Some methods of recording data in timothy breeding
1922
Evans, M.W.
In timothy breeding, which is a comparatively new phase of experimental agronomy, standard methods have yet to be worked out and adopted. Several methods which have recently been developed for making comparative quantitative studies of different selections or varieties of timothy are described in this paper.Through the use of certain definitions which describe timothy plants in different stages of bloom and maturity, it has been possible to obtain accurate records of the time when the plants of different selections or varieties of timothy are in bloom and mature. A system of counting the number of leaves with partially or entirely green blades has been developed, by which the relative numbers of green leaves, per unit of area, on different dates in broadcast plats of different kinds of timothy, can be accurately determined. By measuring the longest stem of each plant growing in cultivated row plats of different selections or varieties of timothy, it is possible to obtain data which show not only the relative lengths of the stems of the plants in the different plats, but which also show the relative degree of uniformity in the lengths of the stems of plants in the plats in which measurements are made.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par National Agricultural Library
Découvrez la collection de ce fournisseur de données dans AGRIS
