Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich
Autor(a) principal: | |
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Data de Publicação: | 1950 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Anais da Escola Superior de Agricultura Luiz de Queiroz |
Texto Completo: | https://www.revistas.usp.br/aesalq/article/view/48914 |
Resumo: | Statistical analyses of an experiment on wheat were carried out with the aid of Mitscherlich's law. The experiment was made in Ponta Grossa, Paraná, by the Ministry of Agriculture of Brasil. Lime, in the form of Ca(OH)2, was applied at the levels of 0, 2, 4, 6 and 8 metric tons per hectare. A 5 x 5 Latin square was used. Lime was applied in 1940 and wheat was cultivated in the same plots for several years. The following fertilizers were annually used for all plots: NaNO3 100 kilograms per hectare, Superphosphate 350 kilograms per hectare, K2S04 80 kilograms per hectare. The statistical analysis of the data collected in 1941, 1942, 1943, 1947 and 1948, carried out in accordance with the methods previously introduced by Pimentel Gomes and Malavolta (1949 a, 1949 b) and Pimentel Gomes (1950), proved: I. That Mitscherlich's law could be correctly applied to the data. II. That there was a statistically significant effect of lime on wheat yield. III. That the optimum amount of lime to be applied to the soil lies between 5 and 15 hundred kilograms of Ca(OH)2 per hectare. IV. That there is a migration of calcium from some plots to others, in such a way that the data obtained in 1947 and 1948 are not representative of the amounts of lime applied in 1940. V. That the analysis of variance can be used, as the Bartlett test shows that the variances at the distinct levele of lime application are not statistically different. It must be noted that, with improved variety and fertilization, the yield was rised to about 2500 kilograms per hectare in 1947, and 1600 in 1948, being only of about 100 kilograms per hectare in 1940. |
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Anais da Escola Superior de Agricultura Luiz de Queiroz |
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Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de MitscherlichStatistical analyses of an experiment on wheat were carried out with the aid of Mitscherlich's law. The experiment was made in Ponta Grossa, Paraná, by the Ministry of Agriculture of Brasil. Lime, in the form of Ca(OH)2, was applied at the levels of 0, 2, 4, 6 and 8 metric tons per hectare. A 5 x 5 Latin square was used. Lime was applied in 1940 and wheat was cultivated in the same plots for several years. The following fertilizers were annually used for all plots: NaNO3 100 kilograms per hectare, Superphosphate 350 kilograms per hectare, K2S04 80 kilograms per hectare. The statistical analysis of the data collected in 1941, 1942, 1943, 1947 and 1948, carried out in accordance with the methods previously introduced by Pimentel Gomes and Malavolta (1949 a, 1949 b) and Pimentel Gomes (1950), proved: I. That Mitscherlich's law could be correctly applied to the data. II. That there was a statistically significant effect of lime on wheat yield. III. That the optimum amount of lime to be applied to the soil lies between 5 and 15 hundred kilograms of Ca(OH)2 per hectare. IV. That there is a migration of calcium from some plots to others, in such a way that the data obtained in 1947 and 1948 are not representative of the amounts of lime applied in 1940. V. That the analysis of variance can be used, as the Bartlett test shows that the variances at the distinct levele of lime application are not statistically different. It must be noted that, with improved variety and fertilization, the yield was rised to about 2500 kilograms per hectare in 1947, and 1600 in 1948, being only of about 100 kilograms per hectare in 1940.Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz1950-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/aesalq/article/view/4891410.1590/S0071-12761951000100001Anais da Escola Superior de Agricultura Luiz de Queiroz; v. 8 (1951); 1-142316-89350071-1276reponame:Anais da Escola Superior de Agricultura Luiz de Queirozinstname:Escola Superior de Agricultura Luiz de Queiroz (ESALQ-USP)instacron:USPporhttps://www.revistas.usp.br/aesalq/article/view/48914/52991Gomes, Frederico PimentelMalavolta, Eurípedesinfo:eu-repo/semantics/openAccess2012-12-21T12:58:03Zoai:revistas.usp.br:article/48914Revistahttps://www.revistas.usp.br/aesalq/about/contactPUBhttps://www.revistas.usp.br/aesalq/oaiscientia@esalq.usp.br0071-12760071-1276opendoar:2012-12-21T12:58:03Anais da Escola Superior de Agricultura Luiz de Queiroz - Escola Superior de Agricultura Luiz de Queiroz (ESALQ-USP)false |
