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Showing 1 to 14 of 14 for “"plant available nitrogen"”.
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Drought Resistance Response of Tall Fescue Established in Disturbed Urban Soils Utilizing Biosolids
… N rate for the turfgrass was 224 kg of estimated plant available nitrogen (PAN) ha-1. Inorganic fertilizer was applied to supply annual P and K requirements prior to seeding in late summer, and the N was split into three application timings (September 2013, April 2014, and June 2014). Supplemental …
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Nitrogen Management and the Effects of Compost Tea on Organic Irish Potato and Sweet Corn
Supply and synchronization of plant-available nitrogen (N) to the soil is a major challenge for organic farmers, especially when growing crops in soils that are in transition from conventional to organic systems. This research evaluated the effects of site produced cover crops and application of …
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Tillage and cover cropping effects on soil properties and crop production
… matter (SOM), total carbon stocks (TCs), pH, plant available nitrogen (TIN, NO3-N and NH4-N), available phosphorus (P), and exchangeable potassium (K). Compared to winter fallows, crop yields and soil attributes under corn-soybean rotations that included CCs did not show any significant change …
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The microbial ecology of cow slurry in vermiculture beds
… stabilisation of the substrate and increased the plant-available nitrogen content. Specific nutritional interactions were observed between E. fetida and micro-organisms in sand/cellulose microcosms. The earthworms were found to be feeding directly upon the cells of certain micro-organisms. Other …
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Soil testing and plant analysis to optimize nitrogen management in manured cornfields
… is widely accepted as a method of recycling plant available nitrogen (N) within agricultural systems, but there is great need to improve the efficiency of this recycling. Soil testing and plant analysis are widely accepted as important tools for managing plant nutrients, but guidelines for …
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Use of Stable Isotopes to Trace the Fate of Applied Nitrogen in Forest Plantations to Evaluate Fertilizer Efficiency and Ecosystem Impacts
… (spring, summer) to: 1) compare fertilizer nitrogen (N) losses (see Chapter 2); 2) evaluate temporal N uptake patterns of loblolly pine (see Chapter 3); and 3) evaluate fertilizer N cycling and partitioning in a loblolly pine ecosystem (see Chapter 4). Chapter 2 results showed enhanced …
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Assessment of Exceptional Quality Biosolids for Urban Agriculture
… use. The objectives were: 1) to quantify plant available nitrogen (PAN) of new EQ biosolids in a greenhouse bioassay; 2) to quantify PAN of EQ biosolids applied to an urban degraded subsoil via tall fescue N fertilizer equivalency, and compare field results to laboratory tests; 3) to …
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Effects of Biosolids on Tall Fescue-Kentucky Bluegrass Sod Production and Soil Chemical and Physical Properties
… The biosolids products were applied at estimated plant available nitrogen (PAN) rates of 98 kg N ha-1 (0.5X), 196 kg N ha-1 (1.0X) and 294 kg N ha-1 (1.5X) for a tall fescue (Festuca arundinacea Schreb. \'Rebel Exeda\' \'Rebel IV\' and \'Justice\')/ Kentucky bluegrass (Poa pratensis L. …
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Effects of green manure cover crops on weed population, peal, millet and maize productivity under conservation agriculture in Liselo and Mashare Namibia
… 10 t ha-1 and P=0.9143 in season 1. The highest plant available nitrogen was produced by jack bean (900 ppm) and P=0.0000 at LRS. Maize grain and biomass yields were significantly P=0.0172affected by different rotations at LRS in season two with maize after maize monocropping attaining the least …
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Changes in Soil Nitrogen Following Biosolids Application to Loblolly Pine (Pinus Taeda L.) Forest in the Virginia Piedmont
… of biosolids as an alternative source of Nitrogen (N) is becoming a common silviculture practices on loblolly pine forest. However, little is known about how biosolids type, application rate, and timing affect forest floor and soil N availability in pine plantations. The objectives of this …
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Soil Amino Acids at Upper Tree Line, Montane and Lower Tree Line
<p>The classic view of the nitrogen cycle in soils is for plants to take up inorganic N in solution for N nutrition. More recent studies reveal plants can take up low molecular weight dissolved organic N such as amino acids directly from the soil. In ecosystems where the rate of microbial …
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Using Thermal Units to Predict Biomass Accumulation and Total Nitrogen Uptake for Cover Crops in Arkansas
… Cover cropping can improve soil health, increase plant-available nitrogen (N), provide surface residue to prevent erosional soil loss, increase water infiltration, and increase weed suppression. Cover crops growth can be predicted using thermal days or growing degree days [GDD] similar to …
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Restoring semi-arid lands with superabsorbent polymers under reduced precipitation and threat of Bromus tectorum invasion
… and promote establishment of a native plant community that is resilient to disturbance and resistant to invasion of B. tectorum. With their ability to absorb moisture when it is abundant and slowly release it over time, superabsorbent polymers (SAP) may increase overall soil moisture …
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High-throughput maize root phenotyping
The root system is important for plant adaptability to changing environments. Although the importance of the root system is well reported in the research literature there is still a considerable lack of knowledge with regard to the development of root systems per se, and how root system complexity …