Correlation analysis of spatial variability of Soil available nitrogen and household nitrogen inputs at Pujiang County

The study was conducted in the nursery of Hort. Dept., College of Agriculture and Forestry, Mosul University, Iraq, during 2018 season to study the response of budded "Zaghinia" apricot on seedlings rootstock to bio, organic and chemical fertilizers, and their effects on seedling growth. The studied factors were as follows: Bio fertilizer Fulzyme (0,1and 2 g. seedling-1 ), organic fertilizer (Rice residue) (0, 1 and 2 kg. seedling-1 ) and DAP fertilizers (0, 5 and 10 g. seedling-1 ). The study was performed by using split-split plots within factorial experiment in randomized complete block design (RCBD), with 3 factors and 3 replicates, by using 6 seedlings for each treatment. Treatment means were compared by using Duncan multiple levels at 5% p. the most important results obtained were as follows: 1 and 2 gm.seedling-1 of bio fertilizer (Fulzyme) and Chemical fertilizer (DAP) at the levels 5 and 10 g. seedling-1 affected significantly resulted in a significant increase in soil available nitrogen, while the addition of organic fertilizer (rice residues) and for both levels 1 and 2 kg. Seedling-1 gave a significant increase in nitrogen, phosphorus, ready-made potassium and pH of the seedling soil, and the bilateral interaction had a significant role in the growth of seedlings, especially the treatment of the interaction between the fertilizer (Fulzym) and organic fertilizer (Rice residues), which have a significant effect in giving the best results in available nitrogen, phosphorus and potassium in the soil, and the triple interference also gave a significant increase in all studied traits.

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Using hillslope-scale groundwater model to bridge the gap between basin inputs and river concentrations. The case of nitrates in Brittany (France).

10.5194/egusphere-egu21-10962 ◽

2021 ◽

Author(s):

Luca Guillaumot ◽

Luc Aquilina ◽

Jean-Raynald de Dreuzy ◽

Jean Marçais ◽

Patrick Durand

Keyword(s):

Spatial Variability ◽

Groundwater Resources ◽

Residence Times ◽

Groundwater Model ◽

Nitrogen Inputs ◽

Nitrate Concentrations ◽

Physically Based ◽

Nutrient Surplus ◽

Hillslope Scale

<p>Over the past decades, intensive agriculture has altered surface water and groundwater resources quality. Nutrient surplus increased nitrate concentrations in groundwater and rivers resulting in eutrophication or drinking water risk having ecosystem, sanitary and economic repercussions. Legislations led to a reduction of agricultural inputs of nitrogen since 1990&#8217;s followed by a decrease of nitrate concentrations in rivers, but still difficult to predict and evaluate. Indeed, the incomplete knowledge of the spatial variability of climate and nitrogen inputs, cumulated to the unknown groundwater heterogeneity,&#160; leads to hydrological and biogeochemical processes difficult to model. This study deals with the long-term variations (~decades) of nitrate concentrations in three rivers (~30 km&#178; catchment) located in Brittany. Thus, we focus on groundwater modelling because they constitute the bigger hydrological reservoir. We developed a parsimonious equivalent hillslope-scale groundwater model. The model parameterization, which controls hydrological functioning such as mean groundwater residence times, young water contribution to the river or denitrification, relies on long-term monitored streamflow and nitrate river concentrations. In addition, dissolved CFC were sampled in the catchments. Finally, we found that uncertainty on simulated nitrate river concentrations is low. The physically-based model also brings information on temporal and spatial variability of groundwater residence times highlighting the relative importance of young (1-5 yr) and old waters (~decades) for nitrate river concentrations. Moreover, calibrated models show similar trends looking at two fictive input scenarios from 2015 to 2050.</p>

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Effect of rhizobial inoculants and soil-available nitrogen on strain effectiveness and competition for nodulation in some legumes

Plant Nutrition ◽

10.1007/0-306-47624-x_319 ◽

2001 ◽

pp. 658-659 ◽

Cited By ~ 2

Author(s):

R. A. Abdel-Aziz

Keyword(s):

Available Nitrogen ◽

Soil Available Nitrogen ◽

Rhizobial Inoculants

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Organic fertilizer abrasive grits increase soil available nitrogen, plant height, and biomass

age ◽

10.1002/agg2.20091 ◽

2020 ◽

Vol 3 (1) ◽

Author(s):

Michael Carlson ◽

Frank Forcella ◽

Sam Wortman ◽

David Clay ◽

Sharon A. Clay

Keyword(s):

Plant Height ◽

Organic Fertilizer ◽

Available Nitrogen ◽

Soil Available Nitrogen ◽

Nitrogen Plant

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Quantifying and Mapping of Major, Secondary and Micronutrient Status of Tomato Growing Soils in Kolar District, Karnataka Using GIS and GPS Approach

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2020/v32i1430363 ◽

2020 ◽

pp. 14-27

Author(s):

P. N. Siva Prasad ◽

C. T. Subbarayappa ◽

V. Ramamurthy ◽

A. Sathish

Keyword(s):

