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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Pantanal. |
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Data corrente: |
25/07/1995 |
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Data da última atualização: |
11/05/2022 |
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Autoria: |
HAYDOCK, K. P.; SHAW, N. H. |
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Título: |
The comparative yield method for estimating dry matter yield of pasture. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Australian Journal of Experimental Agriculture and Animal Husbandry, v. 15, p. 663-670, Oct. 1975. |
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Idioma: |
Inglês |
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Conteúdo: |
This paper describes a new method for estimating pasture yield in which the yields of random quadrats are rated with respect to a set of reference quadrats preselected in the field to provide a scale which is available for reference throughout the sampling. Three alternative calibration procedures are described based either on the dry matter yields of the reference quadrats or on the yields of quadrats rated and cut either during or at the end of sampling. The second and third procedures are shown to have advantages over the first. When testing the methods with four observers and two types of clibration scales, estimates of mean yield were generally within 4 per cent of the actual mean with a maximum difference of 8 per cent. Methods are given for calculating the number of samples required to obtain minimum variance for the estimate of mean yield for a given cost in terms of time spent in the field. |
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Palavras-Chave: |
Comparative yield method; Dry matter; Metodo de rendimento comparativo; Pasture; Production. |
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Thesagro: |
Matéria Seca; Pastagem; Produção; Seca. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01606naa a2200241 a 4500
001 1352931
005 2022-05-11
008 1975 bl --- 0-- u #d
100 1 $aHAYDOCK, K. P.
245 $aThe comparative yield method for estimating dry matter yield of pasture.
260 $c1975
520 $aThis paper describes a new method for estimating pasture yield in which the yields of random quadrats are rated with respect to a set of reference quadrats preselected in the field to provide a scale which is available for reference throughout the sampling. Three alternative calibration procedures are described based either on the dry matter yields of the reference quadrats or on the yields of quadrats rated and cut either during or at the end of sampling. The second and third procedures are shown to have advantages over the first. When testing the methods with four observers and two types of clibration scales, estimates of mean yield were generally within 4 per cent of the actual mean with a maximum difference of 8 per cent. Methods are given for calculating the number of samples required to obtain minimum variance for the estimate of mean yield for a given cost in terms of time spent in the field.
650 $aMatéria Seca
650 $aPastagem
650 $aProdução
650 $aSeca
653 $aComparative yield method
653 $aDry matter
653 $aMetodo de rendimento comparativo
653 $aPasture
653 $aProduction
700 1 $aSHAW, N. H.
773 $tAustralian Journal of Experimental Agriculture and Animal Husbandry$gv. 15, p. 663-670, Oct. 1975.
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Registro original: |
Embrapa Amapá (CPAF-AP) |
