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Insect population dynamics meets ecosystem ecology: effects of
... wound-induced increases in foliar phenolics (Findlay et al., 1996), root mortality (Ruess et al., 1998) and community-wide changes in the relative abundance of plant species or genotypes that vary in their litter quality (Pastor et al., 1993; Kielland et al., 1997; Uriarte, 2000). Fifth, herbivore-m ...
... wound-induced increases in foliar phenolics (Findlay et al., 1996), root mortality (Ruess et al., 1998) and community-wide changes in the relative abundance of plant species or genotypes that vary in their litter quality (Pastor et al., 1993; Kielland et al., 1997; Uriarte, 2000). Fifth, herbivore-m ...
The Effect of Nitrate Levels on Algae Growth in the Soil
... based on the amount of Leersia virginica present; plot 1 contained no plant life and served as the positive control; plot 2 contained plant life but 0% Leersia virginica; plot 3 contained 50% Leersia virginica; and the plot 4 contained 100% Leersia virginica. Five standard sized glass microscope sli ...
... based on the amount of Leersia virginica present; plot 1 contained no plant life and served as the positive control; plot 2 contained plant life but 0% Leersia virginica; plot 3 contained 50% Leersia virginica; and the plot 4 contained 100% Leersia virginica. Five standard sized glass microscope sli ...
Does organic farming reduce environmental impacts?
... describe the level of soil quality. SOM was chosen because it has a positive impact on many other soil quality aspects, such as structure, erosion control, water retention and long term productivity and, therefore, it is a sufficient indicator for describing the overall level of soil quality (Shephe ...
... describe the level of soil quality. SOM was chosen because it has a positive impact on many other soil quality aspects, such as structure, erosion control, water retention and long term productivity and, therefore, it is a sufficient indicator for describing the overall level of soil quality (Shephe ...
General enquiries on this form should be made to:
... 8. The trait-based filters also varied in their reliability. The dispersal filter was considered reliable however a number of CSM indicators did not have sufficient trait data to be attributed an index. The grazing index was unsatisfactory and different analytical approaches are required. 9. Applica ...
... 8. The trait-based filters also varied in their reliability. The dispersal filter was considered reliable however a number of CSM indicators did not have sufficient trait data to be attributed an index. The grazing index was unsatisfactory and different analytical approaches are required. 9. Applica ...
Effects of plant diversity, N fertilization, and elevated
... transformation. The distributions of soil ammonium concentrations and N transformation rates contained outliers, i.e., observations that extended beyond the upper or lower quartile by a value more than 1.5 times the interquartile range, but outliers accounted for less than 5% of observations in each ...
... transformation. The distributions of soil ammonium concentrations and N transformation rates contained outliers, i.e., observations that extended beyond the upper or lower quartile by a value more than 1.5 times the interquartile range, but outliers accounted for less than 5% of observations in each ...
Click here to the petition
... That the organic carbon content in the district ranges from 0.14 to 3.76%. That the 43.8% of the areas in the district have high organic carbon content. That the medium and low organic carbon content constitutes 28.7% and 25.3% of the area respectively. That the available nitrogen content in the sur ...
... That the organic carbon content in the district ranges from 0.14 to 3.76%. That the 43.8% of the areas in the district have high organic carbon content. That the medium and low organic carbon content constitutes 28.7% and 25.3% of the area respectively. That the available nitrogen content in the sur ...
Biochar in Agricultural Systems
... Most people are familiar with charcoal, which is produced by combusting wood in an oxygen-depleted environment and then used as a heating fuel. Biochar is produced in a similar fashion, but the term “biochar” is used primarily when the end use is a soil amendment. As with charcoal, biochar is a blac ...
... Most people are familiar with charcoal, which is produced by combusting wood in an oxygen-depleted environment and then used as a heating fuel. Biochar is produced in a similar fashion, but the term “biochar” is used primarily when the end use is a soil amendment. As with charcoal, biochar is a blac ...
Plant nitrogen-use strategy as a driver of
... for instance resulting from direct competition or stimulation. Model 1 was used to test the first hypothesis (a positive rhizosphere effect) and was fitted to both rhizosphere and bulk soil data, to assess the difference between them. Model 2 was fitted to rhizosphere data only, assessing both the s ...
... for instance resulting from direct competition or stimulation. Model 1 was used to test the first hypothesis (a positive rhizosphere effect) and was fitted to both rhizosphere and bulk soil data, to assess the difference between them. Model 2 was fitted to rhizosphere data only, assessing both the s ...
