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LESSONS IN AGRICULTURE 



an acre free from weeds, what would be the gain per 

 acre? 



5. What would be the gain on a 24-acre field ? 



6. Is the quality of 

 the corn from a weedy 

 field ever so good as 

 that from a clean field? 

 Why? 



7. Suppose clean 

 oats produce 65 bu. per 

 acre and weedy oats 

 produce only 48 bu. per 

 acre, with oats at 30 

 cents per bushel, what 

 is the loss from weeds? 

 What is the loss on a 

 16-acre field? 



8. Are oats grown in 

 a weedy field as good in 

 quality as clean grown 

 oats ? Explain. 



9. Give several rea- 

 sons for weedy oats. 

 Can weeds in oats be 

 easily destroyed after 

 the oats are sown? a, 



10. Will crop rota- 

 tion prevent weeds in oats? What is a good crop for 

 oats to follow? Why? 



11. A yield of 300 bu. of potatoes per acre would 

 be an excellent crop. The land would need to be well cul- 



Fio. 89. WEED LESSON. 

 Amaranth ; b, crab grass ; c, rag 

 weed ; d, pigeon grass. 



