|
Registro Completo |
|
Biblioteca(s): |
Embrapa Amapá; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Pantanal. |
|
Data corrente: |
11/06/1996 |
|
Data da última atualização: |
28/10/2014 |
|
Autoria: |
MANNETJE, L. 'T.; HAYDOCK, K. P. |
|
Afiliação: |
Division of Tropical Pastures, C.S.I.R.O., Brisbane, Australia. Division of Mathematical Statistics, C.S.I.R.O., Brisbane, Australia. |
|
Título: |
The dry-weight-rank method for the botanical analysis of pasture. |
|
Ano de publicação: |
1963 |
|
Fonte/Imprenta: |
Journal of the British Grassland Society, v. 18, p. 268-275, 1963. |
|
Idioma: |
Inglês |
|
Conteúdo: |
A method is presented which gives an accurate estimate of the botanical composition of grassland on a dry-weight basis, without the necessity of cutting and hand-separating samples. In a number of quadrats an observer estimates which species take first, second, and third place in terms of dry-weight. The data are tabaulated to give the proportion of quadrats in which each species received first, second, and third place. These proportions are multiplied by 70.2, 21.1, and 8.7, respectively, and added to give the dry-weight percentages of each species. The dry-weight-rank method was tested four times by comparing the results with those of hand-separating cut samples. No great differences between the two methods were detected when exact rankings, obtained from hand-separating, were used, and it was found that ranks could be estimated accurately, provided that sufficient training had been given to the observers. |
|
Palavras-Chave: |
Analise botanica; Botanical analysis; Dry-weight; Dry-weight-rank; Method; Pasture; Peso Seco. |
|
Thesagro: |
Método; Pastagem. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01559naa a2200241 a 4500
001 1352940
005 2014-10-28
008 1963 bl --- 0-- u #d
100 1 $aMANNETJE, L. 'T.
245 $aThe dry-weight-rank method for the botanical analysis of pasture.
260 $c1963
520 $aA method is presented which gives an accurate estimate of the botanical composition of grassland on a dry-weight basis, without the necessity of cutting and hand-separating samples. In a number of quadrats an observer estimates which species take first, second, and third place in terms of dry-weight. The data are tabaulated to give the proportion of quadrats in which each species received first, second, and third place. These proportions are multiplied by 70.2, 21.1, and 8.7, respectively, and added to give the dry-weight percentages of each species. The dry-weight-rank method was tested four times by comparing the results with those of hand-separating cut samples. No great differences between the two methods were detected when exact rankings, obtained from hand-separating, were used, and it was found that ranks could be estimated accurately, provided that sufficient training had been given to the observers.
650 $aMétodo
650 $aPastagem
653 $aAnalise botanica
653 $aBotanical analysis
653 $aDry-weight
653 $aDry-weight-rank
653 $aMethod
653 $aPasture
653 $aPeso Seco
700 1 $aHAYDOCK, K. P.
773 $tJournal of the British Grassland Society$gv. 18, p. 268-275, 1963.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amapá (CPAF-AP) |
|
