Nitrogen and phosphorus resorption in a neotropical rain forest of a
... Abstract: In tropical forests with nutrient-rich soil tree’s nutrient resorption from senesced leaves has not always 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 f ...
... Abstract: In tropical forests with nutrient-rich soil tree’s nutrient resorption from senesced leaves has not always 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 f ...
Agricultural and Environmental Applications of Biochar: Advances
... concerns around soil and water quality, greenhouse gas emissions, and waste management. But there are still technological hurdles and socio-economic challenges, in part because the benefits of biochar materials remain inadequately defined and quantified. The Soil Science Society of America promotes ...
... concerns around soil and water quality, greenhouse gas emissions, and waste management. But there are still technological hurdles and socio-economic challenges, in part because the benefits of biochar materials remain inadequately defined and quantified. The Soil Science Society of America promotes ...
Native Plants for Acidic Soils
... stormwater as the valuable natural resource it is. We encourage measures to manage stormwater in ways that preserve or mimic natural infiltration or storage methods, thus allowing the rain to slowly reach our streams or ground water table. This prevents damage from erosion, sedimentation, sewer over ...
... stormwater as the valuable natural resource it is. We encourage measures to manage stormwater in ways that preserve or mimic natural infiltration or storage methods, thus allowing the rain to slowly reach our streams or ground water table. This prevents damage from erosion, sedimentation, sewer over ...
A European morpho-functional classification of humus forms
... At the end of the first meeting of the Humus group (Trento, Italy, 2003), after numerous field tests and discussions, the members of the group agreed on a very important “principle of classification”: the classification process has to take into consideration only references (objects observable in th ...
... At the end of the first meeting of the Humus group (Trento, Italy, 2003), after numerous field tests and discussions, the members of the group agreed on a very important “principle of classification”: the classification process has to take into consideration only references (objects observable in th ...
Unit 1 Review Sheet Define ecology Contrast preservationist and
... 80. Contrast bottom up and top down population control. 81. Describe the shape of a logistic curve. 82. Describe the shape of an exponential curve. 83. What are some factors that lead to the destruction of tropical rain forests? 84. Which terrestrial and aquatic ecosystem has the highest NPP? 85. W ...
... 80. Contrast bottom up and top down population control. 81. Describe the shape of a logistic curve. 82. Describe the shape of an exponential curve. 83. What are some factors that lead to the destruction of tropical rain forests? 84. Which terrestrial and aquatic ecosystem has the highest NPP? 85. W ...
Soil Heterogeneity Effects on Tallgrass Prairie Community
... randomly assigned to heterogeneity treatments of control, soil depth heterogeneity, soil nutrient heterogeneity, or maximum heterogeneity containing both the depth and nutrient heterogeneity treatments (Fig. 1). The soil depth and nutrient manipulations were assigned to strips within each plot. The ...
... randomly assigned to heterogeneity treatments of control, soil depth heterogeneity, soil nutrient heterogeneity, or maximum heterogeneity containing both the depth and nutrient heterogeneity treatments (Fig. 1). The soil depth and nutrient manipulations were assigned to strips within each plot. The ...
Uncertainty and sensitivity analysis of runoff and sediment yield in a
... Since infiltration excess is the primary runoff generating mechanism in Hortonian catchments, the importance of the infiltration process cannot be understated, especially during moderate to low intensity storms. KINEROS2 describes the infiltration process by solving the Parlange et al. (1982) equati ...
... Since infiltration excess is the primary runoff generating mechanism in Hortonian catchments, the importance of the infiltration process cannot be understated, especially during moderate to low intensity storms. KINEROS2 describes the infiltration process by solving the Parlange et al. (1982) equati ...
Capítol 3
... to a dilution effect by increased structural or non-structural carbon. Therefore, in contrast to many experimental studies of CO 2 enrichment, mainly conducted for short-periods, there were no greater concentrations of phenolics, and, as in many of these studies, there were neither greater concentra ...
... to a dilution effect by increased structural or non-structural carbon. Therefore, in contrast to many experimental studies of CO 2 enrichment, mainly conducted for short-periods, there were no greater concentrations of phenolics, and, as in many of these studies, there were neither greater concentra ...
