Show USE 10 E OF WATER requirements lequire ments reduced by thorough I 1 horh cultivation of soil sol 1 k r lt beep and frequent plowing so 60 that weathering of winter may bo be felt to great depths and strongly is of importance V c north dakota agri ay cultural college one of tho the limiting factors in crop t To reduction in tho the dry farming region i water how ilow to mako make it go as tar far i possible Is fully as important as etting wing it into tho be soil and looping it here dr 0 at utah prepared paper for tho the dry farming Con grear BG how to reduce tho the water requirements of plants it was in ie no sense epoch making lie opened I 1 ith the statement that it required from to pounds of 0 water to produce loduco ono one pound of dry matter ho ile quoted doted the experiment of of fianco ranco who mho found that on poor soil it required 1109 pounds of water to pro duce ice one ono pound of dry matter while n i fertile eoll soil it required but 74 ex p iri rl ments in utah brought out similar results suits for instance corn grown on a ratu naturally itu rally fertile piece of at land required ailred pounds of at water mater to produce one 0 o pound of dry matter when ma aured ired it required but adding some sodium daum nitrate in addition to the waro aure reduced it to in another experiment peri ment corn grown on sandy loam not t cultivated required pounds of water ter when cultivated it was re deuced ced to on clay loam not cul abed pounds were required cultivating titivating reduced it to on clay soil 11 oot not cultivated 7 pounds was tho the requirement when cultivated this was 8 reduced to 82 the significance of these figures la Is mcasy to estimate est imite in most sections even en in humid and Irrig irrigated sted ones but especially ec lally in the dry fanning faiming regions ater ter Is the limiting factor ID lo crop production duct lon by having the soil well provided alth ith available plant food the plant nt can make more growth with a given en amount of water just as one would uld have to eat cat more soup it if it were thin n than if thick to supply a given amount aunt of food by putting more re plant food in the soil increases production duct lon without increasing tho the moisture leture requirements cultivating by beeping keeping the moisture from fram evajo rating ing makes ideal conditions for germs ms to work mork on the inert plant food d making it available and so a lamer ser plant growth part of the value of the summer fallow comes from tho plant nt food made available and not alone ne from saving up moisture lie ie sums up as follows at the arese prese sent nt time the only means pos hessed sed by the farmer tor for controlling aspiration transpiration and making possible maximum almura crops mith w ath the minimum amount aunt of water in a properly tilled soil Is to keep the soil AS fertile as possible sible in the light of t fr principle the practice usually recommended for the storing of water and for the prevention alon of the direct evaporation of water er from the soil are emphasized deep P and frequent plowing preferably in he the fall so that the weathering of at the winter Inter may be felt to great depths and strongly is of at the first importance tn liberating plant food cultivation bich ch has been recommended tor for the prevention mention of the direct evaporation of later Is of itself an effective factor fr setting free plant food and thus in educing reducing iho the amount of water mater reed quiren by plants the be experiments at the utah station referred to bring out most strikingly the value of cultivation in reducing |