GARDEN PLOT EXPERIMENTS 



127 



(see directions in Chapter XX). Let two rows be treated 

 and two rows be untreated. The liming mentioned in number 

 nine may be the one row of each of these pairs. 



11. Effects of Dust Mulch. — Compare two rows of corn 

 or potatoes with and without the dust-mulch method of culture. 



12. Firming the Soil. — At planting time let the seeds in 

 one row of the garden be r wv^jssrjrSivT ' i 

 pressed firmly against the 

 soil by tramping on the 

 row after planting. Let 

 the adjacent row be 

 planted in loose soil with- 

 out firming. 



13. Testing the Treat- 

 ment for Codlings-Moth. 

 — Spray one apple tree of a 

 certain variety for Codling- 

 moth and apple scab, using 

 Bordeaux mixture and 

 Paris green at the time the 

 petals fall. Let another 

 tree remain unsprayed and 

 compare the results by 

 counting or measuring the 

 number of sound or un- 

 sound apples on the trees 

 when ripe. Calculate the 

 cost of spraying and deter- 

 mine the relative value of 

 the crops. This trial may be made by one or more young 

 people in their home orchards. 



14. Oat Smut. — Treat a pint of seed oats by soaking in 

 a solution of formalin, as described in another exercise. Plant 

 the treated oats in one row of the garden and a like quantity 

 of untreated seed in a parallel row. Compare the results 



Fig. 74. — ^Each tomato plant maybe re- 

 duced to a single main stem and tied to a 

 single stake for support. Some pruning of the 

 "suckers" and side branches willinerease the 

 rapidity of ripening. (U. S. D. A.) 



