358 THE FUTURE OF ARID LANDS 
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Figure 1. Exploratory layout to determine nutrient deficiencies on 
the range by plant response. 
The following materials and amounts are suggested for each 60-by-80-foot strip: 
Horizontal strips: 1-1, nothing applied horizontally. 2-2, 8 pounds treble superphosphate. 
3-3, 8 pounds treble superphosphate and 8 pounds muriate of potash in turn applied uni- 
formly. 4-4, 8 pounds muriate of potash. 
Vertical strips: A-A, nothing applied vertically. B-B, 16 pound, gypsum. C-C, 16 pounds 
gypsum and 4 to 8 pounds ammonium nitrate. D-D, 4 to 8 pounds ammonium nitrate. 
Just before the stakes are pulled if two or three handfuls of borax are spread in a circle 
of about 2 feet diameter around each stake as indicated by an open circle, the killed growth 
makes the plot easy to find later. 
population of annual legumes, together with concentrated grazing, 
will reduce the population of undesirable annual grasses and sum- 
mer weeds to a remarkable extent. Therefore, fertilizers and soil 
amendments should be tried along with the annual legumes. 
