Abstract
Two sets of pot experiment were carried out, one in the glass-house, and the other out of it in the daytime, to know how the difference of these conditions effect the manurial value of N, P_2O_5 and K_2O of the soil. During the experineut the average temperature was measured higher, and the average humidity, lower in the glass-house thau out of it. The weights of the straws obtained were smaller from the pots in the glass-house than the corresponding pots out of it, but the weights of the grain were, in general, vice versa. No such differences were found in the manurial value of N of the soil as that of P_2O_5 and K_2O of the soil, which were shown remarkably more effective at the pots grown in the glass-house than out of it, showing that the effect of dressing P_2O_5 or K_2O will be greater when the pot experiments are carried out of the glass-house.
