5. Early and late sowing: Three plots are required. Plant the same amount of seed in each and cover to the same depth. Plant No. 1 as early as the soil can be made ready; No. 2, two weeks later; and No. 3, two weeks later than No. 2. Compare the quality and the yield.
6. Effect of sowing clover with grain the first year: Only two plots are required. Sow the same amount of wheat or oats on each plot. On one plot put a moderate supply of red clover and none on the other. Weigh (or estimate), as in Experiment 3 above, the straw and the grain produced on each.
7. Effect of a clover crop on the grain crop succeeding it the following year: The same two plots must be used as in No. 6. When the grain was cut the previous autumn, the plots should have been left standing without cultivation until spring. When the clover has made some growth, spade it down and prepare the other plot in the same way. Rake them level and sow the same amount of grain in each again. Weigh the crops produced on each.
8. Test quality, yield, and time of maturity of several varieties of the same species. Samples of such varieties of wheat as Red Fife, White Fife, Preston, Turkey Red, Dawson's Golden Chaff, White Russian, etc., may be obtained from the Central Experimental Farm at Ottawa, if not available in the district.
9. Effect of different fertilizers (1) on the same crop, (2) on different crops: This can be done either out-of-doors in small plots or indoors, using pots or boxes.
(1) Effect on the same crop: For example, oats on plots four feet square. The following standard fertilizers may be used: stable manure, nitrate of soda, muriate of potash, and bone meal.
On plot No. 1, a dressing of stable manure,
On plot No. 2, four oz. nitrate of soda,
On plot No. 3, four oz. muriate of potash,
On plot No. 4, eight oz. bone meal,