SEASONAL INFLUENCE ON NUT YIELD AND BARRENNUT PRODUCTION IN TALL AND HYBRID COCONUT

摘要

The barren nut production is common in coconut palms especially in those palms grown under rainfed condition without manuring. The barren nut production accounts for not less than three per cent of total annual gross yield (Gangolly and Nambiar, 1953). The types of barren nut differed based on certain morphological features. Menon and Pandalai (1958) classified the barrennuts into five distinct types. Among the five types of barren nut, nut with cracking is the most frequently occurring one. The production of barren nut fluctuates from year to year and within the year it was found to be high during the peak bearing period and low during the lean period. The preliminary work undertaken by Gangolly -and Nambiar (1953) showed that the production of barren nut was frequently observed in trees yielding an average of 40 to 60 nuts. However, very little information is available on seasonal variation on nut yield and barren nut production with reference to rainfall and temperature and hence the present study was under taken.