Arizona A&RiccrrcmAL Experiment Station. 158 



cgreen-manuring of orchards. As was the case last year., the best 

 results were obtained from October sowings. Earlier than Octo- 

 ber, the temperature is too high to secure a good stand; and sow- 

 rings made later than this month do not have sufficient time to be- 

 come established before the cool weather of winter. This year's 

 •experience teaches that the crop should be plowed under during 

 the latter part of March, about two weeks earlier than most of the 

 rowings were turned under. By early April the crop had become 

 •so heavy as to be nearly unmanageable^ A few weeks earlier the 

 plants were not so large, were more succulent, and would have 

 turned under more readily and decayed more rapidly. 



Alfalfa is less suitable for winter green-manuring, since the 

 \seed is more expensive, the growth is lighter, and it is more diffi- 

 cult to kill when spring comes than the yellow sweet-clover. 



The lupins make a mole rapid growth during autumn, and 

 reach maturity sooner than alfalfa or the clover: but the compara- 

 tive yield is too light for the purpose. 



VEGETABLES 



Owing to the demand for information concerning the culture 

 ■of vegetables, considerable attention has been given to experi- 

 ments with the leading kinds. The \vork during the previous 

 year was quite miscellaneous; but during the past year attention 

 "has been confined principally to experiments with cabbage, cauli- 

 flower, lettuce, melons, onions, and potatoes. 



During the latter part of the year a bulletin was prepared giv- 

 ing dates for seeding, methods of irrigation and culture, and suit- 

 able varieties of each of the principal vegetables grown in south- 

 ern Arizona. The unique climatic conditions of the region made 

 the issuing of such a bulletin important, 



CABBAGE, 



A large number of varieties of cabbage were tested. Sowings 

 of seed were made during May, August, and late September, 

 Those sown during May were set out during August, and matured 

 during December and January; those sown during August were 