Soil health in agricultural systems
... and may only impact on agricultural production and the wider environment over years. For this reason, research has been directed to devising measures of the health of soil, which could be used to monitor its condition and inform its management so that degradation is avoided. This has led to debate a ...
... and may only impact on agricultural production and the wider environment over years. For this reason, research has been directed to devising measures of the health of soil, which could be used to monitor its condition and inform its management so that degradation is avoided. This has led to debate a ...
Soil biology and agriculture in the tropics
... adjacent open areas, confirming the widely established pattern of resource islands in arid lands. Removing the shrubs did not affect most of the improved soil parameters in the long dry season occurring after shrub removal, except for water content. These positive effects notwithstanding, over a 1-y ...
... adjacent open areas, confirming the widely established pattern of resource islands in arid lands. Removing the shrubs did not affect most of the improved soil parameters in the long dry season occurring after shrub removal, except for water content. These positive effects notwithstanding, over a 1-y ...
Interactions between mesofauna and microorganisms
... means by which animals find their preferred food before tasting or touching it. Consequences of ...
... means by which animals find their preferred food before tasting or touching it. Consequences of ...
Plant–soil feedbacks: connecting ecosystem ecology and evolution
... for feedback loops to exist between plants, microbial communities and soil environments, understanding the genetic basis of these interactions is essential for PSF research to begin incorporating and demonstrating evolutionary concepts. Genetic variation in plants can affect soil microbial communitie ...
... for feedback loops to exist between plants, microbial communities and soil environments, understanding the genetic basis of these interactions is essential for PSF research to begin incorporating and demonstrating evolutionary concepts. Genetic variation in plants can affect soil microbial communitie ...
Ch 5 Lecture Notes
... thinking of the exhaustion of our natural resources, and especially of soil erosion and these are perhaps more dangerous still, because once we begin to feel their repercussions it will be too late." (p144 of The Dalai Lama's Little Book of Inner Peace: 2002, Element Books, London) ...
... thinking of the exhaustion of our natural resources, and especially of soil erosion and these are perhaps more dangerous still, because once we begin to feel their repercussions it will be too late." (p144 of The Dalai Lama's Little Book of Inner Peace: 2002, Element Books, London) ...
chickpea nitrogen fixation increases production of subsequent
... The soil NO3-N values were generally very low (Table 3). These results have shown that there was no significant difference in soil nitrate content of all the plots in first yea. However, in the second and third years the NO3-N values were generally higher in treatments where chickpea was grown in ro ...
... The soil NO3-N values were generally very low (Table 3). These results have shown that there was no significant difference in soil nitrate content of all the plots in first yea. However, in the second and third years the NO3-N values were generally higher in treatments where chickpea was grown in ro ...
Positive Plant Diversity-Soil Stability Relationships are
... The interplay between organisms and their physicchemical environment plays a key role in both evolution and ecosystem functioning (Loreau, 2010), and plants can affect soil processes either directly or indirectly (Loreau et al., 2001; Sylvain and Wall, 2011). Here, we conducted this study to examine ...
... The interplay between organisms and their physicchemical environment plays a key role in both evolution and ecosystem functioning (Loreau, 2010), and plants can affect soil processes either directly or indirectly (Loreau et al., 2001; Sylvain and Wall, 2011). Here, we conducted this study to examine ...
Full-Text PDF
... fresh cut flowers, vegetables and fruits has attracted several Sub Saharan African economies in quest for unconventional export commodities [1,2]. The decline of traditional cash crops (coffee, tea and tobacco) due to changes in market demands, low return prices [3,4] and decreasing land resources f ...
... fresh cut flowers, vegetables and fruits has attracted several Sub Saharan African economies in quest for unconventional export commodities [1,2]. The decline of traditional cash crops (coffee, tea and tobacco) due to changes in market demands, low return prices [3,4] and decreasing land resources f ...
Hierarchy of responses to resource pulses in arid and semi
... biologically relevant levels (pulse duration). Both characteristics describe the quantity “pulse size”, i.e. larger pulse events usually affect greater soil volumes and last longer. This simple definition, however, already illustrates that precipitation amount is only one of many factors that can af ...
... biologically relevant levels (pulse duration). Both characteristics describe the quantity “pulse size”, i.e. larger pulse events usually affect greater soil volumes and last longer. This simple definition, however, already illustrates that precipitation amount is only one of many factors that can af ...
