FIELD EXPERIMENTS I906-8. lOI 



TO KIEL WILD MUSTARD. 



If one desires to kill wild mustard (not wild radishj it can be 

 readily accomplished in seeded crops without injury to the grai-i 

 or grass by spraying with a 20 per cent solution of iron sulphate. 

 A power sprayer on the same general plan as a potato sprayer 

 should be used. 



The solution is readily made as follows: Empty a 100 pound 

 sack of granulated iron sulphate into an oil barrel (which will 

 hold about 50 gallons). Fill the barrel up with water and stir 

 vigorously for a few minutes until the sulphate goes into solu- 

 tion. The solution can be put into the spray tank and used at 

 once, or it can be kept in the barrel until the desired time for use. 

 Iron sulphate solution is not poisonous and can be handled with- 

 out fear ; white clothing coming in contact with it, however, will 

 be discolored by iron stains. 



The spraying should be made on a calm, bright day after the 

 dew has disappeared. If rain follows within a few hours the 

 spraying is not as effective. The grain fields should be sprayed 

 when the mustard plants are in the third leaf and before the 

 plants are in blossom. If sprayed after the plants are in 

 bloom, it will kill the leaves but will not prevent the forma- 

 tion of seed. 



Lime IN Seeding Down. 



During the past few years in many fields and in different 

 localities marked improvements have been made upon certain 

 crops, particularl}' the yield of legumes, by the liberal application 

 of lime. There are undoubtedly thousands of acres in ]Maine 

 that would be benefited by an occasional liberal application of 

 lime, so far as clover and certain other crops are concerned. 



There is probably no one money crop of greater importance 

 in Maine than the potato. Not only does Aroostook County 

 grow many millions of bushels each year but potato growing is 

 now practiced successfully in other sections of the State on a 

 large commercial scale. It has been learned how to control the 

 ordinary fungus diseases which result in the killing of the tops 

 and the loss of crop from premature ripening, or from rot. In 

 potato culture the most serious obstacle at present is potato scab. 

 This is a fungus disease and seems to grow best in the presence 