dc.title.none.fl_str_mv |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich |
title |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich |
spellingShingle |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich Gomes, Frederico Pimentel |
title_short |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich |
title_full |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich |
title_fullStr |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich |
title_full_unstemmed |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich |
title_sort |
Pesquisas sôbre a análise estatística de experiências de adubação com o auxílio da lei de Mitscherlich |
author |
Gomes, Frederico Pimentel |
author_facet |
Gomes, Frederico Pimentel Malavolta, Eurípedes |
author_role |
author |
author2 |
Malavolta, Eurípedes |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Gomes, Frederico Pimentel Malavolta, Eurípedes |
description |
Statistical analyses of an experiment on wheat were carried out with the aid of Mitscherlich's law. The experiment was made in Ponta Grossa, Paraná, by the Ministry of Agriculture of Brasil. Lime, in the form of Ca(OH)2, was applied at the levels of 0, 2, 4, 6 and 8 metric tons per hectare. A 5 x 5 Latin square was used. Lime was applied in 1940 and wheat was cultivated in the same plots for several years. The following fertilizers were annually used for all plots: NaNO3 100 kilograms per hectare, Superphosphate 350 kilograms per hectare, K2S04 80 kilograms per hectare. The statistical analysis of the data collected in 1941, 1942, 1943, 1947 and 1948, carried out in accordance with the methods previously introduced by Pimentel Gomes and Malavolta (1949 a, 1949 b) and Pimentel Gomes (1950), proved: I. That Mitscherlich's law could be correctly applied to the data. II. That there was a statistically significant effect of lime on wheat yield. III. That the optimum amount of lime to be applied to the soil lies between 5 and 15 hundred kilograms of Ca(OH)2 per hectare. IV. That there is a migration of calcium from some plots to others, in such a way that the data obtained in 1947 and 1948 are not representative of the amounts of lime applied in 1940. V. That the analysis of variance can be used, as the Bartlett test shows that the variances at the distinct levele of lime application are not statistically different. It must be noted that, with improved variety and fertilization, the yield was rised to about 2500 kilograms per hectare in 1947, and 1600 in 1948, being only of about 100 kilograms per hectare in 1940. |
publishDate |
1950 |
dc.date.none.fl_str_mv |
1950-12-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/aesalq/article/view/48914 10.1590/S0071-12761951000100001 |
url |
https://www.revistas.usp.br/aesalq/article/view/48914 |
identifier_str_mv |
10.1590/S0071-12761951000100001 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/aesalq/article/view/48914/52991 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
dc.source.none.fl_str_mv |
Anais da Escola Superior de Agricultura Luiz de Queiroz; v. 8 (1951); 1-14 2316-8935 0071-1276 reponame:Anais da Escola Superior de Agricultura Luiz de Queiroz instname:Escola Superior de Agricultura Luiz de Queiroz (ESALQ-USP) instacron:USP |
instname_str |
Escola Superior de Agricultura Luiz de Queiroz (ESALQ-USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Anais da Escola Superior de Agricultura Luiz de Queiroz |
collection |
Anais da Escola Superior de Agricultura Luiz de Queiroz |
repository.name.fl_str_mv |
Anais da Escola Superior de Agricultura Luiz de Queiroz - Escola Superior de Agricultura Luiz de Queiroz (ESALQ-USP) |
repository.mail.fl_str_mv |
scientia@esalq.usp.br |
_version_ |
1797050008620498944 |