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LESSONS ON COTTON FOR EUEAL COMMON SCHOOLS. 13 
control. If possible, have the pupils collect and preserve for the 
school exhibit local cotton insect pests. 
References.— Farmers' Buls. 500, 501, 512, 606; Office of Experi- 
ment Stations Bui. 33, pp. 317-342. 
LESSON XI. 
Subject. — Cotton diseases. 
Topics for study. — Cotton wilt. Cotton root rot. The control of 
root rot by crop rotation. Boll rot or anthracnose. Cotton rust. 
What should be said in reply to the question, "Do you know of any 
method of cultivation or any fertilizer that will prevent blight in 
cotton?" 
Exercises. — Have the pupils gather data at home concerning the 
extent to which cotton is affected by the above diseases. If possi- 
ble, have the pupils collect and preserve for the school exhibit local 
cotton diseases. 
References. — Farmers' Buls. 555, 586, 625; Bureau of Plant 
Industry Circ. 92; Office of Experiment Stations Bui. 33, pp. 279- 
314. Nearly all the State agricultural colleges in the cotton States 
have one or more bulletins or circulars on this subject. These should 
always be procured and studied in the class. 
LESSON XII. 
Subject. — Harvesting and marketing cotton. 
Topics for study. — The three chief elements to satisfy market condi- 
tions are: (1) A definite and well-established standard, (2) reliable and 
regular quotations based thereon, and (3) adequate storage facilities 
to protect cotton against the weather and country damage, and which 
at the same time places the cotton in position for the issuance of 
warehouse receipts that may be used for obtaining loans at low rates 
of interest. Time for harvesting. Gathering of the crop. Sepa- 
ration of fiber and seed. Baling of the cotton. The nine United 
States official cotton standards for grades in more or less general 
use. How is the grade of a sample of cotton determined ? Reasons 
for protecting baled cotton from the weather. 
Exercises.— Through your pupils and especially those in a cotton 
contest collect data for record blank shown on pp. 14 and 15. 
References.— Department Bui. 62; Farmers' Buls. 302, 364, 591; 
Office of Experiment Stations Bui. 33, pp. 351-360, 381-384; IT. S. 
Dept. Agr., Office of Markets and Rural Organization, S. R. A. 1. 
LESSON XIII. 
Subject. — Cotton seed. 
Topics for study.— Cottonseed products in the feeding of farm 
animals; as a human food; as a fertilizer. 
Exercises. — With the assistance of reference books such as Henry's 
Feeds and Feeding work out with the pupils a balanced ration which in- 
cludes cottonseed meal for a dairy cow, a 1,000-pound steer, and a work- 
