文档介绍：RECENT DEVELOPMENTS IN
AGRlC ULTU RAL MACH INE RY
T . W . Edminster and H . F. Miller. Jr .
United Stater Deparfmenf of Agriculture. Belfrville. Maryland
Page
I . Introduction ..................171
I1. Developments in Tillage and Seedbed Preparation .......173
A. Conventional Equipment and Practices ........173
B . Special Tillage Equipment and Practices ........176
C. Seedbed Finishing Tools ............182
I11 . Developments in Planting Equipment ..........182
A. Row-Crop Equipment .............183
B . Grain and Seed Drills .............187
C . Aerial Seeding and Fertilizing ...........189
IV. Developments in Cultivating Equipment ..........190
A . Mechanical Cultivation .............190
B . Flame Cultivation .............. 192
C . Equipment for Applying Chemical Herbicides ......192
D . Thinning Equipment .............192
V . Developments in Spraying and Dusting Equipment .......193
A . General Developments .............193
B . Spraying Equipment ..............194
C . Dusting Equipment ..............195
VI. Developments in Harvesting Equipment .......... 196
A. Forage Harvesting Equipment ...........197
B . Corn Harvesting Equipment ...........202
C. Grain, Legume. and Grass Seed Harvesting Equipment ....204
D . Cotton Harvesting Equipment ...........207
E . Dry Bean and Pea Harvesting Equipment ........209
F. Vegetable Harvesting Equipment ..........211
G. Root Crop Harvesting Equipment ..........214
H . Tree Nut and Fruit Harvesting Equipment .......218
I . Miscellaneous Crop Harvesting Equipment .......223
VII. Conclusions ..................226
References ..................226
1 . Introduction
Development of agricultural machinery results from the joint efforts
and activities of farmers. engineers. agricultural scientists and machinery
171
172 T. W. EDMINSTER AND H. F. MILLER, JR.
manufacturers. Most rapid progress is made when all bine
their ef