Soil inoculation for legumes; with reports upon the successful use of artificial cultures by practical farmers . istinct harm. It is possible for nitrogen-fixing bacteria to penetrate the roots ofplants and be of decided benefit without the formation of nodules orany external evidence of their presence. While it is desirable that artificial inoculation be made at the timeof planting, experience has shown that under certain conditions cropsof three or four years standing are improved by adding bacteria tothe soil. Inoculation is usually of no benefit to soil already containing theproper bacteri
Soil inoculation for legumes; with reports upon the successful use of artificial cultures by practical farmers . istinct harm. It is possible for nitrogen-fixing bacteria to penetrate the roots ofplants and be of decided benefit without the formation of nodules orany external evidence of their presence. While it is desirable that artificial inoculation be made at the timeof planting, experience has shown that under certain conditions cropsof three or four years standing are improved by adding bacteria tothe soil. Inoculation is usually of no benefit to soil already containing theproper bacteria, although there may be exceptions. It should notbe practiced where the soil is so rich in nitrogen as to prevent thedevelopment of the nitrogen-fixing organism. The inoculation of seed and soil by means of pure cultures grownand distributed according to methods devised by the Department ofAgriculture is shown by the reports of practical farmers to be ofdistinct advantage when used under circumstances that will permitbenefit. O Jul. 71, Bureau of Plant Industry, U. S. Dept of Agricuitur Plate r ° z Co - o. Bui. 71, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate
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