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SWEET-CLOVER SEED
Part I.—Pollination Studies of Seed Production Part II.—Structure and Chemical Nature of the Seed Coat and its Relation to Impermeable Seeds of Sweet Clover
CONTENTS
SWEET-CLOVER SEED
Part I.—Pollination Studies of Seed Production Part II.—Structure and Chemical Nature of the Seed Coat and its Relation to Impermeable Seeds of Sweet Clover
CONTENTS
Part I.—POLLINATION STUDIES OF SEED PRODUCTION.
UNSATISFACTORY YIELDS OF SWEET-CLOVER SEED.
PREVIOUS INVESTIGATIONS OF THE POLLINATION OF SWEET CLOVER.
OUTLINE OF POLLINATING EXPERIMENTS.
STRUCTURE OF THE FLOWERS OF MELILOTUS ALBA.
DEVELOPMENT OF THE FLORAL ORGANS OF SWEET CLOVER.
DEVELOPMENT OF THE OVULES.
STERILITY OF THE OVULES.
DEVELOPMENT OF THE POLLEN.
FERTILIZATION IN MELILOTUS ALBA.
DEVELOPMENT OF THE SEED.
MATURE POLLEN OF SWEET CLOVER.
GERMINATION OF THE POLLEN.
CROSS-POLLINATION AND SELF-POLLINATION OF SWEET CLOVER.
ARTIFICIAL MANIPULATION OF SWEET-CLOVER FLOWERS.[2]
SEED PRODUCTION OF MELILOTUS ALBA UNDER ORDINARY FIELD CONDITIONS.
EFFICIENCY OF CERTAIN KINDS OF INSECTS AS POLLINATORS OF SWEET CLOVER.
PLANTS SUBJECT TO INSECT VISITATION AT ALL TIMES.
PLANTS PROTECTED FROM INSECT VISITATION DURING THEIR ENTIRE FLOWERING PERIOD.
FLOWERS POLLINATED ONLY BY NIGHT-FLYING INSECTS.
FLOWERS POLLINATED ONLY BY DAY-FLYING INSECTS.
PLANTS PROTECTED FROM ALL INSECTS THAT COULD NOT PASS THROUGH A WIRE SCREEN HAVING 14 MESHES TO THE LINEAR INCH.
SUMMARY OF INSECT-POLLINATION STUDIES.
RELATION OF THE POSITION OF THE FLOWERS ON MELILOTUS ALBA PLANTS TO SEED PRODUCTION.
INFLUENCE OF THE WEATHER AT BLOSSOMING TIME UPON SEED PRODUCTION.
INSECT POLLINATORS OF SWEET CLOVER.
EFFECT OF MOISTURE UPON THE PRODUCTION OF MELILOTUS ALBA SEED.
Part II.—STRUCTURE AND CHEMICAL NATURE OF THE SEED COAT AND ITS RELATION TO IMPERMEABLE SEEDS OF SWEET CLOVER.[3]
HISTORICAL SUMMARY.
MATERIAL AND METHODS.
STRUCTURE OF THE SEED COAT.
MICROCHEMISTRY OF THE SEED COAT.
THE SEED COAT IN RELATION TO THE ABSORPTION OF WATER.
A COMPARISON OF PERMEABLE AND IMPERMEABLE SEED COATS.
THE ACTION OF SULPHURIC ACID ON THE COATS OF IMPERMEABLE SEEDS.
LITERATURE CITED.
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