Vernon, ME). Changes/Problems: How have the results been disseminated to communities of interest? The following are factors affecting decomposition of soil organic matters Temperature: Cold periods retard plant growth and OM decomposition. Nothing Reported 19, No. Publications, Progress 10/01/13 to 09/30/14OutputsTarget Audience: Two presentations were given at the 2014 Maine Vegetable and Fruit School, March 10 and 11, 2014 in Portland and Bangor Maine on compost use as a soil amendment to supply nitrogen. Although the native grassland site contained the highest amount of soil C, the sites were similar in total P. The largest extractable fraction at all sites was NaOH-extractable organic P (Po), and the quantity of Po (0.1M plus 0.5M extractions) did not differ significantly among the soils. Temperature: Cold periods retard plant growth and OM decomposition. Citation: The field study used a randomized complete block design with four replications to compare four compost treatments (all added at the rate of 300 kg total N ha-1 ) with unamended soil and an inorganic N treatment (110 kg N ha-1 ). Planted plots had higher soluble organic C and higher microbial biomass compared to bare plots. Nitrogen availability from compost in high tunnel tomato production. Type: We examined the effects of root growth on the CO2 flush in a field experiment. One graduate student is working on this project How have the results been disseminated to communities of interest? In addition to the composition of organic matter, nature and abundance of microorganisms in soil, the extent of C, N, P and K., moisture content of the soil and its temperature, PH, aeration, C: N ratio of plant residues and presence/absence of inhibitory substances (e.g. Factors Affecting Organic Matter Decomposition: (i) Moisture: When large quantities of O.M. Publications, National Institute of Food and Agriculture, 102 - Soil, Plant, Water, Nutrient Relationships, 403 - Waste Disposal, Recycling, and Reuse, Type: tannins) etc. What do you plan to do during the next reporting period to accomplish the goals?Another peer-reviewed journal article plus a presentation to the New England Fruit and Vegetable Conference in NH in December 2015. This study examined how land use change has altered soil chemistry compared to native vegetation, focusing specifically on P and C fractions. 2014 Compost for High Tunnel Tomato Production. The audience was primarily growers, scientists, and students. Because soil organic matter stores both nutrients and water, it is a key to soil quality in both agricultural and forested ecosystems. The factors are: 1. She developed her thesis proposal, conducted one summer of field research, and is now analyzing her data. Soil organic matter … Type of Vegetation 7. Factors affecting decomposition of organic matter. Moisture. Marshall, K.; Erich, M.S. Main factors affecting biogas production - an overview Romanian Biotechnological Letters, Vol. Maintenance. The organic matter, which influences the different physico-chemical factors like bulk density, pH, is the major soil property affecting litter decomposition (Cuevas and Medina 1986). Tomatoes were grown in Monmouth, ME during the summers of 2013 and 2014. In the laboratory study, all compost-amended soils had relatively high rates of CO2 release for the initial few days and then the rates declined. In the laboratory study, all compost-amended soils had relatively high rates of CO2 release for the initial few days and then the rates declined. In addition to the composition of organic matter, nature and abundance of microorganisms in soil, the extent of C, N, P and K., moisture content of the soil and its temperature, PH, aeration, C: N ratio of plant residues and presence/absence of inhibitory substances (e.g. Although surface soil (approximately the top 4 to 6 What Determines Soil Organic Matter Levels? Presentations were given at the Maine Vegetable and Fruit School in Portland and Bangor, Maine and at the American Societyof Horticultural Science meeting in Orlando, FL. Warm summers may permit plant growth and humus accumulation. Soil Science Society of America meeting, Tampa, FL. Perhaps the most significant factor in the rate of decomposition is temperature and environment. There are environmental friendly factors affected the microbial breakdown organic matter. ��4:b���бI��E���{��N�2"��&�O�������#�K�}H��q+�b|����h�=�4�xt S�P�f,�Z?�Ŋ�L3�|���8P~�GX�d,�vǗ:�#�m�B�̟�si�)�����K�b���/J�� w��H �[��:��. 24:147-158. Nothing Reported We examined commercially-available composts and their effects on soil N, plant N uptake, and tomato yield in HT cultivation. Another student's M.S. Nothing Reported Humus serves as a source of energy for the development of various groups of micro­organisms and as a result of decomposition of CO 2 , NH 3 and other products are given off. Temperature and moisture affect the rate of soil organic matter decomposition. Five factors affect both additions and losses. Sources of Soil Organic Matter 2. Intrinsic factors ... Campobasso CP, “Factors affecting decomposition and Diptera colonization.” Forensic Sci Int. N acre-1. Year Published: As anaerobic decomposition of organic matter is a reduction process, the final product is subject to some minor oxidation when applied to land. High yield agricultural systems, such as high tunnel (HT) vegetable production, require a large supply of soil nutrients, especially nitrogen (N). 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