The 0 yield decrement values represent expected threshold values at which salinity begins to affect crop yields. The data are based on yield averages of representative crop varieties over a period of time. Actual yield reductions may vary depending upon the variety planted and climatic conditions during the growing season. Fruit Crops may show greater yield variation due to salinity because a large number of rootstocks and varieties are available. Also, stage of plant growth has a bearing on salt tolerance.
Seedlings usually are most sensitive to salt during the emergence and early stages.
Plant salt tolerance usually increases as the crop develops through the growing season. This is fortunate, because many of Colorado's irrigation waters increase in salt concentration during the latter part of the irrigation season. The salt tolerance values apply only from the late seedling stage through maturity, during the period of most rapid plant growth. Crops in each class are ranked in order of decreasing salt tolerance insofar as possible. Salt tolerance of field Crops.