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CORN AND SOYBEANS 



Don't rush corn and soybean planting. Wait until the soil warms up. If you plant now, the 

 seed- -even though properly treated with a protective fungicide such as captan or thiram-- 

 will be in cold, wet soil, and sprouting will be delayed. This gives seed decay and pre- 

 emergence seedling blight fungi, such as Pythium, a chance to "get in their licks." 



After the soil warms up, the seed will germinate more rapidly, stands will be more uniform, 

 plant vigor and yields will be higher, and the possibility of having to replant will be 

 greatly decreased. 



The period during which a seed germinates and the seedling becomes established is very 

 critical in the life of a corn or soybean plant. Avoid deep planting, poor seedbed prepara 

 tion, and cold or wet soils (below 50° to 55° F. for corn and about 60° F. for soybeans). A 

 soil temperature below 50° to 55° F. favors most soil-borne fungi, causing seed rot and 

 seedling blights. 



GENERAL INFORMATION 

 TANK-MIXING AGRICULTURAL CHEMICALS 



There is considerable interest in mixtures and combinations of herbicides, insecticides, 

 and liquid fertilizers. For use limitations on mixtures, read all labels and follow the 

 one with the most-severe restrictions. 



There are both tank-mix and formulated mixtures. While Sutan-atrazine is only a tank -mix, 

 other herbicide combinations (such as Ramrod -atrazine and Lorox-Ramrod) are available as 

 both tank and formulated mixes. With tank mixes, you can vary the ratio to meet local con 

 ditions. But there may be problems caused by inefficient agitation, insufficient water 

 volume, and lack of an emulsifying agent. Normal spraying requires approximately 2 gallon 

 of spray volume for each pound of wettable powder, to keep a good dispersion. 



Wettable powders (WP) require continuous agitation. Mechanical or hydraulic- jet agitation! 

 is preferable to normal by-pass agitation. 



■ 



In mixing, first have some liquid carrier in the tank. Never place concentrated chemicals 

 in an empty tank. Also, add wettable powders before adding emulsifiable concentrates (EC) 

 spray oils, or other additives. Always premix wettable powders before adding them to the 

 tank. 



Some chemicals are formulated as "fertilizer grade," with extra emulsifier. But if the 

 chemicals you use are not this way, adding emulsifier can sometimes help. Compex (Colloid 

 Products Corporation) is a spray tank adjuvant formulated to help in preparing chemical 

 blends. Use it at the rate of 3 pints per 100 gallons of spray (1/2 teaspoon per pint). 



Check compatibility by mixing small amounts first. To do this, a set of measuring spoons 

 and a few quart jars are quite handy. When checking compatibility, remember that 1 tea- 

 spoonful per pint equals 1 quart per 25 gallons; also, that 1 level teaspoonful of wettabl 

 powder per pint equals 1 pound per 25 gallons. Therefore, if your mix calls for a 25- 

 gallon solution with 2 quarts of emulsifiable concentrate (EC) and 3 pounds of wettable 

 powder (WP) , your conversion is 2 teaspoons of EC and 3 level teaspoons of WP per pint of 

 carrier (water or liquid fertilizer) . 



Procedure : (1) Calculate conversion factors for 1 pint of mix. (2) Place 1 pint of 

 carrier in each jar and label the jars "A" and "B." (3) Add one -half teaspoon of adjuvant 

 to jar marked "A" (adjuvant added). (4) Add the proper amount of chemicals to both jars 

 (WP's first). (5) Close the jars and shake or invert to mix. (6) Allow to set and observ 

 the results. 



