Directed Sampling Using Topography as a Logical Basis

Franzen, David W.; Halvorson, Ardell D.; Krupinsky, J. M.; Hofman, Vern; Cihacek, Larry

doi:10.2134/1999.precisionagproc4.c57b

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…Appropriate soil testing aids in determining the recommended amounts of N application that may be needed in a field setting. Management zoning is one method of representative soil sampling for field‐scale recommendations that is executed by collecting samples from similar soil color, yield, electrical conductivity, topography, and soil type (Franzen et al., 1996; Franzen et al., 1999; Schepers et al., 2004). Even with considerations of organic matter, previous crop type, and amount of residue left on the soil surface, it is difficult to measure how much organic matter N can mineralize in each zone during the season (Bibi et al., 2016; Sharma & Bali, 2018).…”

Section: Nitrogen Management Strategies In No‐till Systemsmentioning

confidence: 99%

Do post‐harvest crop residues in no‐till systems provide for nitrogen needs of following crops?

Alghamdi

Cihacek

2021

Agronomy Journal

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Increased adoption of no‐till systems in the Northern Plains has led to an increased volume of post‐harvest crop residue. A cool climate coupled with short growing seasons benefits from a conservation tillage approach by increasing water storage in semi‐arid areas where weather conditions are variable each year. The short frost‐free period presents challenges for residue decomposition and the subsequent nutrient uptake period is reduced in heavy accumulated crop fields. A combination of soil management practices can be used to optimize nutrient utilization, particularly for nitrogen (N), including the use of cover crops, crop rotation and diversification, and variances in fertilizer form, method, and timing. Despite many management practices being effective in conserving N in the soil, they still may not meet nutrient demands for succeeding crops in short season and water‐ and N‐limited environments. Decomposition of crop residue is dependent on soil moisture, soil temperature, and the carbon/nitrogen (C/N) ratio of crop residue. Generally, post‐harvest crop residues have a wider C/N ratio than aged residue that accumulates on the soil surface over time. Adding fertilizer N may reduce the immobilization of nutrients near the soil surface of a post‐harvest residue in heavily accumulated crop fields, making it more available for utilization by plants. Recommendations for fertilizer N rates are inconsistent throughout the northern US for long‐term no‐till systems. This review highlights several decades of known research yet points to the continued gaps needed for producers to fully support fertilizer N recommendations for no‐till systems in temperate climates.

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Section: Nitrogen Management Strategies In No‐till Systemsmentioning

confidence: 99%

Do post‐harvest crop residues in no‐till systems provide for nitrogen needs of following crops?

Alghamdi

Cihacek

2021

Agronomy Journal

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“…To reduce the number of samples and sampling costs zone sampling is suggested to provide a way to group the spatial variability of soils while maintaining acceptable information about soil properties [36]. Sampling by zone assumes that sampling areas are likely to remain temporally stable [36,37].…”

Section: Soil Sampling Zones and Sample Collectionmentioning

confidence: 99%

Soil Erosion Prediction Using Morgan-Morgan-Finney Model in a GIS Environment in Northern Ethiopia Catchment

Tesfahunegn

Tamene²,

Vlek

2014

Applied and Environmental Soil Science

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Even though scientific information on spatial distribution of hydrophysical parameters is critical for understanding erosion processes and designing suitable technologies, little is known in Geographical Information System (GIS) application in developing spatial hydrophysical data inputs and their application in Morgan-Morgan-Finney (MMF) erosion model. This study was aimed to derive spatial distribution of hydrophysical parameters and apply them in the Morgan-Morgan-Finney (MMF) model for estimating soil erosion in the Mai-Negus catchment, northern Ethiopia. Major data input for the model include climate, topography, land use, and soil data. This study demonstrated using MMF model that the rate of soil detachment varied from <20 t ha−1y−1to >170 t ha−1y−1, whereas the soil transport capacity of overland flow (TC) ranged from 5 t ha−1y−1to >42 t ha−1y−1. The average soil loss estimated by TC using MMF model at catchment level was 26 t ha−1y−1. In most parts of the catchment (>80%), the model predicted soil loss rates higher than the maximum tolerable rate (18 t ha−1y−1) estimated for Ethiopia. Hence, introducing appropriate interventions based on the erosion severity predicted by MMF model in the catchment is crucial for sustainable natural resources management.

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“…Diversas metodologias para se definir as unidades de gerenciamento foram propostas, entre elas a utilização da topografia (Franzen et al, 1998;Kravchencko & Bullock, 2000), fotografias aéreas, imagens do dossel das culturas (Johansen et al, 1999), sensoriamento remoto (Mulla & Schepers, 1997).…”

Section: Unidades De Gerenciamento E Condutividade Elétricaunclassified

Definição de unidades de gerenciamento do solo por meio da sua condutividade elétrica e variáveis físico-químicas.

Castro¹

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Dedico ao meu pai, Antônio Maria Gomes de Castro, e a minha mãe, Maria Zélia Nunes de Castro, por terem me dado o apoio e as condições necessárias para ser quem hoje sou e superar os desafios que me foram propostos durante a elaboração desse trabalho. Dedico aos meus irmãos Cristiano Nunes de Castro e Claúdia Nunes de Castro pelos quais eu tenho tanto apreço e que sei que "torcem" por mim tanto quanto eu torço por eles. Dedico ao meu orientador José Paulo Molin que tão bem me aconselhou durante o curso de mestrado, que me orientou durante a confecção desta dissertação e cujos conselhos foram de grande valia em tornar o caminho, por vezes "tortuoso", do aprendizado científico em algo um pouco mais "retilíneo" para que este inexperiente aprendiz da investigação científica tivesse uma melhor jornada. AGRADECIMENTO Agradeço ao Eng. Agronômo Leandro Maria Gimenez, pesquisador da Fundação ABC, que tanto auxiliou nas etapas de coleta dos dados que foram utilizados nesta pesquisa e que sem o seu suporte em Castro muito prejudicaria o bom andamento das tarefas requeridas para conclusão deste trabalho. Agradeço aos demais funcionários da Fundação ABC que auxiliaram nas etapas de coleta de dados deste trabalho. Agradeço aos funcionários do Departamento de Engenharia Rural da ESALQ-USP que atenciosamente sempre me auxiliaram em preparar os equipamentos que seriam utilizados nas pesquisas de campo. Especial agradecimento

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Directed Sampling Using Topography as a Logical Basis

Cited by 6 publications

References 11 publications

Do post‐harvest crop residues in no‐till systems provide for nitrogen needs of following crops?

Do post‐harvest crop residues in no‐till systems provide for nitrogen needs of following crops?

Soil Erosion Prediction Using Morgan-Morgan-Finney Model in a GIS Environment in Northern Ethiopia Catchment

Definição de unidades de gerenciamento do solo por meio da sua condutividade elétrica e variáveis físico-químicas.

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