scholarly journals SIGNIFICANCE OF SOIL FERTILITY INDICATORS FOR MONITORING

2021 ◽  
Vol 4 (2) ◽  
pp. 98-103
Author(s):  
Yury S. Larionov ◽  
Valeriy B. Zharnikov ◽  
Evgeniya I. Baranova ◽  
Olga A. Larionova ◽  
Gennady N. Kovalivker
Keyword(s):  
Organic Matter ◽  
Soil Fertility ◽  
Organic Substance ◽  
Crop Productivity ◽  
Total Biomass ◽  
Modern Information ◽  
The Law

The need to search for integral indicators of soil fertility for monitoring based on the control of the synthesis of total biomass (the organic substance underlying the law of soil fertility) and crop productivity using modern information (primarily unmanned technologies) is justified in order to obtain detailed information on soil fertility occupied by crops. At the same time, it is important to develop methods for monitoring the balance of organic matter of the soil, reflecting its mineralization, humification and other types of its transformation.

scholarly journals Assessment of Potato Farmland Soil Nutrient Based on MDS-SQI Model in the Loess Plateau

2021 ◽  
Vol 13 (7) ◽  
pp. 3957
Author(s):  
Yingying Xing ◽  
Ning Wang ◽  
Xiaoli Niu ◽  
Wenting Jiang ◽  
Xiukang Wang
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Fertility ◽  
Soil Quality ◽  
Soil Nutrients ◽  
Organic Matter Content ◽  
Soil Nutrient ◽  
Matter Content ◽  
Soil Organic Matter Content ◽  
Farmland Soil

Soil nutrients are essential nutrients provided by soil for plant growth. Most researchers focus on the coupling effect of nutrients with potato yield and quality. There are few studies on the evaluation of soil nutrients in potato fields. The purpose of this study is to investigate the soil nutrients of potato farmland and the soil vertical nutrient distributions, and then to provide a theoretical and experimental basis for the fertilizer management practices for potatoes in Loess Plateau. Eight physical and chemical soil indexes were selected in the study area, and 810 farmland soil samples from the potato agriculture product areas were analyzed in Northern Shaanxi. The paper established the minimum data set (MDS) for the quality diagnosis of the cultivated layer for farmland by principal component analysis (PCA), respectively, and furthermore, analyzed the soil nutrient characteristics of the cultivated layer adopted soil quality index (SQI). The results showed that the MDS on soil quality diagnosis of the cultivated layer for farmland soil included such indicators as the soil organic matter content, soil available potassium content, and soil available phosphorus content. The comprehensive index value of the soil quality was between 0.064 and 0.302. The SPSS average clustering process used to classify SQI was divided into three grades: class I (36.2%) was defined as suitable soil fertility (SQI < 0.122), class II (55.6%) was defined as moderate soil fertility (0.122 < SQI < 0.18), and class III (8.2%) was defined as poor soil fertility (SQI > 0.186). The comprehensive quality of the potato farmland soils was generally low. The proportion of soil nutrients in the SQI composition ranged from large to small as the soil available potassium content = soil available phosphorus content > soil organic matter content, which became the limiting factor of the soil organic matter content in this area. This study revolves around the 0 to 60 cm soil layer; the soil fertility decreased gradually with the soil depth, and had significant differences between the respective soil layers. In order to improve the soil nutrient accumulation and potato yield in potato farmland in northern Shaanxi, it is suggested to increase the fertilization depth (20 to 40 cm) and further study the ratio of nitrogen, phosphorus, and potassium fertilizer.

scholarly journals Potential of Alnus acuminata based agroforestry for carbon sequestration and other ecosystem services in Rwanda

2021 ◽  
Author(s):  
Athanase R. Cyamweshi ◽  
Shem Kuyah ◽  
Athanase Mukuralinda ◽  
Catherine W. Muthuri
Keyword(s):  
Ecosystem Services ◽  
Carbon Sequestration ◽  
Soil Fertility ◽  
Tree Age ◽  
Average Height ◽  
Total Biomass ◽  
Biomass Carbon ◽  
Alnus Acuminata ◽  
Sequestration Potential ◽  
Old Trees

