Show DRY LAND CRITICAL PERIODS importance summarized in four good reasons location land math od improvement the importance of critical periods in dry land crop production should be more generally recognized in the tol lowing 1 the selection 0 a location for a dry land farm here not only the average annual precipitation but also I 1 the distribution 0 the rainfall espe dally during the growing months should be considered 2 the choice of crops tor the dry lands crops that are most like to survive successfully the critical peri ode that characterize the country should be planted 3 farming methods these should be planned and carried out with a view to safeguarding the plants of a crop during the most unfavorable times they should invariably so tar as pos sible anticipate critical periods 4 crop improvement the behag lor of crops during critical periods should be carefully observed sur biving plants should be harvested and their seed should be propagated so that the improvement work performed by natural forces may not be lost any knowledge gained through ob during these periods should so tar as possible be applied in the arm practice |