Show SUPPLYING HUMUS TO SOILS first and best method Is addition of stable manure plant green crops to turn under prepared by tile the united states department of agriculture there are three general methods of supplying humus to the soil the first and best Is the addition of stable manure when properly managed it adds large quantities of both plant food and humus cut manure Is not always avril available lable when such Is the case cage the best thing to do Is to make it available raise more forage keep more stock and make more manure but this takes time and capital so that other means are sometimes necess necessary tiry when stable manure Is not fiot to be lind had plant crops for the purpose of turning them under thus adding large quantities of humus at comparatively little cost plowing under green crops Is called green under certain conditions tills Is nn an excellent practice A third method of adding humus is to grow crops tike clover und and timothy those these crops tire are usually allowed to occupy the land for two years or more during this time their roots thoroughly penetrate the soil old roots decay and new ones prow row when tile the sod Is plowed up more or less vegetable matter Is turned under this with the of roots in the soil adds no small amount to the supply of humus another advantage from the hie cultivation of clovers and alfalfa Is found in tact act that they are deep rooted plants and when their roots decay they leae channels deep into the earth thus thas aiding in the absorption of ruins rains and let ling in air to s sweeten eeten the soil roll perennial grasses lit like e timothy are par ticul arly valuable us as the numerous roots leave the soll soil in very fine alth |