AbstractAlnus acuminata Kunth. (alnus) is widely used in agroforestry systems across the globe and is believed to provide multiple ecosystem services; however, evidence is lacking in agroforestry literature to support the perceived benefits, particularly in Rwanda. To understand carbon sequestration potential and other benefits of alnus, a household survey, tree inventory and destructive sampling were conducted in north-western Rwanda. Over 75% of the respondents had alnus trees in their farms. The trees provide stakes for climbing beans, firewood and timber. They also improve soil fertility and control soil erosion. Farmers had between 130 and 161 alnus trees per hectare with an average height of 7.7 ± 0.59 m and diameter at breast height of 16.3 ± 1.39 cm. The largest biomass proportion was found in stems (70.5%) while branches and leaves stock about 16.5 and 13% of the total biomass, respectively. At farm level, aboveground biomass of alnus trees was estimated to be 27.2 ± 0.7 Mg ha−1 representing 13.6 Mg of carbon (C) per hectare. Biomass carbon increased with tree size, from 7.1 ± 0.2 Mg C ha−1 in 3 years old trees to 34.4 ± 2.2 Mg C ha−1 in 10 years old trees. The converse was observed with elevation; biomass carbon decreased with increasing elevation from 21.4 ± 1.29 Mg C ha−1 at low (2011–2110 m) to 9.6 ± 0.75 Mg C ha−1 in the high elevation (> 2510 m). In conclusion, alnus agroforestry significantly contributes to carbon sequestration, although the magnitude of these benefits varies with tree age and elevation. Planting alnus trees on farms can meet local needs for stakes for climbing beans, wood and soil fertility improvement, as well as the global need for regulation of climate change.

scholarly journals Soil fertility relates to fungal‐mediated decomposition and organic matter turnover in a temperate mountain forest

2021 ◽  
Author(s):  
Mathias Mayer ◽  
Boris Rewald ◽  
Bradley Matthews ◽  
Hans Sandén ◽  
Christoph Rosinger ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Fertility ◽  
Mountain Forest ◽  
Organic Matter Turnover

scholarly journals Soil fertility status of some of the intensive crop growing areas under major agroecological zones of Bangladesh

2016 ◽  
Vol 41 (4) ◽  
pp. 735-757 ◽  
Author(s):  
NC Shil ◽  
MA Saleque ◽  
MR Islam ◽  
M Jahiruddin
Keyword(s):  
Organic Matter ◽  
Soil Fertility ◽  
Calcareous Soils ◽  
Clay Content ◽  
Soil Samples ◽  
Exchangeable K ◽  
Low Level ◽  
Fertility Status ◽  
Agroecological Zones ◽  
High Level

Laboratory studies on soil fertility evaluation was carried out across major agroecological zones (AEZs) of Bangladesh to know the nutrient status of soils and to relate those with soil properties like pH, organic matter, CEC, and clay content. Thirty five composite soil samples were collected from intensive crop growing sites, which covered 17 AEZs of Bangladesh. After proper processing, the samples were analyzed for texture, pH, organic carbon, CEC, exchangeable cations (K, Ca, Mg and Na), total N, available P and S following standard methods. The textural class of the soils collected from AEZ 12 and 13 appeared to be mostly clay. Clay loam soil was found in AEZ 4, 8, 9, 11, 25 and 28. Loamy soil was seen in AEZ 1 while AEZ 22, 23 and 29 were mostly sandy textured. The results revealed that 65.7% of the tested soil was acidic while 25.7% was alkaline in nature. All the tested soils showed lower pHKCl compared to pHH2O thus possessed negative charge. About 68.6% of the collected soils contained low (1.10-1.70%) level of organic matter, 25.7% soils retained it at medium level (1.71-2.40) and 5.7% soils at very low level (<1.0%). All the tested soils appeared to be deficient (< 0.12%) in nitrogen content. 68.6% soil samples had the low level of available P while only 8.6% retained it an optimum amount. About 80% of the tested soils contained low level of available S (7.9- 14.7 mg kg -1) although coastal regions soils hold higher amount of available S. High CEC (20-38 cmol kg-1) was found in clay rich soils of AEZ 10, 11, 12, and 13. Study revealed that 40% of the collected soils were very low, 31.4% were low, 8.6% each of medium and optimum, and 11.4% contained high level of exchangeable K. The calcareous soils (AEZ 10, 11, 12 and 13) contained very high level of Ca. Non calcareous soils also showed fairly good level of Ca content except AEZ 1, 3, 23 and 29. Sandy textured soils of greater Dinajpur, Rangpur, Moulvibazar showed lower level of exchangeable Mg. About 86% of the tested soils had the lower (< 2%) potassium saturation percentage (KSP), which needs K application for sustainable crop production. Estimate showed that 44% variability for CEC may be attributed by clay content and the relationship was significant (p = 0.05). Again, 50.4 and 65.6% variability in exchangeable K and Mg, respectively may be governed by clay content of the soils, while such relationship for Ca was non-significant. CEC may contribute 62.2, 92.3 and 83.9% variability for exchangeable K, Ca and Mg content in soils, respectively. The fertility status of most of the studied soils (except AEZ 10, 12, 13 and to some extent 11) appeared to be low to very low, which demand judicious management in order to achieve food security and to conserve the soil fertility.Bangladesh J. Agril. Res. 41(4): 735-757, December 2016

