Browsing by Author "Kumari Swadija, O"

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Acidity amelioration and nutrient management practices for mitigating yield constraints of rice in Vaikom Kari
(Department of Agronomy, College of Agriculture, Vellayani, 2017) Devi, V S; Kumari Swadija, O
Agronomic package for container grown elephant foot yam
(Department of Agronomy, College of Agriculture, Vellayani, 2017) Limisha, N P; Kumari Swadija, O
Influence of graded levels of N, P and K on growth and yield of horse gram
(Kerala Agricultural University, 1988) Kumari Swadija, O; Chandrasekharan, P; Nair, V M
Integrated nutrient management for arrow root (Maranta arundinacea L.) under partial shade
(Department of Agronomy, College of Agriculture, Vellayani, 2000) Veena Vidyadharan; Kumari Swadija, O
A field experiment was conducted in the Instructional Farm, College of Agriculture, Vellayani from June 1999 to March 2000 to study the efficacy of conjoint use of varying levels of organic manure and fertilizers for yield improvement of arrow root under partial shade. The treatments included three levels each of FYM (10, 15 and 20 t ha"), Nand K (40,80 and 120 kg each of Nand K20 ha-I). A uniform dose of 50 kg P20S ha-I was applied to all the plots. The experiment was laid out in a 33 partially confounded RBD confounding MNKin replication I and M2NK in replication 11. Application of FYM had profound influence on growth characters like plant height, sucker number, leaf number and dry matter production. Nitrogen also exerted significant influence on growth characters like plant height, sucker number, leaf area index and dry matter production. The effect of K was significant on dry matter production at the harvest stage and 80 kg K20 ha-I was found sufficient for higher dry matter production. Number of rhizomes per plant at harvest showed an increasing trend with increasing levels of FYM. Girth of rhizome and weight of rhizome per plant were influenced by the combined application of FYM and fertilizers. Higher rhizome yields were realised at the medium levels of FYM (15 t ha-I), N (80 kg ha") and K (80 kg K20 ha-I). The combined application of 20 t FYM, 40 kg Nand 120 kg K20 ha-I or 20 t FYM and 80 kg each of Nand K20 ha-I produced higher yields closely followed by lOt FYM + 120 kg N + 80 kg K20 ha"l. FYM @ 15 t ha', N @ 80 kg ha"1 and K @ 80 kg K20 ha"1 produced higher utilization index. The highest starch content and the lowest crude fibre content of the rhizome were recorded by the highest level of K (120 kg K20 ha ") tried while the highest protein content was recorded by the highest level of FYM (20 t ha') and N (120 kg ha ") applied. Application of FYM @ .20 t ha"1 enhanced the uptake of N, P and K as well as the post-harvest soil nutrient status. For higher N uptake, application of 80 kg N ha"1 was found sufficient. Uptake of K as well as available K in the soil after the experiment showed an increasing trend with increasing levels of K application. The study indicated that combined application of lOt FYM, 120 kg N and 80 kg K20 hal along with 50 kg P205 ha"1 is most advantageous for arrow root intercropped in coconut garden which resulted in the highest net income and benefit-cost ratio in the laterite soils of Vellayani.
Integrated nutrient management for coleus
(Department of Agronomy, College of Agriculture, Vellayani, 2001) Archana, B; Kumari Swadija, O
An experiment was conducted at the Instructional Farm attached to the College of Agriculture, Vellayani during October 2000 to March 2001 to study the combined effect of organic manures, fertilizers and biofertilizer on the productivity and quality of coleus, to find out the feasibility of reducing the present recommended dose (RD) of fertilizer P and to workout the economics of cultivation. The treatments included different organic manures (RD as FYM, RD as composted coir pith (CCP), 1/2 RD as FYM + 112 RD as neem cake (NC) and 112 RD as CCP + 112 RD as NC on N equivalent basis), levels of P (30 and 60 kg P20S ha-I) and biofertilizer (with and without AMF inoculation). The experiment was laid out as a 4 x 2 x 2 asymmetrical confounded factorial RBD confounding ABC in all replications. A uniform dose of 60 kg Nand 100 kg K20 ha-I was applied to all the plots. Different organic manures had significant influence on plant height, plant spread and leaf number during later stages of growth. Significant influence of organic manures was observed on leaf area index (LAI), crop growth rate (CGR) and net assimilation rate (NAR) at all growth stages. The treatments, FYM and 112 FYM + 112 NC recorded superior values of growth characters. FYM was found to be the best source of organic manure for higher dry matter production irrespective of growth stages. In general, CCP was found inferior to other sources In its effects on growth characters. An increase in applied P from 30 to 60 kg P20S ha-I did not produce any significant influence on growth characters except CGR, NAR and tuber i bulking rate (BR). Application of 60 kg P20S ha" registered higher values of CGR, NAR and BR during peak vegetative stage of the crop. Inoculation with AMF failed to produce any significant response in terms of growth characters except CGR and NAR. FYM as the source of organic manure had ,positive influence on yield components like number and weight of tubers and weight of marketable tubers per plant. But CCP as the organic manure recorded lower values of the yield components. The yield components were not influenced by increased rate of P application. Inoculation with AMF was also not beneficial with respect to its effect on yield components. Different organic manures exerted noticeable difference in tuber yield. The highest tuber yield was produced by FYM and the lowest by CCP. The effects of the treatments, 112 FYM + 112 NC and 112 CCP + 1/2 NC were on par and in between FYM and CCP. Enhancement of applied P or inoculation with AMF did not help in increasing tuber yield. The quality parameters of the tuber such as starch content, protein content and keeping quality were not affected by the treatments. The treatments, FYM and 112 FYM + 112 NC registered higher nutrient uptake. Uptake of P increased with increase in applied P but the uptake of N -1 .. and K were not influenced by P levels. AMF inoculation did not produce any significant effect on nutrient uptake. Available N, P and K contents of the soil after the experiment were not influenced by the treatments. Net income and BCR were maximum when FYM was used as the organic manure. CCP recorded the lowest net income. The study clearly revealed that the present recommended dose of 60 kg P20S ha-I can be reduced to 30 kg P20S ha-I along with 60 kg Nand 100 kg K20 ha-I combined with lOt ha-I of FYM. FYM was found to be the best source of organic manure. If there is scarcity of FYM, half the dose of FYM can be substituted with NC on N equivalent basis. Wherever CCP is easily available, FYM can be substituted with CCP and NC in equal proportion.
