Show productivity OF SOIL maintained most important object of green Is the addition of needed humus 13 bl R G ATHERSTONE n CATHERS TONn green or the plowing under of 0 green crops Is one of the oldest methods used to maintain or to increase the productivity of the soil the effect ot of green varies arles according to the original character ot of the soil in general sandy or gravelly soils are made darker in color and become more retentive of 0 moisture claye soils are made more porous and friable so that they are less likely to puddle or bake and are less subject to washing ashing w loamy soils are lens leis noticeably affected than others the most important object of green manur Is the addition ot of humus burous to the soil other things being equal the haest best green manure is that which fur alches the largest amount ot of material which will readily decay in the soil and thus form humus there are however additional ways in which w aich such a crop may he be it deep rooted plants are decidedly preferable to shallow hallow rooted because they penetrate pi nitrate into the subsoil in this vay ay air ind and water find entrance specially after the roots decay thus in a way every deep rooted plant its Is a it Is ilso also supposed that such plants especially especial lv when under tand to enrich the suffice soil oil with potash and phosphorus from the thus bringing these substances within the reach ot of shallow rooted plants leguminous plants are more lalu able tile for bren br en nia th glnn in others because taci not litmus dumus but ano alio lune hane tue ability 0 to o use the nitrogen or of the air alch upon dee deci ins ing the add to the soil boil for this rea rca son bon green manure crops should always alvys bo be legumes if 1 such are adapted to the particular locality where needed and can be sown sonn at the time desired |