1971
DOI: 10.2134/agronj1971.00021962006300020008x
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Harvest Index in Cereals1

Abstract: Harvest index values were studied in cereals during 1964 to 1967. A high degree of variability was found in the harvest index of winter wheat and other cereals. Stems contributed the greatest amount of dry weight to the straw yield and thus, as a vegetative part, materially influenced the harvest index. Reduction in plant height had the greatest effect on the stem dry weight and least on grain yield. Reduction in plant height lowered the dry weight of the vegetative parts and thereby lowered the straw yield wh… Show more

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Cited by 135 publications
(65 citation statements)
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“…Isto mostra que para o cultivar de ciclo curto, aumentando-se o IC, ou seja, maior eficiência na translocação dos produtos da fotossíntese para os grãos, há incremento na produção de grãos. O que ratifica os resultados obtidos por diversos pesquisadores (DONALD, 1968;JENNINGS & AQUINO, 1968;SINGH & STOSKOPF, 1971;DONALD & HAMBLIN, 1976) O 'Guarani', por demonstrar ser um cultivar mais competitivo que o 'Araguaia', apresentou menor IC e seu rendimento de grãos foi mais influenciado pelos efeitos do espaçamento e da densidade de semeadura. Isso corrobora com as conclusões relatadas em vários estudos (DONALD, 1968;JENNINGS & AQUINO, 1968;JENNINGS & JESUS, 1968;PEREIRA, 1989).…”
Section: Resultsunclassified
“…Isto mostra que para o cultivar de ciclo curto, aumentando-se o IC, ou seja, maior eficiência na translocação dos produtos da fotossíntese para os grãos, há incremento na produção de grãos. O que ratifica os resultados obtidos por diversos pesquisadores (DONALD, 1968;JENNINGS & AQUINO, 1968;SINGH & STOSKOPF, 1971;DONALD & HAMBLIN, 1976) O 'Guarani', por demonstrar ser um cultivar mais competitivo que o 'Araguaia', apresentou menor IC e seu rendimento de grãos foi mais influenciado pelos efeitos do espaçamento e da densidade de semeadura. Isso corrobora com as conclusões relatadas em vários estudos (DONALD, 1968;JENNINGS & AQUINO, 1968;JENNINGS & JESUS, 1968;PEREIRA, 1989).…”
Section: Resultsunclassified
“…After threshing, the seeds were cleaned and sun-dried, and seed and straw yields were recorded and expressed in tonnes ha -1 as given in the research manuscript. The harvest index was calculated by the formula given by Singh and Stoskopf (1971).…”
Section: Grain and Straw Yields Of Wheatmentioning
confidence: 99%
“…The harvested material from each plot was thoroughly sun dried and weighed to record biological yield. Harvest index (HI) was calculated as per the procedure prescribed by Singh and Stoskopf (1971). Economics of each treatment was worked out on prevailing market price of input and output in terms of net returns ( ha -1 ) and B: C ratio to compare the profitability of different treatments.…”
Section: Methodsmentioning
confidence: 99%