify the implications of these characteristics using simplified modelling. The experiment was conducted at the Radiometry Laboratory of the Department of Agricultural Engineering of the Federal University of Ceará, Brazil. The soils used in the research came from two areas of irrigated agriculture in Ceará, one in Morada Nova and the other in Pentecoste. Both soils were classified as Fluvic Neosols; the first saline and the second saline-sodic, and presented significant differences in granulometric composition and organic matter content. From the results, it can be concluded that: (i) sediments added at different concentrations cause an increase and deformation of the reflectance curves, and that maximum spectral partitioning occurs at two reflectance peaks; (ii) derivative analysis favours the identification of wavelengths that best differentiate sediment concentration, allowing more-efficient modelling of the process; (iii) the characteristics of texture, organic matter and salt content have little effect on estimating suspended-sediment concentration in the water, making multiple linear regression modelling a viable option for this purpose.

Soil properties associated with formation of barren areas on formed dykelands cropped to forage

1993 ◽  
Vol 73 (4) ◽  
pp. 527-538 ◽  
Author(s):  
A. V. Rodd ◽  
K. B. McRae ◽  
J. B. Harnish ◽  
H. W. Kolstee
Keyword(s):  
Organic Matter ◽  
Bulk Density ◽  
Salt Content ◽  
Organic Matter Content ◽  
Sodium Content ◽  
Matter Content ◽  
Available P ◽  
Growing Conditions ◽  
Plant Available P ◽  
Resistance To Penetration

Acadia or dykeland soils have produced forages successfully for centuries. The formation of barren areas within very productive forage stands has been noted recently in some land-formed fields, indicating either poor germination or poor growing conditions. A survey was undertaken in 1988 to determine the differences in soil attributes between barren and productive areas, namely: topographical position, resistance to penetration, bulk density, pH, plant-available P2O5, -K2O, Ca, and Mg, salt content (as measured by conductivity and sodium adsorption ratio), and exchangeable and soluble Ca, Mg, K and Na. Barren areas had greater: plant-available P2O5, resistance to penetration (the differential ranged from 480 to 1440 kPa), bulk density (in the top 15 cm), salt and sodium content than the productive ones. The exchangeable and soluble Na:Mg and Na:Ca ratios were higher on barren areas than on productive areas. Organic matter content was lower on barren than on productive areas. Values for topographic position, pH, particle size classes and plant-available K2O, Ca, and Mg were similar between the productivity areas. The results of this survey indicate that the formation of barren areas appears to be mainly due to accumulation of excess salts, especially sodium. Reasons for salt accumulation in these areas are discussed. Key words: Acadia soils, dykeland, salt, sodium, organic matter, resistance to penetration

scholarly journals Soil pH and Nutrient Characteristics of Newly-added Cultivated Land in Heyang, China

2020 ◽  
Vol 204 ◽  
pp. 01013
Author(s):  
Gang Li ◽  
Ruiqing Zhang ◽  
Ying Wang ◽  
Nan Lu ◽  
Yang Wei ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Total Nitrogen ◽  
Soil Ph ◽  
Ph Value ◽  
Organic Matter Content ◽  
Matter Content ◽  
Available Phosphorus ◽  
Cultivated Land ◽  
Soil Available Phosphorus

In order to understand the soil pH and main nutrient characteristics of newly added cultivated land in the eastern part of Guanzhong, and 160 soil samples were collected in 2016, the soil pH, organic matter, total nitrogen, available phosphorus and available potassium in Heyang County were studied The suitability distribution of the indicators, using stepwise regression and path analysis methods, analyzes the direct relationship between soil pH and soil nutrients, and provides a theoretical basis for improving the newly added cultivated land. The results showed that the soil pH in Heyang County varied from 8.42 to 9.67, the soil organic matter content varied from 3.46 to 17.93 g/kg, the soil total nitrogen content varied from 0.13 to 5.61 g/kg, and the soil available phosphorus changed The range is 1.73 ~ 63.06 mg/kg, and the soil available potassium range is 46.50 ~ 523.74. The newly added soil has a certain nutrient basis, but it should be further adjusted and improved during the cultivation process. The direct positive effect on soil pH value is mainly soil organic matter, and the direct negative effect is mainly soil available phosphorus. By adjusting the organic matter, total nitrogen, available phosphorus and available potassium in the soil, the pH value of the soil can be effectively improved, so that the newly cultivated soil is suitable for the growth of local crops.

scholarly journals Exploring Momardica Charantia Leaves as Biopesticide Against Mealy Bugs: A Comparative Study

2020 ◽  
pp. 94-98
Author(s):  
Vandana Gupta ◽  
Sonal Deshmukh
Keyword(s):  
Organic Matter ◽  
Azadirachta Indica ◽  
Organic Matter Content ◽  
Matter Content ◽  
Soil Parameters ◽  
Test Plant ◽  
Available Phosphorus ◽  
Neem Leaves ◽  
Chemical Pesticide ◽  
Plant Characteristics

A pesticide is a substance used for controlling pests that damage the crops. Azadirachta indica (Neem) is widely studied and commercially used as a biopesticide against various pests. The present study aims to explore Momardica charantia (Bitter gourd) leaves as a biopesticide and compare its effectiveness with the Azadirachta indica (Neem) leaves and chemical pesticide (Admire). The test plant used for study is Hibiscus rosa-sinensis infected with Red Hibiscus mealy bug. Soil parameters (pH, conductivity, organic matter content, available potassium and available phosphorus) and plant characteristics (height, leaves count, flowering and chlorophyll content) of all test plants under study were estimated and compared. The soil parameter like pH showed no changes in control and treated plants while organic matter, available potassium and available phosphorus comparatively showed slight increase in concentration in plants treated with all pesticides. The plant characteristics viz. height, leaf count and branching showed improvement in growth after treatment with pesticides.All the pesticides under study were capable to kill mealy bugs in one month. Even though the biopesticidal property of Momardicacharantia leaves was found to be less as compared to Azadirachta indica leaves and chemical pesticide (Admire), it can be used effectively to control mealy bugs infecting Hibiscus plant.

