KANGE AND CATTLE MANAGEMENT DURING DROUGHT. 



35 



sufficient tange forage and supplemental feeding. Rapid advance- 

 ment in this respect has already taken place in the past few years. 



Along with the records of change in vegetation under protection 

 against grazing and undergrazing over the period 1915 to 1919, in- 

 clusive, daily records have been kept of the animal days feed fur- 

 nished by each of the pastures on the Jornada Range Reserve, and 

 approximate figures by seasons for adjoining and nearby unfenced 

 ranges have been obtained. 



YEARLONG OR WINTER RANGE. 



The main portion of the yearlong or winter range, consisting of 

 the pure grama grass, part of the mixed grass, the snakeweed, and 

 the mesquite-sandhill types on the Jornada Range Reserve occurs in 

 pastures 2, 5, and 10. Carrying-capacity data for these pastures and 

 for similar outside range grazed yearling (Tables 10, 11, 12, and 13) 

 show the reduction in carrying capacity during drought and the effect 

 of the time and degree of grazing. 



In the tables condition of the range, in each case, with the ex- 

 ception .of pasture 10, is compared with the protected areas for each 

 year when such data were available, to eliminate approximately the 

 factor of moisture and get at the influence of grazing alone in caus- 

 ing range depreciation. 



Table 10. — Grazing capacity of pasture 2, 1913 to 1919. 



[Area of pasture, 34,545 acres.] 



Period, July 1 to June 30. 



Average 



acres 



per head 



per year 



(365 days). 



Estimated 

 per cent of 



available 

 forage 



utilized. 



Estimated 



grazing 



capacity 



in acres, 



per head. 



Condition 

 of range in 

 per cent of 

 condition 



on pro- 

 tected area. 



1913-1 4 



26.6 

 47.0 

 33.1 

 43.9 

 42.6 

 93.6 



100 



57 

 80 

 90 

 1125 

 90 



26.6 

 26.6 

 26.5 

 39.5 

 53.2 

 81.2 





1914-15 





1915-16 



108.0 



1916-17 



72.2 



1917-lS. . 



50.0 



1918-19 



34.6 



1919-20 



47.5 













1 80,900 pounds of cottonseed-cake fed in this pasture during the spring of 1918, which increased utUiza- 

 tioii25per cent. 



Table 11. — Ghxizing capacity of pasture 5, 1915 to 1919. 

 [Area of pasture, 2,815 acres.] 



Period, July 1 to Jime 30. 



Average 



acres 



per head 



per year 



(365 days). 



Estimated 

 per cent of 



available 

 forage 



utilized. 



Estimated 

 grazuig 

 capacity 

 in acres, 

 per head. 



Condition 

 of range in 

 per cent of 



condition 



on pro- 

 tected area. 



1915-16 



23.1 



125 

 100 

 100 

 125 



28.1 

 36.0 

 35.2 

 27.9 



63.8 



1916-17 



1917-18 



1918-19 



1919-20 



36.0 

 35.2 

 22.3 



69.5 



82.7 

 89.6 

 98.8 



1 ! 







