Consulta: subjectFacets:"Nutrient loss"
Registros recuperados: 5
Data/hora: 12/06/2024 14:54:25

ENVIRONMENTAL EFFECTS OF AGRICULTURAL LAND-USE CHANGE: THE ROLE OF ECONOMICS AND POLICY
Provedor de dados: 31
Autores: Lubowski,   Ruben N.; Bucholtz,   Shawn; Claassen,   Roger; Roberts,   Michael J.; Cooper,   Joseph C.; Gueorguieva,   Anna; Johansson,   Robert C.
This report examines evidence on the relationship between agricultural land-use changes, soil productivity, and indicators of environmental sensitivity. If cropland that shifts in and out of production is less productive and more environmentally sensitive than other cropland, policy-induced changes in land use could have production effects that are smaller-and environmental impacts that are greater-than anticipated. To illustrate this possibility, this report examines environmental outcomes stemming from landuse conversion caused by two agricultural programs that others have identified as potentially having important influences on land use and environmental quality: Federal crop insurance subsidies and the Conservation Reserve Program (CRP), the Nation's...
Tipo: Report
Palavras-chave: Conservation Reserve Program (CRP); Crop insurance; Erosion; Extensive margin; Farm policy; Imperiled species; Land use; Land-use change; Land quality; Nutrient loss; Soil productivity; Environmental Economics and Policy; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/33591

Impacts of Pig Slurry Applied to Two Different Soils on Nutrient Transport by Runoff
Provedor de dados: 90
Autores: Kaufmann,Danieli Schneiders; Bertol,Ildegardis; Santos,Maria Aparecida do Nascimento dos; Bagio,Barbara; Mecabô Júnior,José; Borg,Heinz.
ABSTRACT: Runoff in agricultural areas with intensive application of pig slurry can transport significant amounts of nutrients. This study evaluates the effects of different pig slurry (PS) application rates (0, 50, 100, and 200 m3 ha-1) on nutrient loss through runoff during soybean cultivation under no-tillage. It was conducted at two sites in southern Brazil, one on an Alfisol (27° 43' south and 50° 3' west) and one on an Inceptisol (27° 47' south and 50° 18' west). The PS was applied to the soil once at the beginning of the soybean cycle. Each plot was 11 m long in the direction of the slope and 3.5 m wide. To induce runoff, artificial rainfall was applied in four different tests (T1, T2, T3, T4), with an intensity of 65 mm h-1 for 90 minutes. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic fertilization; Artificial rainfall; Nutrient loss.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100502

Potassium leaching in different soils as a function of irrigation depths
Provedor de dados: 91
Autores: Mendes,Walter da C.; Alves Júnior,José; Cunha,Paulo C. R. da; Silva,Anderson R. da; Evangelista,Adão W. P.; Casaroli,Derblai.
ABSTRACT Potassium (K) can be easily lost by the leaching process. The objective of this study was to quantify K leaching in clayey and sandy soils under increasing irrigation depths. The experiment was conducted in 2014, in a protected environment, after extraction of undisturbed soil columns, with diameter of 144 mm and height of 300 mm. The columns were arranged in a randomized complete block in a factorial design with three replicates, corresponding to eight treatments: two soil types and four water depths, equivalent to 50, 100, 150 and 200% of the amount of water necessary to bring the soil moisture to field capacity. Potassium chloride, with 58% of K2O, was used as K source. Water replacement in the columns was performed every three days, for a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilization; Soil texture; Nutrient loss; Water management.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001100972

การศึกษาปัจจัยการละลายได้ในน้ำของสารประกอบรวมกลุ่มฟีนอลลิคที่ละลายน้ำในข้าว
Provedor de dados: 106
Autores: Kittitat Thanta; Somchai Lapanantnoppakhun; Malin Julsiri; Chanakan Prom-u-thai; Kate Grudpan.
Tipo: Collection
Palavras-chave: Monomeric anthocyanin; Water soluble phenolic compound; Rice; Nutrient loss; ข้าว; การสูญเสียธาตุอาหาร; โมโนเมอร์ริกแอนโทไซยานิน; สารประกอบฟีนอลที่ละลายน้ำ.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5365

Phosphorus transfer at a small catchment in southeastern Brazil: distributed modelling in different land use scenarios
Provedor de dados: 64
Autores: Bispo,Diêgo Faustolo Alves; Silva,Marx Leandro Naves; Marques,João José Granate de Sá e Melo; Bechmann,Marianne; Batista,Pedro Velloso Gomes; Curi,Nilton.
ABSTRACT Identifying and ranking nutrient loss risk areas are important steps towards integrated catchment management. This study aimed to apply the P index model at the Posses catchment, south of the state of Minas Gerais, Brazil. We applied the P index for the current land use at the Posses catchment and for two hypothetical scenarios: scenario 1, in which P fertilizer was applied to all land uses, except for native forests; and scenario 2, which considered the use of P fertilizer as in scenario 1, and that the Environmental Protection Areas referring to the riparian forests and springs were totally restored. Considering current land use, almost the whole catchment area (91.4%) displayed a low P loss risk. The highest P index was associated to croplands...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: P index; Nutrient loss; Water erosion; Land use management; Environmental services.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500565