INVESTIGATIONS INTO SAMPLE-SIZE FOR ESTIMATION OF CROP DENSITY, SHOOT NUMBER AND EAR NUMBER IN WINTER-WHEAT

被引：0

作者：

KLANK, I ^{[1
]}

KRETSCHMER, H ^{[1
]}

MARCHAND, P ^{[1
]}

机构：

[1] AKAD LANDWIRTSCHAFTSWISSEN DDR,FORSCHUNGSZENTRUM BODENFRUCHTBARKEIT MUNCHEBERG,MUNCHEBERG,GERMANY

来源：

ARCHIV FUR ACKER UND PFLANZENBAU UND BODENKUNDE-ARCHIVES OF AGRONOMY AND SOIL SCIENCE | 1990年 / 34卷 / 09期

关键词：

WINTER WHEAT; CROP DENSITY; MODEL; SAMPLING; ACCURACY; SAMPLE SIZE;

D O I：

暂无

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Statistical figures concerning biological crop parameters - number of plants per m2, number of shoots per plant, number of shoots per m2 and number of ear-bearing stems per m2 - are reported from four-year plot experiments on winter wheat. The coefficients of variation ranged from 8 to 18 % for the number of plants per m2 and the number of shoots per plant, whereas they were between 10 and 25 % for the number of shoots per m2 and the number of ear-bearing stems per m2. The available data were used to find the adequate sample size for the different accuracies required. Conclusions on crop survey under experimental and farm-scale conditions are discussed.

引用

页码：653 / 659

页数：7

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