Prediction of total nitrogen in cropland soil at different levels of soil moisture with Vis/NIR spectroscopy

2014 ◽  
Vol 64 (3) ◽  
pp. 267-281 ◽  
Author(s):  
Yaolin Liu ◽  
Qinghu Jiang ◽  
Tiezhu Shi ◽  
Teng Fei ◽  
Junjie Wang ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Total Nitrogen ◽  
Nir Spectroscopy ◽  
Different Levels

scholarly journals Estimating Soil Organic Carbon of Cropland Soil at Different Levels of Soil Moisture Using VIS-NIR Spectroscopy

2016 ◽  
Vol 8 (9) ◽  
pp. 755 ◽  
Author(s):  
Qinghu Jiang ◽  
Yiyun Chen ◽  
Long Guo ◽  
Teng Fei ◽  
Kun Qi
Keyword(s):  
Soil Moisture ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Nir Spectroscopy ◽  
Different Levels

Prediction of soil organic carbon for different levels of soil moisture using Vis-NIR spectroscopy

Geoderma ◽  
2013 ◽  
Vol 199 ◽  
pp. 37-42 ◽  
Author(s):  
Marco Nocita ◽  
Antoine Stevens ◽  
Carole Noon ◽  
Bas van Wesemael
Keyword(s):  
Soil Moisture ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Nir Spectroscopy ◽  
Different Levels

scholarly journals Disturbances to the Ground and to the Stand in Beech Forests Due to Thinning Treatments Performed by Different Levels of Mechanization

2020 ◽  
Vol 3 (1) ◽  
pp. 58
Author(s):  
Rachele Venanzi ◽  
Loredana Barbona ◽  
Francesco Latterini ◽  
Rodolfo Picchio
Keyword(s):  
Soil Moisture ◽  
Forest Soil ◽  
Anthropogenic Impacts ◽  
Tree Canopy ◽  
Forest Operations ◽  
Beech Forests ◽  
High Soil Moisture ◽  
Forest Logging ◽  
Fagus Sylvatica L ◽  
Different Levels

The aim of this work was to assess the possible impacts on the forest soil and stand due to silvicultural treatment and forest operations in a beech high forest. Even aged beech forests (Fagus sylvatica L.) in the Municipality of Cappadocia (L’Aquila) and in the Municipality of Vallepietra (Roma) were analyzed. The analysis of the soil and stand were performed in order to assess the effects attributable to applied silviculture and forest logging. Two different logging methodologies (in particular for the extraction) were applied: mules were used in the areas with greater slopes and with obstacles, while for the areas with better accessibility, mechanical means were used, in this case tractors. In detail, the main objective was to assess the disturbance on the ground and on the stand, generated by the two different levels of mechanization. In addition, it was also interesting to understand the possible effect on the soil and specifically on the partial uncovering where part of the tree canopy was removed. Only through an accurate cross-analysis of the studied parameters and indices could the anthropogenic impacts on the soil and stand due to forest operations be highlighted according to the different logging methodologies applied. The main results showed that the disturbances caused to the soil and stand were essentially caused in the bunching and extraction operations. The importance of avoiding or limiting the continuous passage of vehicles and animals on forest soil clearly emerges, especially in conditions of high soil moisture. It is also important to use correct technologies that are adequate for the specific environmental characteristics and the work plan. Finally, it can be said that there was no difference in the disturbance caused by the two logging methods when compared. Substantial differences in terms of improvement can be defined when comparing the findings of this study with other research studies. This can be done by applying a different type of mechanization with a different logging system.

scholarly journals Root and shoot responses of upland New Rice for Africa varieties to fluctuating soil moisture conditions as affected by different levels of nitrogen fertilization

2020 ◽  
Vol 206 (3) ◽  
pp. 322-337
Author(s):  
Daniel Makori Menge ◽  
Mana Kano‐Nakata ◽  
Akira Yamauchi ◽  
Roel Rodriguez Suralta ◽  
Daigo Makihara
Keyword(s):  
Soil Moisture ◽  
Nitrogen Fertilization ◽  
Moisture Conditions ◽  
Different Levels

scholarly journals Seasonal dynamics of soil microbial biomass C and N of Keteleeria fortunei var. cyclolepis forests with different ages

2019 ◽  
Vol 31 (6) ◽  
pp. 2377-2384
Author(s):  
Yong Wang ◽  
Xiongsheng Liu ◽  
Fengfan Chen ◽  
Ronglin Huang ◽  
Xiaojun Deng ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Seasonal Variation ◽  
Microbial Biomass ◽  
Soil Nutrients ◽  
Total Nitrogen ◽  
Soil Microbial Biomass ◽  
Soil Layer ◽  
Soil Layers ◽  
Soil Microbial ◽  
Young Forest

Abstract Soil microbial biomass is an important indicator to measure the dynamic changes of soil carbon pool. It is of great significance to understand the dynamics of soil microbial biomass in plantation for rational management and cultivation of plantation. In order to explore the temporal dynamics and influencing factors of soil microbial biomass of Keteleeria fortunei var. cyclolepis at different stand ages, the plantation of different ages (young forest, 5 years; middle-aged forest, 22 years; mature forest, 40 years) at the Guangxi Daguishan forest station of China were studied to examine the seasonal variation of their microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) by chloroform fumigation extraction method. It was found that among the forests of different age, MBC and MBN differed significantly in the 0–10 cm soil layer, and MBN differed significantly in the 10–20 cm soil layer, but there was no significant difference in MBC for the 10–20 cm soil layer or in either MBC or MBN for the 20–40 cm soil layer. With increasing maturity of the forest, MBC gradually decreased in the 0–10 cm soil layer and increased firstly and then decreased in the 10–20 cm and 20–40 cm soil layers, and MBN increased firstly and then decreased in all three soil layers. As the soil depth increased, both MBC and MBN gradually decreased for all three forests. The MBC and MBN basically had the same seasonal variation in all three soil layers of all three forests, i.e., high in the summer and low in the winter. Correlation analysis showed that MBC was significantly positively correlated with soil organic matter, total nitrogen, and soil moisture, whereas MBN was significantly positively correlated with soil total nitrogen. It showed that soil moisture content was the main factor determining the variation of soil microbial biomass by Redundancy analysis. The results showed that the soil properties changed continuously as the young forest grew into the middle-aged forest, which increased soil microbial biomass and enriched the soil nutrients. However, the soil microbial biomass declined as the middle-age forest continued to grow, and the soil nutrients were reduced in the mature forest.

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