scholarly journals Effect of Botanical Pesticides on Soil Fertility of Coffee-Orchards

2009 ◽  
Vol 9 ◽  
pp. 16-22 ◽  
Author(s):  
Bhanu B. Panthi ◽  
Bhupendra Devkota ◽  
Jyoti U. Devkota
Keyword(s):  
Organic Matter ◽  
Soil Fertility ◽  
Soil Nutrients ◽  
Soil Texture ◽  
Insect Pests ◽  
Clay Content ◽  
High Positive Correlation ◽  
Botanical Pesticides ◽  
Agriculture And Environment ◽  
Commercial Crop

Coffee (Coffea arabica; Rubiaceae) is a potential and emerging commercial crop. Coffee is planted in the midhills of Nepal (800 to 1250 meter above mean sea level) in Gulmi and Lalitpur districts. To control the major insect pests of coffee plant, locally prepared ‘jaibik bishadi’ (botanical pesticides) are used as alternatives of the synthetic insecticides. This study was undertaken to see the contribution of ‘jaibik bishadi’ in the fertility of the coffee orchards soil, for which soil samples from botanicals used and not used coffee orchards were collected to see the level of soil characteristics and soil nutrients such as soil texture, organic matter, soil nutrients (phosphorous and potassium). There was some difference in the soil texture of topsoil, but no difference could be seen in sand, silt and clay content of the subsoils from botanical used and not used orchards. The pH was significantly different between botanical used and not used soils, but such difference could not be observed between the topsoil and subsoil from the same sites. Jaibik bishadi used to control the coffee pests significantly contributed in the soil fertility, which could be seen in high positive correlation (r=0.9886) between organic matter and nitrogen in the soil.Keywords: Coffee, jaibik bishadi, topsoil, subsoil, soil fertilityThe Journal of Agriculture and Environment Vol:9, Jun.2008 page: 16-22

scholarly journals Performance of Ornamental Plants in Alternative Organic Growing Media Amended with Increasing Rates of Expanded Shale

2010 ◽  
Vol 20 (3) ◽  
pp. 594-602 ◽  
Author(s):  
John J. Sloan ◽  
Raul I. Cabrera ◽  
Peter A.Y. Ampim ◽  
Steve A. George ◽  
Wayne A. Mackay
Keyword(s):  
Organic Matter ◽  
Plant Growth ◽  
Plant Tissue ◽  
Biomass Yield ◽  
Organic Materials ◽  
Total Biomass ◽  
Light Weight ◽  
Growing Media ◽  
Micronutrient Uptake ◽  
Expanded Shale