THE EFFECT OF SAWDUST, STRAW, COMPOST AND MANURE ON THE YIELD AND CHEMICAL COMPOSITION OF STRAWBERRIES AND ON SOIL MOISTURE, ACIDITY AND ORGANIC MATTER CONTENT

1961 ◽  
Vol 41 (1) ◽  
pp. 42-49 ◽  
Author(s):  
G. R. Webster
Keyword(s):  
Organic Matter ◽  
Soil Moisture ◽  
Soil Organic Matter ◽  
Soil Acidity ◽  
Organic Matter Content ◽  
Nutrient Content ◽  
Matter Content ◽  
Soil Organic Matter Content ◽  
Per Se ◽  
Nitrogen Phosphorus

Sawdust, straw, compost and manure were applied under dryland conditions to strawberry plantings at two locations. The effects on yield, leaf nutrient content, soil moisture, soil acidity and soil organic matter content were evaluated. Sawdust mulch and sawdust incorporation, the former being slightly better, produced highly significant increased yields over the check treatment and were superior to all other treatments. Soil moisture measurements showed that the sawdust treatments conserved soil moisture and this was regarded as the chief reason for the increased yields. The nitrogen, phosphorus, potassium, calcium and magnesium contents of leaves were affected somewhat by the treatments but the levels were considered adequate in all cases.Soil acidity was significantly increased in the sawdust plots but this was attributed to the additional nitrogen applied rather than to the sawdust per se. Sawdust incorporation, manure and compost treatments significantly increased soil organic matter content when compared to the check treatment.

Soil Assessment in Mount Kasunogan’s West Ridge

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
MEVILREN ALMENDRAS ◽  
NINEVEH ESCAÑAN ◽  
ERICKA GABRONINO ◽  
KEVIN CLINT LARITA ◽  
JAN MEL XYLOR OCHAVILLO ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Matter Content ◽  
Simple Random Sampling ◽  
Test Methods ◽  
The Philippines ◽  
Matter Content ◽  
Available Phosphorus ◽  
Exchangeable Potassium ◽  
The West ◽  
Ph Level

The soil remains a fundamental asset to human survival and plant development. Soil degradation is additionally a major agricultural and ecological issue in the Philippines as it incredibly influences soil efficiency. This study focused on the soil in the west ridge of Mount Kasunogan, a notable constraint regarding the mountain’s soil quality. The quality of the soil hindered many people who had been trying to rehabilitate the mountain. This research was conceptualized to determine the soil’s soil content in the west ridge of Mount Kasunogan in terms of soil texture, organic matter content, available phosphorus, and exchangeable potassium. This study utilized simple random sampling to gather the soil samples and performed various soil test methods: Potentiometric Method, Walkley-Black Method, Cold-Sulfuric Acid Method, Olsen Method, and Feel Method. Results have shown that the soil in the west ridge is slightly acidic with a pH level of six and eighty-nine (6.89), has low available phosphorus content with one and four (1.4) ppm, moderately deficient exchangeable potassium content of thirty-eight and thirteen (38.13) ppm, and a low percentage of organic matter with only one and sixty-nine (1.69 %) percent. It was recommended that another soil sampling be done to the areas not covered by this study due to the steepness and vastness of the west ridge of Mount Kasunogan.

scholarly journals Physical and Chemical Properties of Soils in Gambari Forest Reserve Near Ibadan, South Western Nigeria.

2020 ◽  
Vol 7 (2) ◽  
pp. 57-67 ◽  
Author(s):  
Akintola Opeyemi ◽  
Bodede Adewunmi ◽  
Abiola Oluwaseyi
Keyword(s):  
Organic Matter ◽  
Bulk Density ◽  
Total Nitrogen ◽  
Sandy Loam ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Matter Content ◽  
Available Phosphorus ◽  
Forest Reserve ◽  
Physical And Chemical

The different features of soil greatly affect the flora and vegetative diversity of a forest. The physical and chemical characteristics of soils in Onigambari Forest Reserve were evaluated to assess the fertility and productivity status of the soils. Fifteen soil samples collected from different sample locations were analyzed for soil texture (sand, silt and clay), bulk density, porosity, pH, organic matter, total nitrogen, available phosphorus, exchangeable bases (Na, K, Ca and Mg) and available micronutrients (Zn, Cu, Fe and Mn). Texturally, the studied soils were loamy sand and sandy loam with percentage of sands (71.2-84.2 %), silts (7.4-10.4 %) and clay (6.4-19.4 %). The bulk density of the soils was 1.61-1.83 % while the porosity of the soils ranged from 35.2-44.1 %. The slightly acidic to neutral soil pH (5.90 - 6.60) and medium organic matter content (1.68 -2.60 %) suggest adequate level of soil nutrients. The soils had high total nitrogen (0.35 -0.65 %) and available phosphorus contents between 10.98 and 18.22mg/kg.

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