Data/hora: 07/06/2024 13:55:14

Biblioteca(s): | Embrapa Clima Temperado; Embrapa Semiárido; Embrapa Solos.
Data corrente: | 03/08/1994
Data da última atualização: | 03/08/1994
Autoria: | HAUSER, G. F.
Título: | The calibration of soil tests for fertilizer recommendations.
Ano de publicação: | 1973
Fonte/Imprenta: | Roma : FAO, 1973.
Páginas: | 71p.
Série: | (FAO. Soils Bulletin, 18).
Idioma: | Inglês
Conteúdo: | The basic problems as discussed in this guide; Errors in soil test data and their prevention: error in the soil sample: duplicate soil sample versus repeated analysis; depth of soil sampling; errors in the laboratory; Comparison of chemical soil test procedures for selection of the most suitable analysis: introduction; procedure; repeated cropping of the potted soils; soil test methods correlating well with field data: nitrogen; phosphorus; potassium;  Growth factors and multivariate analysis: multivarieate analysis; growth factors influencing field; check list of growth factors: soil factors; climatic factors; farm management factors;  Field experiments for soil test calibrations: lay-out, design; management; observations during crop growth; harvest; Simultaneous calibration for two nutrients;  Graphical methods for improved soil test/yield response correlations; corrections for influencial growth factors: the principle; the graphical method; disturbing interactions and correlations between growth factors; successive corrections for various growth factors; curvilinear arrangements of points; the partition of graphs; intersection of regression lines and critical level; the logarithmic regression; hand-drawn regression curves; Improving soil test/crop response correlations; using nutrient uptake figures; percent yield versus absolute response; inconsistent data; The interpretation and use of soil test/crop response correlations for fertilizer recommendations; the interpretation graph; development of interpretation graphs from experimental data; basic fertilizer recomendations; site-specific adjustments of basic recommendations; follow-up field trials; the philosophy of soil test recommendations; Initiation of a soil testing service: general requirments: government attitude and placement of the soil testing service; technical personnel; technical approach to calibration problems; facilities for field experimentation; preparations in the laboratory; Start of field experimentation; Operational material and other requirements: request forms, sample boxes and soil test reports; crop information sheets; soil testing information sheets; assistance by extension service.
Palavras-Chave: | Calibracao; Fertilizacao; Recomendacao; Teste.
Thesagro: | Fertilizante; Solo.
Thesaurus Nal: | Soil.

Categoria do assunto:

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P Recursos Naturais, Ciências Ambientais e da Terra

Registro original: | Embrapa Clima Temperado (CPACT)

Exemplares:

CPATSA - (16749-1) - ADD - LV - PP - 631.41 - H376c - 1983.01182 - DIS
CNPS - (7869-1) - ADD - LV - -- -  -  - 1998.00361 - DIS
CPACT - (1463-1) - ADC - LV - -- - 631.81 - H376c - 1983.01095 - DIS