Organic and inorganic amendments are often used to improve chemical and physical properties of soils. The objective of this study was to determine how the inclusion of light-weight expanded shale in various organic matter blends would affect plant performance. Four basic blends of organic growing media were prepared using traditional or alternative organic materials: 1) 75% pine bark (PB) + 25% sphagnum peatmoss (PM), 2) 50% PB + 50% wastewater biosolids (BS), 3) 100% municipal yard waste compost (compost), and 4) 65% PB + 35% cottonseed hulls (CH). Light-weight expanded shale was then blended with each of these mixtures at rates of 0%, 15%, 30%, and 60% (v/v). Vinca (Catharanthus roseus), verbena (Verbena hybrida), and shantung maple (Acer truncatum) were planted into the growing media after they were transferred into greenhouse pots. Vinca growth was monitored for 3 months before harvesting aboveground plant tissue to determine total biomass yield and elemental composition. Verbena growth was monitored for 6 months, during which time aboveground plant tissue was harvested twice to determine total biomass yield. Additionally, aboveground vinca plant tissue was analyzed for nutrients and heavy metal concentrations. In the absence of expanded shale, verbena and shantung maple trees produced more aboveground biomass in the 50-PB/50-BS blends, whereas vinca grew more biomass in the pure compost blends. Inclusion of expanded shale in the various organic matter blends generally had a negative effect on plant growth, with the exception of shantung maple growth in the 65-PB/35-CH blend. Reduced plant growth was probably due to a lower concentration of nutrients in the growing media. Macro- and micronutrient uptake was generally reduced by addition of expanded shale to the organic growing media. Results suggest that organic materials that have been stabilized through prior decomposition, such as compost or PM, are safe and reliable growing media, but expanded shale offers few benefits to a container growing medium except in cases where additional porosity is needed.

scholarly journals Review on Effects of Sowing Methods and Types of Inorganic Fertilizers on Growth Yield and Yield Component of TEFF [Eragrostis TEF (ZUCC.)

2021 ◽  
Vol 1 (3) ◽  
pp. 229-236
Author(s):  
Damte Balcha Gadana
Keyword(s):  
Soil Fertility ◽  
Yield Components ◽  
Growth Yield ◽  
Yield Component ◽  
Growth And Yield ◽  
Eragrostis Tef ◽  
Total Biomass ◽  
Inorganic Fertilizers ◽  
Biomass Yields ◽  
Planting Method

Most farmers’ practices broadcast sowing methods and productivity is less. Soil fertility maintenance is a major concern in tropical Africa which needs to tackle soil fertility depletion as a fundamental constraint. Similarly, the traditional way of planting tef reduces the amount of grain production, promotes competition for inputs, and causes severe lodging. This paper aimed to review the interaction effects between seed sowing methods and different types of inorganic fertilizers on the growth and yield of teff. In Ethiopia, recent research indicates planting method (row planting and broadcasting) affects the yield and yield components of teff. The review indicates the yield components include heading and maturity, plant height, first growth rate, number of tiller and panicle, thousand seed weight, grain, straw, and total biomass yields and harvest index high in Method of Row sowing compared to broadcast in Ethiopia but Days to emergence and panicle length were more affected by broadcasting. In economical acceptance, Row sowing was found to be economically acceptable with more income from grain yield than broadcasting.

scholarly journals Environmental inspection agro tech – guarantee sustainable development agricultural systems

2012 ◽  
pp. 41-42
Author(s):  
Natalia Makarenko ◽  
Valeria Bondor ◽  
Volodymur Makarenko
Keyword(s):  
Sustainable Development ◽  
Soil Fertility ◽  
Human Health ◽  
Crop Productivity ◽  
Adverse Impact ◽  
Agricultural Systems ◽  
Soil Activity

Shown the expediency of the environmental expertise technologies of growing crops in terms of impact on soil fertility, crop phytosanitary status, quality, chemicals migration, biological soil activity, crop productivity, which ensure avoidance of adverse impact on the environment and human health.

scholarly journals Responses of weed community, soil nutrients, and microbes to different weed management practices in a fallow field in Northern China

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7650 ◽  
Author(s):  
Xian Gu ◽  
Yu Cen ◽  
Liyue Guo ◽  
Caihong Li ◽  
Han Yuan ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Soil Nutrients ◽  
Seed Bank ◽  
Weed Management ◽  
Seed Banks ◽  
Total Biomass ◽  
Weed Seed ◽  
Soil Biodiversity ◽  
Deep Tillage ◽  
Positive Effects