Nitrogen and phosphorus resorption in a neotropical rain forest of a
... been observed to be low. Perhaps this lack of consistence is partly owing to the nutrient resorption methods used. The aim of the study was to analyse N and P resorption proficiency from tropical rain forest trees in a nutrientrich soil. It was hypothesised that trees would exhibit low nutrient reso ...
... been observed to be low. Perhaps this lack of consistence is partly owing to the nutrient resorption methods used. The aim of the study was to analyse N and P resorption proficiency from tropical rain forest trees in a nutrientrich soil. It was hypothesised that trees would exhibit low nutrient reso ...
17 Ecological Approaches to Crop Domestication
... habitats available, to supply their crops with limiting resources, such as water, nitrogen, or mineral nutrients, and to protect their crops from herbivores and pathogens and from disturbances such as fire. One way of achieving these goals is by managing crop phenology. Farmers can synchronize plant ...
... habitats available, to supply their crops with limiting resources, such as water, nitrogen, or mineral nutrients, and to protect their crops from herbivores and pathogens and from disturbances such as fire. One way of achieving these goals is by managing crop phenology. Farmers can synchronize plant ...
Quantifying the impact of land degradation on crop
... are severe especially for poorer societies that do not have the available means to compensate loss of land productivity (e.g. Rajashekhar Rao, 2015) and suffer from the created land scarcity, food insecurity, and damaged ecosystems. This also holds for sub-Saharan Africa where already in the late 19 ...
... are severe especially for poorer societies that do not have the available means to compensate loss of land productivity (e.g. Rajashekhar Rao, 2015) and suffer from the created land scarcity, food insecurity, and damaged ecosystems. This also holds for sub-Saharan Africa where already in the late 19 ...
Title (NOT ALL CAPITAL LETTERS)
... Land degradation and climate change undoubtedly affect the food security of the Eurasian region, Central Asia, and the entire world. Although the general trends are known, the devil is in the details. And they require both a study and a response. First of all, it is necessary to purposefully collect ...
... Land degradation and climate change undoubtedly affect the food security of the Eurasian region, Central Asia, and the entire world. Although the general trends are known, the devil is in the details. And they require both a study and a response. First of all, it is necessary to purposefully collect ...
515.pdf
... winter, streambanks were protected from cattle grazing in the exclosure. There was more total bank erosion in grazed areas compared to excluded areas during the grazing season. There were no differences in erosion losses based on vegetation types or for position on the meander bends. Over-winter ero ...
... winter, streambanks were protected from cattle grazing in the exclosure. There was more total bank erosion in grazed areas compared to excluded areas during the grazing season. There were no differences in erosion losses based on vegetation types or for position on the meander bends. Over-winter ero ...
Ecological Focus Area choices and their potential impacts on
... The literature shows that under the current EFA rules and conventional farming practices it is unlikely that most nitrogen-fixing crops grown on EFAs will provide significant benefits for biodiversity. The main exception to this being extensively managed nitrogen-fixing forage and green manure crops ...
... The literature shows that under the current EFA rules and conventional farming practices it is unlikely that most nitrogen-fixing crops grown on EFAs will provide significant benefits for biodiversity. The main exception to this being extensively managed nitrogen-fixing forage and green manure crops ...
2012 Specimen Paper 1
... Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included ...
... Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included ...
671.pdf
... a randomized block design in which we pooled annual data from individual shrubs of each species. Sampling year was the block factor, and the main effect was family (Asteraceae or Chenopodiaceae). To address hypothesis two, we analyzed NPROF data from two asters (C. nauseosus ssp. consimilis and C. v ...
... a randomized block design in which we pooled annual data from individual shrubs of each species. Sampling year was the block factor, and the main effect was family (Asteraceae or Chenopodiaceae). To address hypothesis two, we analyzed NPROF data from two asters (C. nauseosus ssp. consimilis and C. v ...
Crop rotation
![](https://en.wikipedia.org/wiki/Special:FilePath/Crops_Kansas_AST_20010624.jpg?width=300)
Crop rotation is the practice of growing a series of dissimilar/different types of crops in the same area in sequenced seasons.It also helps in reducing soil erosion and increases soil fertility and crop yield. Crop rotation gives various nutrients to the soil. A traditional element of crop rotation is the replenishment of nitrogen through the use of green manure in sequence with cereals and other crops. Crop rotation also mitigates the build-up of pathogens and pests that often occurs when one species is continuously cropped, and can also improve soil structure and fertility by alternating deep-rooted and shallow-rooted plants.Crop rotation is one component of polyculture.