loading...
ARTIFICIAL DRYING OF HAY
Hello, it's time for Ahli Artikel to share an article about Artificial Drying of Hay, please read below.
Artificial Drying of Hay
A high quality of hay usually is achieved when the crop is allowed to dry for a day or less down to a 35 to 40 per cent moisture content in the windrow. Then it is baled, chopped, or left loose, and hauled in for drying down to a moisture content of about 15 per cent. Some hay is dried in batches with heated air, either on a drying platform or in specially equipped drying wagons. Most of the drying is done in a hay-mow by use a forced unheated air supplied by a large blower. A system of ducts or slotted panels placed on a tight barn floor is covered with 8 feet of loose or chopped hay, or 10 to 14 layers of baled hay. Tha air that enters the system is forced upward through the hay. The volume of air should be no less than 2 cubic feet per minute per cubic foot of loose hay and 2 1/2 cubic feet per minute for chopped or baled hay. This requires air-gauge pressure of 3/4 inch to 2 inches of water. Less presure is required for shallower layers of hay or for hay with 30 per cent or less moisture. Drying with heated air is faster than with unheated air, but it involves a fire hazard in mow drying. Prolonged heating of hay at temperatures above 140 degrees F. lowers the digestibility of the proteins.
Freshly cut alfalfa usually contains 75 per cent moisture. The requires the removal of 4800 pounds of water to make one ton of hay that contains 15 per cent moisture. When the hay is allowed to wilt in the field down to 40 to 50 per cent moisture, then only 800 to 1400 pounds of water are removed by the drier. The temperatures permissable range from 250 degrees to 275 degrees F. where the gases contact the driest hay.
The nutrient materials in dehydrated hay are about equal to those in the fresh green material, except for the unavoidable loss of some carotene and the more volatile nitrogen compounds in the drying process. The dehydrated crop is 2 to 2.2 per cent higher in protein and also usually higher in carbohydrates and ether extract than the same crop when sun-cured. The natural green color, an indicator of carotene content, is retained to a greater extent in artificially dried hay.
The cost of hay dehydration has been high enough to preclude its use by the average farmer. Dried meal is used mostly in commercial feed mixtures. Hay dehydration has wider uses where losses from sun curing exceed 25 per cent, especially when hay prices are relatively high.
And that some explanations articles on Artificial Drying of Hay. Hopefully can improve the knowledge of the reader. . .
HAPPY LEARNING. . . .
SOURCE:
Book Principles of Field Crop Production | John H. Martin - Warren H. Leonard | COLLIER Macmillan (1967)
Hello, it's time for Ahli Artikel to share an article about Artificial Drying of Hay, please read below.
Artificial Drying of Hay
A high quality of hay usually is achieved when the crop is allowed to dry for a day or less down to a 35 to 40 per cent moisture content in the windrow. Then it is baled, chopped, or left loose, and hauled in for drying down to a moisture content of about 15 per cent. Some hay is dried in batches with heated air, either on a drying platform or in specially equipped drying wagons. Most of the drying is done in a hay-mow by use a forced unheated air supplied by a large blower. A system of ducts or slotted panels placed on a tight barn floor is covered with 8 feet of loose or chopped hay, or 10 to 14 layers of baled hay. Tha air that enters the system is forced upward through the hay. The volume of air should be no less than 2 cubic feet per minute per cubic foot of loose hay and 2 1/2 cubic feet per minute for chopped or baled hay. This requires air-gauge pressure of 3/4 inch to 2 inches of water. Less presure is required for shallower layers of hay or for hay with 30 per cent or less moisture. Drying with heated air is faster than with unheated air, but it involves a fire hazard in mow drying. Prolonged heating of hay at temperatures above 140 degrees F. lowers the digestibility of the proteins.
Freshly cut alfalfa usually contains 75 per cent moisture. The requires the removal of 4800 pounds of water to make one ton of hay that contains 15 per cent moisture. When the hay is allowed to wilt in the field down to 40 to 50 per cent moisture, then only 800 to 1400 pounds of water are removed by the drier. The temperatures permissable range from 250 degrees to 275 degrees F. where the gases contact the driest hay.
The nutrient materials in dehydrated hay are about equal to those in the fresh green material, except for the unavoidable loss of some carotene and the more volatile nitrogen compounds in the drying process. The dehydrated crop is 2 to 2.2 per cent higher in protein and also usually higher in carbohydrates and ether extract than the same crop when sun-cured. The natural green color, an indicator of carotene content, is retained to a greater extent in artificially dried hay.
The cost of hay dehydration has been high enough to preclude its use by the average farmer. Dried meal is used mostly in commercial feed mixtures. Hay dehydration has wider uses where losses from sun curing exceed 25 per cent, especially when hay prices are relatively high.
And that some explanations articles on Artificial Drying of Hay. Hopefully can improve the knowledge of the reader. . .
HAPPY LEARNING. . . .
SOURCE:
Book Principles of Field Crop Production | John H. Martin - Warren H. Leonard | COLLIER Macmillan (1967)
 | |
| Picture of Artificial Drying of Hay |
loading...