The long-term use of herbicides to remove weeds in fallow croplands can impair soil biodiversity, affect the quality of agricultural products, and threaten human health. Consequently, the identification of methods that can effectively limit the weed seed bank and maintain fallow soil fertility without causing soil pollution for the next planting is a critical task. In this study, four weeding treatments were established based on different degrees of disturbance to the topsoil: natural fallow (N), physical clearance (C), deep tillage (D), and sprayed herbicide (H). The changes in the soil weed seed banks, soil nutrients, and soil microbial biomass were carefully investigated. During the fallow period, the C treatment decreased the annual and biennial weed seed bank by 34% against pretreatment, whereas the H treatment did not effectively reduce the weed seed bank. The D treatment had positive effects on the soil fertility, increasing the available nitrogen 108% over that found in the N soil. In addition, a pre-winter deep tillage interfered with the rhizome propagation of perennial weeds. The total biomass of soil bacterial, fungal, and actinomycete in H treatment was the lowest among the four treatments. The biomass of arbuscular mycorrhizal fungi in the N treatment was respectively 42%, 35%, and 91%, higher than that in the C, D, and H treatments. An ecological weeding strategy was proposed based on our findings, which called for exhausting seed banks, blocking seed transmission, and taking advantage of natural opportunities to prevent weed growth for fallow lands. This study could provide a theoretical basis for weed management in fallow fields and organic farming systems.

scholarly journals Fertilidade do solo como indicador do efeito de borda em fragmento florestal, Vitória da Conquista, Bahia

2016 ◽  
Vol 11 (4) ◽  
pp. 185
Author(s):  
Danilo Brito Novais ◽  
Joilson Silva Ferreira ◽  
Patrícia Anjos Bittencourt Barreto
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Soil Fertility ◽  
Edge Effect ◽  
Base Saturation ◽  
Forest Fragment ◽  
Chemical Attributes ◽  
The One ◽  
Composite Samples

Com a expansão da agricultura as florestas têm sido fragmentadas, modificando a dinâmica dos seus processos refletindo na fertilidade do solo. Esse estudo teve como objetivo avaliar o efeito de borda na fertilidade do solo em um fragmento florestal na região Sudoeste da Bahia. Para isso a área foi dividida em faixas verticais iniciando 50 metros após a borda, adentrando até 300 metros no fragmento. Em cada uma das faixas foram tomadas 3 amostras compostas nas profundidades de 0-5, 5-10, 10-20 cm. Analisando os atributos químico e calculando a soma de bases, CTC a pH7 e a saturação por bases (V%). Também foram quantificados os teores de carbono orgânico (COT) nas áreas de estudo. Foram observadas diferenças na fertilidade do solo da borda para o interior do fragmento.  Verificou-se que os atributos Ca2+, H++Al3+, S, T, COT foram os mais sensíveis em relação ao efeito de borda. A área semi-interna (SI) distando 150-200 metros, de maneira geral foi a que apresentou os maiores valores de fertilidade do solo, possivelmente devido aos maiores teores de matéria orgânica acumulada.  Soil fertility as edge effect indicator in a forest fragment, Vitória da Conquista, BahiaAbstract: With the expansion of agriculture forests have been fragmented, changing the dynamics of their processes reflecting soil fertility. This study aimed to evaluate the edge effect on soil fertility in a forest fragment in the Southwest Bahia region. For this area was divided into vertical strips starting 50 meters after the border, entering up to 300 meters in the fragment. In each of the tracks were taken 3 composite samples at depths of 0-5, 5-10, 10-20 cm. Analyzing the chemical attributes and calculating the sum of bases, CTC at pH 7 and base saturation (V%). Also the organic carbon levels were quantified (COT) in the study areas. Differences were observed at the edge of soil fertility into the fragment. It was found that attributes, Ca2+, H++Al3+, S, T, COT were the most sensitive in relation to the edge effect. The semi-internal area (SI) 150-200 meters distant in general was the one with the highest soil fertility values, possibly due to higher levels of accumulated organic matter.

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