| 137|2140|3617 |5757|1017 |1715 |2732 | 6.6 |59.1 | 15b
| | | | | | | | | | |
29 1-1/4|62.3 | 132|1959|3417 |5376| 836 |1515 |2351 | 6.9 |57.3 | 16a
34 2-1/4|62.6 | 119|2283|4012 |6295|1160 |2110 |3270 | 5.2 |56.9 | 16b
33 3 |62.3 | 119|2222|4027 |6249|1099 |2125 |3224 | 5.6 |55.1 | 17a
35 1-1/4|62.0 | 117|2314|4261 |6575|1191 |2359 |3550 | 6.4 |54.3 | 17b
32 0-3/4|62.7 | 142|2160|3852 |6012|1037 |1950 |2987 | 6.9 |56.0 | 18a
29 1-1/2|62.9 | 181|2029|4164 |6193| 906 |2262 |3168 | 9.7 |48.7 | 18b
| | | | | | | | | | |
32 3 |62.8 | 140|2195|4202 |6397|1072 |2300 |3372 | 6.7 |52.2 | 19
20 0-3/4|62.5 | 70|1332|2074 |3406| 209 | 172 | 381 | 4.9 |64.2 | 20
.. .. | .. | .. | .. | .. | .. | .. | .. | .. | .. | .. |}21
| | | | | | | | | | |}22
--------+-----+----+----+-----+----+-----+-----+-----+-----+-----+-----

Here again, I want the Deacon to look at plot 0, where 500 lbs. Peruvian
guano, sown in October, gives an _increase_ of nearly 14 bushels of
dressed wheat and 1,375 lbs. of straw per acre. On plot 2, where 14 tons
of barn-yard manure have now been applied four years in succession (56
tons in all), there is a little more straw, but not quite so much grain,
as from the 500 lbs. of guano.

"But will the guano," said the Deacon, "be as lasting as the manure?"

"Not for wheat," said I. "But if you seed the wheat down with clover, as
would be the case in this section, we should get considerable benefit,
probably, from the guano. If wheat was sown after the wheat, the guano
applied the previous season would do little good on the second crop of
wheat. And yet it is a matter of fact that there would be a considerable
proportion of the guano left in the soil. The wheat cannot take it up.
But the clover can. And we all know that if we can grow good crops of
clover, plowing it under, or feeding it out on the land, or making it
into hay and saving the manure obtained from it, we shall thus be
enabled to raise good crops of wheat, barley, oats, potatoes, and corn,
and in this sense guano is a 'lasting' manure."

"Barnyard-manure," said the Doctor, "is altogether too 'lasting.' Here
we have had 56 tons of manure on an acre of land in four years, and yet
an acre dressed with 500 lbs. of guano produces just as good a crop. The
manure contains far more plant-