One Thousand Questions in California Agriculture Answered Part 40
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In what part of the State does alfalfa grow best without irrigation?
Obviously the parts which have the greatest rainfall in connection with retentive soil and plenty of summer heat. Alfalfa grows best without irrigation on "sub-irrigated" land where the ground water is sufficiently deep to allow a deep rooting of the plant in free soil and yet not too far down to be readily reached by the deep-running roots.
Good results can be obtained with anywhere from four to ten or twelve feet of soil above water. On shallower soils the plant is apt to be short-lived through root troubles. Unirrigated alfalfa is also reduced by the incursions of gophers which flooding at least once a year will destroy.
Alfalfa and Overflow.
How long can alfalfa stand water without being drowned out? I have a piece of alfalfa on which the water will stand for considerable time in the winter time.
Alfalfa while dormant will endure submergence for several weeks. We do not know exactly how long, but evidently for a considerable period, providing temperatures are too low to invite growth. On the other hand, growing alfalfa is quickly and seriously injured by overflow.
No Nurse-Crop for Alfalfa.
Is it advisable to use oats with alfalfa seeds in seeding for alfalfa?
Some growers of alfalfa here advise it strongly, others advise against it.
The general experience in California is decidedly against using oats, barley, or any other nursecrop with alfalfa. Get the land in the best possible condition and let the alfalfa have the full benefit of it. The ripening of the grain crop will do the young alfalfa plants more harm by robbing them of moisture than any protection which the taller plant can afford.
Reseeding Alfalfa.
This spring I planted alfalfa and only got about half a stand on some of the land. I want to reseed this fall and I thought of putting more seed on the ground and then disc it in. Or would you advise replanting the land? What do you think of putting manure on young alfalfa? Do you think there is any danger of burning it out?
Stir it up with a spring tooth harrow or disc it lightly to make a nice seed bed and then sow your seed as if you were planting alfalfa for the first time. This will give you a good seed bed and will not hurt the alfalfa already growing. Prepare the surface first and then sow, rather than disking in the seed. The manure in moderate application would not burn out the young alfalfa if properly applied after the rains begin.
Taking the Bloat Out of Alfalfa.
Will Italian rye gra.s.s and red top clover be a success under irrigation as cow pasture in this county, either separately or mixed with alfalfa?
To sow in bare spots in the alfalfa, would the rye gra.s.s prevent bloat?
Italian rye gra.s.s and red clover will make good pasturage under irrigation and will make a fight with the alfalfa to the best of their ability. The admixture of rye gra.s.s will reduce the danger from bloating. Red clover will not have that effect, because red clover is a pretty good bloater on its own account. This seems to be the function of all the clovers according to the rankness of their growth at the time that they are grazed.
The Time to Cut Alfalfa.
What is the best period to cut alfalfa hay for cow feed and the best method for curing?
The best time to cut alfalfa is just when new shoots are starting out at the crown. This will give the greatest yield of hay during a season, and the hay will be much more palatable than if the alfalfa is permitted to get well into the blossoming period. The leaves, which are the best part of the hay, also remain on better than if the stems are older. If a person does not care to take the trouble to find out whether the new shoots are coming out or not, he can approximate the time to cut fairly well by waiting until a blossom here and there appears, cutting immediately. It would be difficult to tell on paper exactly when alfalfa was properly cured, as that is a matter of individual judgment. It is usual to cut in the morning and rake into windrows in the afternoon.
With the usual weather in interior California that stage of the curing is completed by that time. The next day it can be gathered into c.o.c.ks and gotten ready to move. That is about all the curing that is done. The size of the windrows depends upon the amount of hay, as thick hay should be put up in small windrows to give plenty of circulation of air. It is considered better also to build the c.o.c.ks on raked land, otherwise the hay lying flat at the bottom will not cure properly and cannot be gathered up clean.
Which Crop of Alfalfa for Seed?
Which cutting of alfalfa should be left for seed bearing?
Which cutting is best for seed depends, of course, on the way the plant grows in your locality. Where it starts early and gives many cuttings in a season with irrigation a later growth should be chosen for seed than with a short season where fewer cuttings can be had. The second cutting is best in many places, but O. E. Lambert of Modesto after thres.h.i.+ng about 30 lots in one year tells us that some growers had left second, some third and some fourth cuttings for seed. He found the second cutting very poor both in yield and grade, much of it not being well filled and the seed blighted, as the growth of hay was too heavy. The seed on third cutting was good both in grade and yield. Much of the seed on fourth cutting was not matured. For good results the stand should be thin. Our drier, heavier lands give the best results, sub-irrigated lands not seeding. All irrigation should stop with the previous cutting for hay.
Siloing First Crop Alfalfa.
How about putting first cutting of alfalfa and foxtail into the silo? Do you think there is any danger of fire in a wooden silo, and do you add salt and water when filling, and how long after it is cut would you advise putting it into the silo?
Put it through the silo cutter as soon as you can get it from the field.
Do not let it cure at all, and be sure to cut and pack well. If at all dry, use water at the time of filling, and some salt then also, if you desire. There is no danger of firing if you put it in with good moisture, and by short cutting and hard packing you exclude the air. If you do not do this you will get a silo full of manure, and possibly have a fire while it is rotting.
Soil for Alfalfa.
What kind of soil is best for alfalfa on a dairy ranch?
An ideal soil for alfalfa is a deep well drained soil into which the roots can run deeply without danger of encountering standing water or alkali. Still we are finding that alfalfa is very successful on soils which are not strictly ideal, providing the moisture is supplied in such a way that the soil shall not be waterlogged nor the water be allowed to remain upon the surface during the hot weather, because this kills the plant.
Handling Young Alfalfa.
I have alfalfa that is doing very well for the first year. My soil is sandy loam with light traces of white alkali, although it does not seem to be detrimental to the growth thus far. I am in the dairy business and will have by winter enough manure to top-dress the field. Would it be good policy to use the manure, or would it be more satisfactory to top-dress with gypsum? Would it injure alfalfa to pasture lightly after the last cutting?
One Thousand Questions in California Agriculture Answered Part 40
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One Thousand Questions in California Agriculture Answered Part 40 summary
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