Soils and fertilizers . ts Buckwheat Cowhom turnips Mustard Rape summer winter winter sunmier summer summer sunuuer one year at leastone year at leastone year at leastone year at least winter fall or early spring fall and summer summer summer summer and fall Northern statesNorthern and southern statesMiddle and southern statesMiddle and southern statesMiddle and southern statesMiddle and southern statesSouthern states Northern states Northern states Northern and southern states Northern and southern states Northern and middle statesNorthern and middle statesNorthern statesNorthern statesNorthe
Soils and fertilizers . ts Buckwheat Cowhom turnips Mustard Rape summer winter winter sunmier summer summer sunuuer one year at leastone year at leastone year at leastone year at least winter fall or early spring fall and summer summer summer summer and fall Northern statesNorthern and southern statesMiddle and southern statesMiddle and southern statesMiddle and southern statesMiddle and southern statesSouthern states Northern states Northern states Northern and southern states Northern and southern states Northern and middle statesNorthern and middle statesNorthern statesNorthern statesNorthern statesNorthern states A soil that has become less productive under cultivation,and that must be improved before profitable crops can begrown, receives more benefit from the use of legumes thanfrom any other crop. The legume to use is naturally the onebest adapted to the region in which the soil is located. The perennial or biennial legumes are too slow of growthreally to be considered green-manure crops. They are hke. PiaATE XVI. Soil Covers. — Cover-crops may consist merely ofweeds allowed to grow voluntarily, as shown in the upper figure, or ofgrain or other planted crops, as shown in the lower. GREEN-MANURES 239 timothy and other grasses and can well be grown for hay, onlythe sod being plowed under. Only in the case of very muchrun down soils are these crops plowed under. Crimsonclover is an annual, and in the central and southern statesmay be sown in the fall and plowed under in the late spring,thus making use of a period of the year when the ground isleast Ukely to be occupied by a crop. Cowpeas, soy beansand field peas must be raised during the summer promises to be a satisfactory green-manure for winteruse in the northern states, when the cost of seed becomesless than it is at present. Where it is desired to keep a crop on the soil during theautumn, winter and spring, for the purpose of utilizing thesoluble plant-food material, the cereals, especially r
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Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectfertilizers
