Agricultural Nutrient Budget

2015 ◽  
pp. 61-74
Author(s):  
W. H. Garman
Keyword(s):  
Nutrient Budget

scholarly journals A new MONERIS in-Stream Retention Module to Account Nutrient Budget of a Temporary River in Cyprus

2014 ◽  
Vol 28 (10) ◽  
pp. 2917-2935 ◽  
Author(s):  
O. Tzoraki ◽  
D. Cooper ◽  
G. Dörflinger ◽  
P. Panagos
Keyword(s):  
Nutrient Budget ◽  
Temporary River

Nutrients budget and effluents characteristics in polyculture of scampi (Macrobrachium rosenbergii) and Indian major carps ponds using organic inputs

2012 ◽  
Vol 66 (7) ◽  
pp. 1540-1548 ◽  
Author(s):  
Subhendu Adhikari ◽  
Bharat Chandra Sahu ◽  
Lambodar Dey
Keyword(s):  
Macrobrachium Rosenbergii ◽  
Nutrient Budget ◽  
Catla Catla ◽  
Average Weight ◽  
Cow Dung ◽  
Nutrient Loads ◽  
Feed Conversion ◽  
Indian Major Carps ◽  
Main Input ◽  
Major Carps

Experiments were conducted for the study of nutrient budget in farmers' ponds (0.4–0.6 ha) in Orissa, India, at stocking densities of 0.30–0.38/m2 for scampi (Macrobrachium rosenbergii) and 0.60–0.70/m2 for Indian major carps (Catla catla, Labeo rohita and Cirrhinus mrigala). The average initial body weights of scampi and the major carps were 0.02 and 8–10 g, respectively. The culture period was 272–292 days. Feed was the main input. The FCR (feed conversion ratio) varied from 1.78 to 1.83. Feed and cow dung were applied to these ponds as organic inputs. At harvest time, the average weight of scampi and carps varied from 73 to 92 g and from 718 to 820 g, respectively. Among all the inputs, feed alone accounted for 97.60% total nitrogen (N), 97.90% total phosphorus (P) and 94.72% total organic carbon (OC), respectively. The harvest of scampi and carps accounted for recovery of 52.45% N, 19.43% P and 18.12% OC, respectively. N, P and OC accumulated in sediment were 38.31, 71.40 and 69.50%, respectively. The median nutrient loads in the fish pond effluents were equivalent to 0.58 kg of inorganic N, 0.135 kg of P and 8.83 kg of total OC per ton of Indian major carps and scampi production.

Nutrient Budget in the Seasonal Wetland of the Okavango Delta, Botswana

2006 ◽  
Vol 14 (3) ◽  
pp. 253-267 ◽  
Author(s):  
Martin Krah ◽  
Terence S. McCarthy ◽  
Philippa Huntsman-Mapila ◽  
Piotr Wolski ◽  
Harold Annegarn ◽  
...  
Keyword(s):  
Nutrient Budget ◽  
Okavango Delta ◽  
Seasonal Wetland

scholarly journals Long-Term Ecosystem Nutrient Pool Status for Aspen Forest Harvest Simulations on Glacial Till and Sandy Outwash Soils

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1556
Author(s):  
Robert P. Richard ◽  
Evan S. Kane ◽  
Dustin R. Bronson ◽  
Randall K. Kolka
Keyword(s):  
Nutrient Retention ◽  
Nutrient Budget ◽  
Glacial Till ◽  
Soil Survey ◽  
Low Fertility ◽  
Nutrient Pools ◽  
Nutrient Pool ◽  
Rotation Length ◽  
National Cooperative

Sandy outwash and glacial till soils compose large amounts of public forestland due to historically poor agricultural yields. The outwash soils have low fertility, poor nutrient retention and are restricted from whole-tree harvesting (WTH) in some states, whereas the glacial till has medium nutrient retention and fertility, and is unrestricted from WTH. To assess the long-term sustainability of harvesting, a nutrient budget was constructed from field measurements, the National Cooperative Soil Survey (NCSS) database, and literature values for stem-only harvesting (SOH) and WTH at a 45-year rotation length and 11 rotations were simulated. The budgets showed that SOH and WTH recovery years, or the time necessary for the inputs to match outputs through leaching and one harvest, exceeded common rotation lengths for both soil types under all weathering scenarios, and the average WTH reduced the total available rotations by one harvest. The large variation in soil nutrient pools and harvest removals complicated the ability to identify the difference between SOH and WTH early in the model, but differences became apparent with sequential harvests. The recovery years were 2–20 times the 45-year rotation length under all weathering rates. Taken together, models in this study bridge the gap between short- and long-term studies and bring into question the sustainability of WTH and SOH practices on nutrient-poor soils.

Birds as eutrophicating agents: a nutrient budget for a small lake in a protected area

Hydrobiologia ◽  
2010 ◽  
Vol 646 (1) ◽  
pp. 111-121 ◽  
Author(s):  
Ratcha Chaichana ◽  
Rick Leah ◽  
Brian Moss
Keyword(s):  
Protected Area ◽  
Nutrient Budget ◽  
Small Lake

Nutrient Budget and Biogeochemical Dynamics in Sansha Bay, China: A Coastal Bay Affected by Intensive Mariculture

2021 ◽  
Vol 126 (9) ◽  
Author(s):  
Aiqin Han ◽  
Shuh‐Ji Kao ◽  
Wenfang Lin ◽  
Qiaoyun Lin ◽  
Lili Han ◽  
...  
Keyword(s):  
Nutrient Budget ◽  
Sansha Bay ◽  
Coastal Bay
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