PR_ATG_at_Agritechnica_2015_EN
... wagons, cultivators, fast moving small agricultural trailers, wagons and trailers etc. Characterised by higher load capacity and working speeds, these tires also offer superior distribution of pressure on the soil surface. The high crown radius provides a maximum footprint area which adds to the flo ...
... wagons, cultivators, fast moving small agricultural trailers, wagons and trailers etc. Characterised by higher load capacity and working speeds, these tires also offer superior distribution of pressure on the soil surface. The high crown radius provides a maximum footprint area which adds to the flo ...
Plant ectoparasitic nematodes prefer roots without their microbial
... Studying how the abundance of root-feeding nematodes is controlled in natural ecosystems may help to improve the biological control of nematodes in agroecosystems (van der Putten et al. 2006). In coastal foredunes, root-feeding nematodes are suppressed in a species-specific way. For example, tempora ...
... Studying how the abundance of root-feeding nematodes is controlled in natural ecosystems may help to improve the biological control of nematodes in agroecosystems (van der Putten et al. 2006). In coastal foredunes, root-feeding nematodes are suppressed in a species-specific way. For example, tempora ...
ecological sanitation in malawi
... Compost from shallow pit composting toilets or urine diverting toilets can be used to aid the growth of vegetables. Fertile compost can be made in shallow pits by adding a mix of soil and wood ash regularly to the excreta. It can also be made by combining faeces with top soil and wood ash in uri ...
... Compost from shallow pit composting toilets or urine diverting toilets can be used to aid the growth of vegetables. Fertile compost can be made in shallow pits by adding a mix of soil and wood ash regularly to the excreta. It can also be made by combining faeces with top soil and wood ash in uri ...
Peas, vining, processed 2016 (Category 2)
... is experienced every year, a monitoring system can be used to establish the need for treatment. The system comprises five traps which should be sited in mid-February on the edge of the previous year’s pea crop. If weevil catches are high close to the time of crop emergence, then spraying may be just ...
... is experienced every year, a monitoring system can be used to establish the need for treatment. The system comprises five traps which should be sited in mid-February on the edge of the previous year’s pea crop. If weevil catches are high close to the time of crop emergence, then spraying may be just ...
Monitoring soil erosion in South Africa at a regional scale
... overland flow which protect the surface against the impact of rain. Runoff and erosion also tend to increase with increasing slope length. Slope length, together with the slope form, determines the severity of erosion through the type of erosion that will dominate, and the probability for deposition ...
... overland flow which protect the surface against the impact of rain. Runoff and erosion also tend to increase with increasing slope length. Slope length, together with the slope form, determines the severity of erosion through the type of erosion that will dominate, and the probability for deposition ...
Document
... pedo-geological formation resulting by diagenesis and not by simply sedimentation (ˮloess was formed not depositedˮ, Florea, 2010). This formation also results in present day by diagenesis of the integrated deposited dust in the soil (aeolian accretion) - continuously - , so that the previous deposi ...
... pedo-geological formation resulting by diagenesis and not by simply sedimentation (ˮloess was formed not depositedˮ, Florea, 2010). This formation also results in present day by diagenesis of the integrated deposited dust in the soil (aeolian accretion) - continuously - , so that the previous deposi ...
Resource partitioning for soil phosphorus: a hypothesis
... growing on strongly weathered soils contain large numbers of plant species coexisting in apparently similar environmental niches (Wright 2002). The model could also explain in part the distribution of plants across gradients of phosphorus availability. In a relatively phosphorus-rich soil with abund ...
... growing on strongly weathered soils contain large numbers of plant species coexisting in apparently similar environmental niches (Wright 2002). The model could also explain in part the distribution of plants across gradients of phosphorus availability. In a relatively phosphorus-rich soil with abund ...
Mycorrhizal fungal establishment in agricultural soils: factors
... will be better able to reach conspecific strains. This will increase the volume of soil and plant ...
... will be better able to reach conspecific strains. This will increase the volume of soil and plant ...
