The Bulletin. 



VoLUMt 28. North Carolina State Board of Agriculture. Number L 



Entered at the Raleigh Post-office as second-class mail matter. 



The Bulletin is published monthly by the State Board of Agriculture. 



RALEIGH, JANUARY, 1907. 



MISCELLANEOUS FERTILIZER TESTS COI^DUCTED ON 

 THE DEPARTMENT TEST FARMS DURING 1904, 1905 

 AND 1906. __^ 



BY 



C. B. Williams, Farm Ceops, 



AND 



G. T. Bullock, Superintendent Edgecombe Test Farm. 

 F. T. Meacham, Superintendent Iredell Test Farm. 



The results of intelligently planned and carefully conducted field 

 tests with different crops on any type of soil and using different 

 fertilizing mixtures will, when correctly interpreted, afford pretty 

 reliable information as to the immediate fertilizer requirements of 

 the type of soil on which the experiments were carried on. This 

 data, coupled Avith its history and a knowledge of its total content of 

 the different plant-food constituents, will reveal still more reliable 

 information, not only as to the immediate needs of the soil, but also 

 as to its potentialities and the general cultural and fertilizer treat- 

 ment that should be given it for different crops. 



At the Edgecombe and Iredell farms together, there are at present 

 being conducted each year something like four hundred and fifty 

 fertilizer tests; most of the work up to this time being expended 

 along this line in a study of the fertilizer requirements of corn, cot- 

 ton, cow-peas, peanuts,- and wheat. The results of these tests for the 

 past five years at Edgecombe and the past four years at Iredell are 

 reserved for publication later in the year. At this time only the 

 results of miscellaneous experiments which have been planned prima- 

 rily to study the relative value of different carriers of nitrogen and 

 phosphoric acid for cotton and corn will be considered. The results 

 with a large number of these also have been reserved for future pub- 

 lication and discussion. 



