SOIL NUTRIENT CHANGES WITH FERTILIZER TYPE IN CASSAVA-BASED CROPPING SYSTEM

2002 ◽  
Vol 25 (10) ◽  
pp. 2303-2313 ◽  
Author(s):  
E. A. Makinde ◽  
A. A. Agboola
Keyword(s):  
Cropping System ◽  
Soil Nutrient ◽  
Nutrient Changes

scholarly journals Sebaran Limbah Residu CPO (Crude Palm Oil) Bawah Permukaan Tanah Pada PT. SSDP Dengan Aplikasi Geolistrik

2014 ◽  
Vol 1 (2) ◽  
pp. 109
Author(s):  
Dodi Irwan Siregar ◽  
Thamrin Thamrin ◽  
Muhammad Edisar
Keyword(s):  
Palm Oil ◽  
Soil Nutrient ◽  
Field Measurements ◽  
Oil Industry ◽  
Nutrient Content ◽  
Soil Resistivity ◽  
Before And After ◽  
Nutrient Changes ◽  
Bray 1 ◽  
Properties Of Soil

One of the environmental problems caused by the increasing growth of the industry.Industrial waste generated that goes into the soil can alter soil properties. This studyreviewing the nature of the soil as a result of the distribution of residual waste CPO (CrudePalm Oil) industry mills. This study uses the characteristics of resistivity and soil nutrientproperties. Soil resistivity properties were tested by making a model before and after thedistribution of waste residue does CPO. Then validated against field measurements, fieldmeasurements comparing the data with the model. To see the changes in nutrient content ofsoil Laboratory Testing properties of soil nutrient changes. The results showed that theresistivity properties change and nutrient content of the soil before and after the distributionof waste residue subjected CPO. Soil resistivity values that have mixed by CPO residualwaste is higher than the value of soil resistivity is not mixed waste palm oil residues, while thecontent of soil nutrients among other properties, increasing soil pH, Include content C-Organic (%) / Inceneration, P-Available (ppm) / Bray-1, N-Total (%) / Kjedahl decreaseddramatically. 

scholarly journals Response of soil sulfur availability to elevation and degradation in the Wugong Mountain meadow, China

2017 ◽  
Vol 63 (No. 6) ◽  
pp. 250-256 ◽  
Author(s):  
Li Zhi ◽  
Zhang Ling ◽  
Chen Jing ◽  
Zhang Xueling ◽  
Yu Suqin ◽  
...  
Keyword(s):  
Nutrient Management ◽  
Soil Nutrient ◽  
Principal Component ◽  
Elevation Gradients ◽  
Nutrients Cycling ◽  
Phosphorus And Potassium ◽  
Major Nutrients ◽  
Nutrient Changes ◽  
Soil Sulfur ◽  
Nitrogen Phosphorus

Vegetation restorations of degraded meadows have been widely implemented. The evaluation of soil nutrient changes as affected by degradation is vital for efficient restorations. However, while macronutrients (nitrogen, phosphorus and potassium) have been widely investigated, sulfur (S) as one important element correlated tightly with other nutrients has not been thoroughly studied. Two studies were conducted to determine changes of sulfur as affected by degradation and elevation gradients. The results showed that available S (AS) changed non-linearly with elevation and the first principal component based on other soil nutrient variables. Soil AS depended on degradation levels and contributed substantially to the separation of meadows with different degradation levels. Moreover, AS responded stronger to changes in elevation gradients and degradation levels compared with other major nutrients. Thereby, AS could be an important nutrient responding to meadow disturbance, which should be considered in future studies on meadow soil nutrients cycling and vegetation restorations. The findings have implications for ecological restoration of degraded meadows with respect to soil nutrient management and conservations.

scholarly journals Impact of depth of placement of mineral fertilizer micro-dosing on growth, yield and partial nutrient balance in pearl millet cropping system in the Sahel

2014 ◽  
Vol 153 (8) ◽  
pp. 1412-1421 ◽  
Author(s):  
A. IBRAHIM ◽  
D. PASTERNAK ◽  
D. FATONDJI
Keyword(s):  
Pearl Millet ◽  
Root Length Density ◽  
Nutrient Balance ◽  
Growth Yield ◽  
Cropping System ◽  
Soil Nutrient ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Different Depths ◽  
Positive Effect

SUMMARYA study was carried out in the rainy seasons of 2008 and 2009 in Niger to investigate the effects of fertilizer micro-dosing on root development, yield and soil nutrient exploitation of pearl millet. Different rates of diammonium phosphate (DAP) were applied to the soil at different depths and it was found that although micro-dosing with DAP increased grain yield over the unfertilized control to a similar level as broadcast DAP, doubling the micro-dosage did not increase it further. Increasing the depth of fertilizer application from 5 to 10 cm resulted in significant increases in root length density, and deep application of fertilizer resulted in higher yields, although the increases were generally not significant. It was postulated that the positive effect of micro-dosing resulted from better exploitation of soil nutrients because of the higher root volume. Levels of nutrients exported from the soil were at least as high in plants receiving micro-dosing as the unfertilized control, and plants receiving micro-dosing exported 5–10 times more phosphorus from the soil than the amount added through fertilization.

Impact of Soil Nutrient Contents and Spatial Variability in Different Sampling Schemes under the Conservation Tillage

2013 ◽  
Vol 718-720 ◽  
pp. 316-320
Author(s):  
Si Jia Li ◽  
Yan Nan Sun ◽  
Hong Bin Wang ◽  
Zhi Wen Chen
Keyword(s):  
Conservation Tillage ◽  
Cropping System ◽  
Soil Nutrient ◽  
Parent Material ◽  
Available P ◽  
Moderate Intensity ◽  
Structural Factors ◽  
Available N ◽  
Nutrient Contents ◽  
Sampling Schemes

According to the 40×40m mesh, taking the 180 soil samples in both strains and ridges of the demonstration fields under the stalk mulching conservation tillage for 5 consecutive years in Gaojia country, which the area covers 15 hm2 in Li Shu town, Jilin Province. The available N, available P, available K and other nutrition of soil in different sampling schemes have been tested. Based on the platform of GIS and the method of geostatistical analyst, the space distribution's characteristics of the three kinds of soil's nutrients have been researched, which demonstrate each variable corresponds normal distribution, the contents of available N and available K in different sampling schemes vary so much, but the content of available P has shown much more similarity than difference. Through the analysis of semivariogram, the soil nutrients in every different sampling schemes have revealed a moderate intensity autocorrelation and a relative strong spatial heterogeneity, which are affected by structural factors such as soil types, parent material, terrain, climate, hydrological conditions and so on, and they are also affected by random factors, for example, fertilization, cropping system, tillage operation and management. Analyzing the three nutrients in different sampling schemes, which are affected by random factors. Through applying the semivariogram and kriging to analyze the impacts factors of spatial variable in the soil, there are the differences between the two methods.

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