9O KNAPP METHOD OF GROWING COTTON 



on a different soil may not maintain its good 

 qualities. Some varieties are more liable to 

 suffer from insects than others; some are more 

 susceptible to certain diseases than others; 

 some produce fairly well under almost any 

 condition while others produce well under 

 favorable conditions, but fail miserably on 

 unfavorable soils or with unfavorable cli- 

 matic conditions. Some of the long staple 

 varieties which produce a long, strong, silky 

 fiber on moist rich alluvial river bottom soil, 

 fail to produce as good quality of lint or as 

 satisfactory yield per acre when planted on 

 high dry uplands. 



The yieldjsf lint per acre of long staple cot- 

 ton on the same land and with the same treat- 

 ment will be from 30 to 40 per cent, less than 

 short cotton. Long staple cotton is more ex- 

 pensive to harvest on account of the size and 

 shape of boll, making it harder to pick and 

 requires more care and expense in ginning. 

 For the farmer to be justified in growing long 

 staple cotton he should receive at least 

 a premium of 40 per cent, over the price 

 of short cotton. In other words, when 

 short cotton is selling at ten cents per 



