CONTENTS 



Depaktment Bulletin No. 1276. — Varietal Experiments with Hard 

 Red Winter Wheats in the Dry Areas op the Western United 

 States: 



The hard red winter wheats 



Varieties compared 



Key to the varieties 



Origin of the varieties 



Location of the experiments 



Great Plains area 



Great Basin area 



Experimental methods 



Number and size of plats 



Interpretation of the results 



Varietal experiments 



Acre yield 



Summary of yields 



Days from emergence to maturity 



Winter survival 



Stem-rust infection 



Height of plant 



Test weight per bushel 



Crude-protein content 



Yield of flour 



Volume of loaf 



Summary of results : 



Department Bulletin No. 1277. — Input as Related to Output in 

 Farm Organization and Cost-of-Production Studies: 



Introduction 



Analyses 



Input variations 



Output per unit of input 



Applications 



The least-cost combination of inputs 



The most profitable combination of inputs 



The combination of enterprises 



Further applications i 



Production standards 



Choice of farm practices 



Planning a farm business 



Cost indices , 



Elasticity of supply 



Statistical methods 



Proper theoretical analysis essential 



The nature of the problem 



Multiple correlation 



Curvilinear correlation 



Multiple curvilinear correlation 



Department Bulletin No. 1278. — Production of Henequen Fiber 

 in Yucatan and Campeche: 



Introduction 



Outline of the binder-twine fiber situation 



Importance of henequen in Yucatan 



Climatic conditions 



Soil conditions 



1 ri ographical distribution 



A reas planted 



Varieties 



Plantation organization and management 



79499?— 28 3 



Pass 



1 

 2 

 3 



4 



7 



8 



8 



9 



9 



9 



10 



12 



33 



33 



36 



37 



39 



41 



44 



45 



45 



46 



1 



3 



3 



16 



24 

 24 

 31 

 35 

 36 

 36 

 38 

 38 

 39 

 40 

 40 

 40 

 40 

 41 

 43 

 44 