EFFECT OF SOIL VARIABILITY ON THE BEARING CAPACITY OF
... (2005) and Makrodimopoulos and Martin (2005) using numerical finite element limit analysis. Davis and Booker (1973) compared the rigorous solutions, which were obtained using the theory of plasticity for a rigid plastic body, with the approximate values suggested by Terzaghi (1943), and the comparis ...
... (2005) and Makrodimopoulos and Martin (2005) using numerical finite element limit analysis. Davis and Booker (1973) compared the rigorous solutions, which were obtained using the theory of plasticity for a rigid plastic body, with the approximate values suggested by Terzaghi (1943), and the comparis ...
Appendix 6 - Potato seed system development WA
... potato late blight, bacterial wilt and leafminer (Liriomyza huidobrensis). In addition to disease freedom, high quality seed potatoes need to be free from bruising. Bruising and mechanical damage caused during harvesting increases tuber susceptibility to breakdown and can lead to rots in storage and ...
... potato late blight, bacterial wilt and leafminer (Liriomyza huidobrensis). In addition to disease freedom, high quality seed potatoes need to be free from bruising. Bruising and mechanical damage caused during harvesting increases tuber susceptibility to breakdown and can lead to rots in storage and ...
2012 Specimen Paper 1
... The graph compares the relationship between yield and the amount of nitrogen fertiliser added to the soil. ...
... The graph compares the relationship between yield and the amount of nitrogen fertiliser added to the soil. ...
Response of Sagebrush Steppe Species to Elevated
... in water-use efficiency than sagebrush or squirreltail at elevated CO2. Since water is often limiting in rangelands, small increases in wateruse efficiency of seedlings may cause relatively large changes in seedling survival and competition between species. Therefore, alterations in water-use effici ...
... in water-use efficiency than sagebrush or squirreltail at elevated CO2. Since water is often limiting in rangelands, small increases in wateruse efficiency of seedlings may cause relatively large changes in seedling survival and competition between species. Therefore, alterations in water-use effici ...
Impacts of feral horses on a desert environment | SpringerLink
... agent of erosion when it prepares the soil for erosion through other geomorphic processes; for example, when trampling removes vegetative cover or increases soil bulk density (i.e., causes soil compaction). Soil compaction is problematic because it increases soil strength, reduces both rainwater inf ...
... agent of erosion when it prepares the soil for erosion through other geomorphic processes; for example, when trampling removes vegetative cover or increases soil bulk density (i.e., causes soil compaction). Soil compaction is problematic because it increases soil strength, reduces both rainwater inf ...
Revista de Biología Tropical ISSN 0034
... internal nutrient sinks in plants, or to some combination of these two. Chapin (1980) pointed out that there was insufficient evidence to support any particular relationship between nutrient resorption and soil fertility. There are studies that demonstrate that nutrient resorption efficiency is hig ...
... internal nutrient sinks in plants, or to some combination of these two. Chapin (1980) pointed out that there was insufficient evidence to support any particular relationship between nutrient resorption and soil fertility. There are studies that demonstrate that nutrient resorption efficiency is hig ...
The influence of biotic interactions on soil biodiversity
... interactions such as facilitation in structuring ecological communities (Callaway & Walker 1997). Facilitative interactions in soils have most frequently been identified for soil fungi and the fungal-based energy channel. For example, during decomposition of fresh dead plant material, those fungal s ...
... interactions such as facilitation in structuring ecological communities (Callaway & Walker 1997). Facilitative interactions in soils have most frequently been identified for soil fungi and the fungal-based energy channel. For example, during decomposition of fresh dead plant material, those fungal s ...
No-till farming
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No-till farming (also called zero tillage or direct drilling) is a way of growing crops or pasture from year to year without disturbing the soil through tillage. No-till is an agricultural technique which increases the amount of water that infiltrates into the soil and increases organic matter retention and cycling of nutrients in the soil. In many agricultural regions it can reduce or eliminate soil erosion. It increases the amount and variety of life in and on the soil, including disease-causing organisms and disease suppression organisms. The most powerful benefit of no-tillage is improvement in soil biological fertility, making soils more resilient. Farm operations are made much more efficient, particularly improved time of sowing and better trafficability of farm operations.