Image d'archive à partir de la page 492 de la Cyclopaedia de cultures agricoles (1922). Cyclopedia de récoltes cyclopediaoffarm00sous caution Année : 1922 LES PRAIRIES ET LES PÂTURAGES DES PRAIRIES ET DES PÂTURAGES, de l'entreprise une amende 439 graine lit est nécessaire, et la sous-sur- face doit être compact pour assurer le passage à la hausse de l'humidité. Ce point fera porter l'accent, de nombreux échecs- lié à ne pas avoir la graine lit suffisamment compact. Fig. 667. Six dents de fourche à grappin avec lance. Ouverte. Semé en automne s'il est habituellement conseillé de semer au plus tard le Septemlier 1. Les semis de printemps devrait être fait dès que le terrain le permettra. Le trèfle est usua

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Archive image from page 492 of Cyclopedia of farm crops (1922). Cyclopedia of farm crops cyclopediaoffarm00bail Year: 1922 MEADOWS AND PASTURES MEADOWS AND PASTURES 439 A fine, firm seed-bed is necessary, and the sub-sur- face must be compact to ensure the upward passage of moisture. This point will bear emphasis, many- failures occuring from not having the seed-bed sufficiently compact. Fig. 667. Six-tine grapple fork with spear. Open. If sown in fall it is usually advisable to sow not later than Septemlier 1. Spring sowing should be done as early as the ground will permit. Clover is usually sown in spring when the snow is still on the ground. This is a good practice because it is found that clovers germinate best under the low and steady temperature which is then maintained. Kentucky blue-grass, however, germinates best when subjected to a temperature alternating be- tween 68° and 86° F.; hence, if it is sown in fall, on or near the surface, these conditions are secured. Thus each kind of grass has a certain temperature or range of temperatures which are best suited for its germination. Under ordinary circumstances and with tempo- rary seedage, the sowing of the grass with a grain crop is advisable because it economizes the use of the land. It is well to mow the grass early the first year, even if it is to be used as a pasture. This prevents the grasses going to seed and thus weak- ening themselves. It may not be advisable to seed with a grain crop when an e.xpensive seed mixture is used in seeding permanently, when the land is very rich — the grain crop would lodge — nor when it is so poor in condition that it could not carry both crops. Number and weight cf grass seeds aiid amount to sow. It is hardly possible to give the exact formulae for seeding land to grass. The following notes are merely suggestive and may need modification to meet varying conditions. As already stated, various authorities have asserted that 10, 000, 000 to 20, - 000, 000 viable gras

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