Spatial Variability ◽

Soil Fertility ◽

Crop Production ◽

Nutrient Management ◽

Nutrient Status ◽

Available Nitrogen ◽

Micronutrient Status ◽

High Nutrient ◽

Nutrient Index ◽

The Impact

Assessment of land use-induced changes in soil properties is essential for addressing issues of spatial variability in soil fertility and sustainable land productivity. In view of this, a study was conducted to assess the impact of spatial variability on physicochemical properties, macro and micro nutrient status of 75 farmers fields of tomato growing areas of Kolar district, Karnataka. Arc Map with spatial analyst function of Arc GIS software was used to prepare soil fertility maps, which would act as an important tool for soil as well as nutrient management for sustainable crop production by using Global Positioning System coordinates. The results revealed that the soils under investigation were acidic to alkaline in reaction (pH 4.41 to 8.13), mostly non saline and low to high in organic carbon status (0.53 to 1.95%). Available nitrogen, phosphorus, potassium and sulphur content varied from 150.53-348.10, 6.4 - 111.44, 147.18 - 916.61 and 12.29 - 103.8 kg ha-1. Exchangeable Ca, Mg are in the range of 2.5 – 14.2 and 1.2 – 6.6 C mol (p+) kg. The GIS-aided thematic maps with respect to available zinc, 6.67 (low), 21.33 (medium) and 72 (high) per cent samples were categorized, based on the existing critical limits. All the studied samples i.e., 100 per cent were high in copper content, 65.33, 30.67 and 4 per cent samples of Mn, 25.33, 32 and 42.67 per cent samples of Fe, were categorized as low, medium and high in nutrient status respectively. With respect to available boron 16.67 per cent was under low, 38.09 per cent was under medium and 45.24 per cent was under high nutrient status. The nutrient index (NI) of tomato growing areas of Kolar district revealed that N (1.19), manganese (1.39) and iron (1.29) were categorized as low, available boron (2.17) as medium and P (2.65), K (2.71), S (2.65) zinc (2.75), copper (3.0) as high nutrient index category.

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Spatial assessment of soil nitrogen availability and varying effects of related main soil factors on soil available nitrogen

Environmental Science Processes & Impacts ◽

10.1039/c6em00407e ◽

2016 ◽

Vol 18 (11) ◽

pp. 1449-1457

Author(s):

Mingkai Qu ◽

Weidong Li ◽

Chuanrong Zhang ◽

Biao Huang ◽

Yongcun Zhao

Keyword(s):

Spatial Distribution ◽

Soil Nitrogen ◽

Nitrogen Availability ◽

High Availability ◽

Soil Factors ◽

Soil Nitrogen Availability ◽

Available Nitrogen ◽

Distribution Maps ◽

Soil Available Nitrogen ◽

Availability Ratio

Based on the spatial distribution maps of the soil AN and NAR, vulnerability areas with a low available concentration and low/high availability ratio of soil nitrogen were delineated based on different thresholds of the soil AN and NAR.

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Spatial variation of valuable bacterial enzymes in soil: A case study from different agro ecological zones of West Bengal, India

INTERNATIONAL JOURNAL OF EXPERIMENTAL RESEARCH AND REVIEW ◽

10.52756/ijerr.2020.v22.002 ◽

2020 ◽

Vol 22 ◽

pp. 8-19

Author(s):

Subarna Bhattacharyya ◽

◽

Jayita Chopra ◽

Rashmi Khushboo Minz ◽

Mousumi Chakraborty ◽

...

Keyword(s):

Spatial Variability ◽

West Bengal ◽

Variable Parameter ◽

Available Phosphorus ◽

Organic Carbon Content ◽

Nitrogen And Phosphorus ◽

Available Nitrogen ◽

Ecological Zones ◽

Sampling Zone ◽

Major Nutrients

The spatial variability of cellulase, amylase, protease and pectinase activities were evaluated from four zones of West Bengal, India. The enzyme production data was plotted on the map of the study areas and spatial variability of cellulase, amylase, protease and pectinase activity was obtained. Available nitrogen of the soil was the most variable parameter with changing enzyme activity. It also varied with the available phosphorus but the variation was least with organic carbon content of the soil. Amylase was correlated with pectinase, available nitrogen and phosphorus. Cellulase was correlated with only available nitrogen; protease was correlated with pectinase and Pectinase was correlated with available nitrogen of the soil of the four sampling zone. Except protease activity, other enzymes were significantly correlated with bacterial density of the soil. These findings ultimately develop relationship among soil major nutrients and the map can be used for future enzyme bioprospecting in West Bengal, India.

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Soil nutrient status mapping of Nagenahalli micro-watershed underEastern Dry Zone of Karnataka by Remote Sensing,Detailed Soil Survey and GIS Techniques

Indian Journal of Agricultural Research ◽

10.18805/ijare.v0iof.3762 ◽

2016 ◽

Author(s):

K.S Anil Kumar ◽

C. N. Nalina ◽

M. Chandrakala ◽

S. Sheela Rani ◽

K. Sujata ◽

...

Keyword(s):

Spatial Variability ◽

Soil Nutrient ◽

Nutrient Status ◽

Soil Survey ◽

Small Scale ◽

Available Nitrogen ◽

Gis Techniques ◽

Dry Zone ◽

Phosphorous Content ◽

Crop Parameters

Soil nutrients are essential for crop growth. Spatial variability of nutrients can occur in various scales, between regions, between fields or within the field. RS and GIS techniques enables farm management based on small-scale spatial variability of soil and crop parameters in the field. The present study was carried out in Nagenahalli microwatershed, Doddaballapur taluk, Bangalore rural district with the objective to determine and map the macronutrient status of soils in the watershed using GIS technique. The NPK was analyzed and mapped using Arc GIS to quantify the level of spatial nutrients availability. Results indicated that NPK ranged from 31.36 to 376.32 kg ha-1(N), 21.29 to 390.62 kg ha-1 (P2O5) and 55.10 to 521.47 kg ha-1 (K2O) respectively in the surface soils. Nutrient map showed that the soils were poor in available nitrogen and available potassium whereas sufficient in available phosphorous content. Furthermore NPK map can be used to identify deficient or sufficient areas for efficient fertilizer management.

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