4 DEPARTMEiS^T OF AGRICULTURE BULS. 1026-1050. 



Department Bulletin No. 1029. — Seed Treatment and Rainfall in Re- 

 lation TO THE CoNl'ROL OF Cabbage Blackleg: Page. 



Introduction 1 



Effect of fungicidal treatment in the laboratory upon seed and the seed- 

 borne fungus " 3 



Heat and desiccation 5 



Formaldehyde solution 7 



Hot water 9 



Mercuric-chlorid solution 10 



Summary of laboratory seed-treatment experiments 12 



Field trials with treated seeds 13 



Development of the disease in seed bed 13 



Relation of rainfall to the development of the disease 14 



Importance of spread in the seed bed as compared with dissemination 



in the field 17 



Seed-bed trials at Madison, Wis., in 1919 18 



Results with treated seeds in commercial fields 20 



Importance of disease-free seeds 23 



Summary 25 



Literature cited 27 



Department Bulletin No. 1030. — Meade Cotton, an Upland Long-staple 

 Variety Replacing Sea Island: 



Need of replacing sea-island cotton 1 



Decline of the sea-island industry 2 



Value of Meade cotton as a substitute for sea-island demonstrated 2 



Origin of the Meade variety 3 



Description of the variety 4 



Meade cotton adapted to sea-island conditions 4 



Increasing seed supplies in 1918 6 



Experiments with Meade cotton in 1917 and 1918 9 



Work with Meade cotton in 1919 10 



Extending the cultivation of Meade cotton in 1920 11 



Production of Meade cotton in 1920 14 



Cultivation of Meade cotton 15 



Closer spacing ^\'ith Meade cotton 16 



Problem of seed supply of Meade cotton 18 



Selection necessary to maintain uniformity 18 



Spinning tests of Meade cotton 20 



Conclusions 22 



Literature cited 24 



Department Bulletin No. 1031. — Range and Cattle Management During 

 Drought: 



The problem of drought and cattle production 1 



Jornada Range Reserve 4 



Types of vegetation 5 



LTse of the area prior to reservation 10 



Recurrence of drought 11 



Variation in forage production 18 



Variation due to drought 19 



Variation due to grazing 25 



Forage-production conclusions 33 



Grazing capacity 34 



Yearlong or winter range 35 



Summer range 40 



Adjustments necessary in cattle management 41 



Southern New Mexico a cattle-breeding section 42 



Breeding herd should be limited to grazing capacity of the range during 



drought 43 



Surplus stock should vary with range forage production and with the 



market _ - 46 



Range management to obtain maximum- forage production and proper 



use 49 



