To develop fertilizer prescription equations based on soil test crop response (STCR) approach for rice-rice cropping sequence, trials were conducted at farmer’s field in Karikalampakkam village, U.T. of Puducherry, during 2015-16. Soil test data, yield and nutrient uptake by successive crops were recorded to calculate four basic parameters viz. nutrient required to produce one quintal of rice, contribution of nutrients from fertilizers, contribution of nutrients from soil and contribution of nutrients from FYM used in developing STCR based fertilizer prescription equations. The per cent nutrient contribution of nutrients from soil (CS), fertilizer ( CF) and FYM (CFYM) were found to be 19.15, 45.90 and 23.27 for N, 12.13,40.16 and 26.98 for P2O5 and 13.76, 79.64 and 41.07 for K2O respectively for rice cv. White ponni. The same for the rice cv.ADT 45 were 13.48, 40.46 and 34.26 for N, 15.81, 44.64 and 19.89 for P2O5 and 10.48, 58.64 and 41.51 for K2O respectively. Based on fertilizer prescription equations and nomograms formulated for a range of soil test values and desired yield target for the cropping sequence. It was revealed that under the treatment NPK + FYM @ 12.5 t ha- 1 , 47, 29 and 34 kg ha- 1 for rice cv.White ponni and 41 , 22 and 27 kg ha- 1 for rice cv.ADT 45 of fertilizer N , P2O5 and K2O, respectively could be saved for attaining target yield of 70 q ha- 1 compared to NPK fertilizers alone.
Problem: The correlation co-efficient indicates the nature of association among the different traits, path analysis splits the correlation co-efficient into measure of direct and indirect effects thus providing understanding of the direct and indirect association of each character towards yield.
Methods: An experiment on correlation and path analysis involving thirty F1 and six parents in muskmelon (Cucumis melo L.) was carried out at Department of Horticulture, Adhiparasakthi Agricultural College, Kalavai, Vellore district, Tamil Nadu India.
Results: The fruit yield per plant had exhibited highly significant and positive correlation with individual fruit weight (0.845), fruit diameter (0.656), fruit length (0.536) and flesh thickness (0.503). Path coefficient analysis revealed that the characters viz., fruit weight exerted the highest positive direct effect (1.034) on fruit yield per vine followed by number of fruits per vine (0.497), days to first female flower anthesis (0.088), vine length (0.072) and fruit length (0.070).
Conclusion: The fruit yield per plant can be improved by making selection of these traits in yield improvement programme.
An experiment was conducted to compare the effect of conventional fertilizers and water soluble fertilizers at varying frequency interval of application on yield, quality and nutrient uptake of okra [Abelmoschus esculentus (L.) Moench]. The experiment was laid out in a Randomized Block Design with two control involving ten treatments in a factorial way and was replicated thrice. Among the treatment combinations, the plot receiving daily fertigation of water soluble fertilizers (S 1 F 1) had recorded the maximum fruit length (18.27 cm), fruit girth (7.26 cm), fruit weight (33.35 g), number of fruits plant-1 (43.40), yield plant-1 (808.82 g) and yield hectare-1 (23.25 t ha-1) with minimum crude fibre content (13.25 %).
: An experiment was conducted to compare the effect of conventional fertilisers and water soluble fertilisers at varying frequency interval of application on growth and physiological attributes of okra [Abelmoschus esculentus (L.) Moench]. The experiment was laid out in a Randomised Block Design with two control involving ten treatments in a factorial way and was replicated thrice. Among the treatment combinations, the plot receiving daily fertigation of water soluble fertilisers (S 1 F 1 ) had recorded the maximum plant height at final harvest (136.80 cm), shortest inter nodal length (4.46 cm), maximum leaf area index (2.04) and the highest dry matter production (8.23 t ha -1 ). However, no significant difference could be observed for days to flowering, number of primary branches plant -1 at flowering as well as final harvest and node of first flower appearance.
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