. Circular. Agriculture; Agriculture -- United States. CROPPING SYSTEMS FOR THE BLACK LANDS OF TEXAS. 19 allowed to mature. In either event the sweet ehiver is expected to grow again and make either a crop of hay or some grazing b(>i"ore fall. After the wheat, such legumes as cowpeas, soy beans, beggarweed, and guar' will be planted in rows 21 to 3 feet apart and so cultivated as to conserve moisture. The rainfall is so limited and uncertain that satisfactory results arc seldom obtained from planting broadcast after grain or between the corn rows at the last cultivation. MODIFICATION O
. Circular. Agriculture; Agriculture -- United States. CROPPING SYSTEMS FOR THE BLACK LANDS OF TEXAS. 19 allowed to mature. In either event the sweet ehiver is expected to grow again and make either a crop of hay or some grazing b(>i"ore fall. After the wheat, such legumes as cowpeas, soy beans, beggarweed, and guar' will be planted in rows 21 to 3 feet apart and so cultivated as to conserve moisture. The rainfall is so limited and uncertain that satisfactory results arc seldom obtained from planting broadcast after grain or between the corn rows at the last cultivation. MODIFICATION OF A RO- TATION COMMON IN THE SOUTH. A rotation tending to maintain fertility, in use in the more humid sections, is (1) corn with cowpeas planted between the rows at the last cultivation, (2) cotton,- and (3) oats fol- lowed by cowpeas sown broadcast. This rotation, omitting the cowpeas and often with the oats left out, is the one that has prevailed in the black lands from the be";inning and that has brought about the decline in the productiveness of the soils. In fact, those who realized the advisability of including legiunes in the rotation failed in their ef- forts to grow them because of the limited and uncer- tain rainfall more than from any other cause. In the last few years, however, many farmers have learned that they can grow cowpeas ((uite successfully by planting them in alter- nate rows with corn, or in rows after oats, and cultivating them as fre(iuently as they would corn. Those who have tried this plan are well pleased with the results. They have not only produced a cro]) of cowpeas, but by planting the corn twice as thick in the row as ordi- narily they have secured as good and in most instances better yields of corn than from similar areas of the same type of soil upon wliich ' Guar is mentioned on account ot its promise as a soil builder. Its value as a forage crop in this country is doubtful. »In many localities this rotation is modified by transposing
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