कृषि-पाराशर (महर्षि पराशर - प्राचीन भारतीय कृषि, मृदा-परीक्षण, वर्षा-पूर्वानुमान व बीज-संस्कार)

KṚṢI-PARĀSARA . 67.
39-40. The seventh day of the dark half of the moon in Māgha
and also in Phālguna, the third day of the moon in the bright half
of Caitra, first day of Vaiśākha—(if there be) a violent wind or a
shower with lightning in these periods, then the rainy season becomes
agreeable, and the earth full of crops.
41. There will be (continuous) rainfall up to the end of Kārtika
if, on the seventh day of the dark half of the moon in the Svāti
Nakṣatra in Māgha, there be a shower, gale, thundering of clouds
surcharged with water, and if the sky, agitated by flashes of lightning,
has the moon, the sun and the stars enveloped (in darkness).
42. If, in the month of Māgha, there be incessant downpour
with hails, in Phālguna wind blows with clouds, in Caitra the sky is
overcast, in Vaiśākha there is constant shower of hail and very
scorching sunshine in Jyaiṣṭha, then it rains till the sun marches on to
Libra.
Now the knowledge of rainfall in Phālguna
43. If, during the sun's stay in Aquarius, there be conjunction
with Rohiṇī, then there will be worst, bad, middling, great and very
great showers of water (respectively) on the five days beginning with
the fifth lunar mansion.
Now the knowledge of rainfall in Caitra
44-45. If the first day of the bright half of the moon in Caitra
be a Sunday, then there will be moderate rainfall in that year;
(if it be) on Monday, (then) the surface of the earth will be entirely
flooded by intense, incessant and torrential downpour. (If it be) on
Tuesday, (then) there will not be sufficient rainfall; (if it be) on
Wednesday, Thursday and Friday, (then) there will be rejoicings due
to an abundance of crops, ; (if it is) on Saturday, (then) even the
ocean dries up and the earth becomes invisible by clouds of dust.
46. Under (the Nakṣatra) Citrā, in the earlier part of Caitra, the
earth (gets) moderate rainfall, in the latter (part) (rainfall will be)
scanty and not sufficient, in the middle (part) the earth (gets) heavy
downpour.