Show MORE HUMUS NEEDED IN SOIL vegetable matter required to make land and light LI porous and mellow admit air and water soil requires vegetable matter to make it light porous and mellow close compact soil does not readily admit moisture and air hence soil organisms that are so essential in breaking down compounds and converting unavailable plant food into available foods for plants cannot thrive but when the soil has bas sufficient vegetable matter decayed to a state slate that wo nye call it humus it admits air and water and lets these plant food helpers thrive to make the soil sell richer close clammy soils will never yield as they should till the per cent of humus is increased DL elayard abard manure and turning under green crops are common ways of increasing the humus by breaking early enough for stalks and we weeds ds to decay more humus may be added |