Kesava Rao, A V RKavitha, SKAU2020-11-132020-11-131999171634https://krishikosh.egranth.ac.in/handle/1/5810155026MScCROP WEATHER RELATIONSllP IN OKRA (Abelmoschus esculentus [L.} Moench), VARIETY 'ARKA ANAMIKA' The experiment was conducted during 1998-1999 at the College of Horticulture, Vellanikkara to find out the crop weather relationships of okra, 'Arka Anamika'. The experiment was laid out in randomised block design with three replications. The treatments consisted of twelve monthly sowing, starting from 21 st April 1998 to 21 st March 1999. Observations on morphological, phenological and yield attributes were recorded during the course of investigation. The daily values of weather elements viz., rainfall, number of rainy days, maximum and minimum surface air temperatures. bright sunshine, mormng and afternoon relative humidity, pan evaporation and wind speed were collected from the Principal Agricultural Meteorological Station, College of Horticulture, Vellanikkara, to work out the crop weather relationships of okra. March, April and September sown crops were significantly superior in terms of fruit yield per plant, number of harvests and crop duration. April sown crop was also superior in plant height, number of nodes on mainstem, and number of primary branches. The fruit yield was significantly associated with the plant height, number of nodes on main stem, number of primary branches, number of harvests and duration of the crop. A multiple regression equation was worked out for predicting fruit yield based on plant characters and it is as follows: Y = 3.08 XI + 11.15 X2 - 210.14 (R2 = 0.94) Where, XI is the duration of the erop in days, X2 is the number of harvests and Y is the yield per plant (g). Based on the association between weather elements and crop yield of okra, a multiple regression equation was worked out and given below: Y = 50.7 XI - 28.69 X2 + 16.11 X3 - 0.058 X4 - 456.29 (R2 = 0.76) Where, Y = yield per plant (g), X, - Minimum temperature (OC) during vegetative phase (6,h to 7th week after sowing), X2 - Maximum temperature (OC) during reproductive phase (6th to 9th week after sowing), X3 - Bright sunshine (h per day) during vegetative phase (4th to 6th week after sowing) and X.4 - Rainfall (mm) during vegetative phase (5th to 6th week after sowing).EnglishThesis