共 27 条
[1]
ARMSTRONG AC, 1980, 3 MIN AGR FISH FOOD
[2]
SOIL STRENGTH AND CROP EMERGENCE IN DIRECT DRILLED AND PLOUGHED CEREAL SEEDBEDS IN 7 FIELD EXPERIMENTS
[J].
JOURNAL OF SOIL SCIENCE,
1982, 33 (04)
:609-622
[3]
Batey T., 1979, Soil and Water, V7, P5
[4]
BERRYMAN C, 1975, TECHNICAL B FIELD DR, V757
[5]
BRIGGS DJ, 1978, N ENGLAND SOILS DISC, V14, P51
[6]
BURTON RGO, 1981, SOIL SURVEY RECORD S, V65, P26
[7]
EAGLE DJ, 1971, MINISTRY AGR FISHERI, V20, P125
[8]
FORBES TJ, 1980, FACTORS AFFECTING PR
[9]
GREEN JO, 1982, SAMPLE SURVEY GRASSL
[10]
GROENEVELT PH, 1979, DRAINAGE PRINCIPLES, V1, P123