One of the large farmers, owning ten acres, stated that his usual yield of wheat in good season was 160 catty per mow, equivalent to 21.3 bushels per acre. He was expecting the current season not more than one half this amount. As a fertilizer he used a prepared earth compost which we shall describe later, mixing it with the grain and sowing in the hills with the seed, applying about 5333 pounds per acre, which he valued, in our currency, at $8.60, or $3.22 per ton. A pile of such prepared compost is seen in Fig. 126, ready to be transferred to the field. The views show with what cleanliness the yard is kept and with what care all animal waste is saved. The cow and donkey are the work team, such as was being used by the plowman referred to in Fig. 122. The mounds in the background of the lower view are graves; the fence behind the animals is made from the stems of the large millet, kaoliang, while that at the right of the donkey is made of earth, both indicative of the scarcity of lumber. The buildings, too, are thatched and their walls are of earth plastered with an earthen mortar worked up with chaff. In another field a man plowing and fertilizing for sweet potatoes had brought to the field and laid down in piles the finely pulverized dry compost. The father was plowing; his son of sixteen years was following and scattering, from a basket, the pulverized dry compost in the bottom of the furrow. The next furrow covered the fertilizer, four turned together forming a ridge upon which the potatoes were to be planted after a second and older son had smoothed and fitted the crest with a heavy hand rake. The fertilizer was thus applied directly beneath the row, at the rate of 7400 pounds per acre, valued at $7.15, our currency, or $1.93 per ton. We were astonished at the moist condition of the soil turned, which was such as to pack in the hand notwithstanding the extreme drought prevailing and the fact that standing water in the ground was more than eight feet below the surface. The field had been without crop and cultivated. To the question, "What yield of sweet potatoes do you expect from this piece of land?" he replied, "About 4000 catty," which is 440 bushels of 56 pounds per acre. The usual market price was stated to be $1.00, Mexican, per one hundred catty, making the gross value of the crop $79.49, gold, per acre. His land was valued at $60, Mexican, per mow, or $154.80 per acre, gold.