Nutrient management for productivity enhancement of cassava var. Vellayani hraswa in lowlands
(Department of Agronomy, College of Horticulture, Vellayani, 2018) Pooja, A P; Kumari Swadija, O
Nutritional requirement for horsogram (Dolichos biflorus Roxb.)
(Department of Agronomy, College of Agriculture, Vellayani, 1984) Kumari Swadija, O; Chandrasekharan, P
A field experiment was conducted at the college of Agriculture, Vellayani during 1932 to study the effect of three levels each of nitrogen (0.15 and 30 kg/ha), phosphorus (0. 25 and 50 kg P2Os/ha) and potassium (0.20 and 40 k2O/ha) on growth, yield and quality of horsegram. The trial was conducted as a 3 partially confounded factorial experiment with two replications. Application of nitrogen phosphorus and potassium had profound influence on all growth characters like height of plant* number of functional leaves and branches per plant and leaf area index. The highest nodule count was obtained by the application of 15 kg N 25 kg Pg 5 and 20 kg KO per hectare while tho dry weight of nodules per plant was maximum at 15 kg N 50 kg 40 kg K2O per hectare
Production technology for organic coleus
(Department of Agronomy, College of Agriculture, Vellayani, 2012) Atul Jayapal; Kumari Swadija, O
Soil test crop response studies in cassava in laterite soils of Kerala
(Department of Agronomy, College of Agriculture, Vellayani, 1997) Kumari Swadija, O; Sreedharan, C
Strategies for off season production of coleus in the Southern zone of Kerala
(Department of Agronomy, College of Agriculture, Vellayani, 2014) Anju, V S; Kumari Swadija, O
A field experiment entitled “Strategies for off season production of coleus in the southern zone of Kerala” was undertaken at Instructional Farm, College of Agriculture, Vellayani from November 2013 to May 2014. The objectives of the study were to fix the ideal time of planting and nutrient management for off season production of coleus var. Suphala and to work out the economics of cultivation. The treatments consisted of four dates of planting (d1-November 15; d2-December 1; d3-December 15 and d4-January 1) and three nutrient management practices (n1-Recommended dose - 60:60:100 kg NPK ha -1 through fertilizers; n2-RD through organic manures -6 t farmyard manure + 3 t coir pith compost + 3 t wood ash per ha+ PGPR mix1 and n3-Modified nutrient dose -60:30:120 kg NPK ha -1 through fertilizers). The experiment was laid out in split plot design assigning dates of planting in main plots and nutrient management practices in sub plots with four replications. A uniform dose of FYM @ 10 t ha-1 of and of neem cake @ 1 t ha-1 was applied to all plots. Among four dates of planting tried, planting on November 15 (d1) recorded taller plants, higher number of branches and leaves per plant and higher leaf area index. Yield components like number and weight of tubers per plant were maximum when planted on November 15 (d1) followed by planting on December 1 (d2). Number and weight of marketable tubers per plant showed a decreasing trend when planting was delayed beyond November. The tuber yield also exhibited a similar trend recording the highest tuber yield of 14.89 t ha-1 for November 15 planting and the lowest tuber yield of 10.71 t ha -1 for January 1 planting. The tuber yield was significantly and positively correlated with the total rainfall received during the cropping period. Planting on November 15 recorded the highest utilization index. Total dry matter production and uptake of N, P and K were maximum when the crop was planted on November 15 and it showed a declining trend due to late planting. But quality attributes of tuber were not significantly influenced by date of planting. The highest net income (Rs.167525 ha -1) and BCR (1.84) were obtained by planting on November 15, which decreased with delay in planting. Modified nutrient dose of 60:30:120 kg NPK ha-1 through fertilizers (n3) significantly promoted all the growth characters. Higher number and weight of tubers as well as marketable tubers per plant were recorded by the same treatment which resulted in the highest tuber yield of 14.36 t ha -1. The same trend was noticed in the case of total dry matter production, utilization index, uptake of nutrients and starch content of the tuber. Significantly higher net income (Rs.163900 ha -1) and BCR (1.84) were recorded by the modified nutrient dose (n3) followed by recommended dose of nutrients through fertilizers (n1). Regarding interaction effects, November 15 planting with modified nutrient dose recorded significantly taller plants with higher leaf area index during later stages of crop growth. Similarly, the same interaction produced the highest number of marketable tubers per plant and tuber yield. November 15 planted crop with modified nutrient dose registered the highest net income and benefit cost ratio. Soil analysis after the experiment indicated higher pH and organic carbon contents and lower available N, P and K contents in organically manured plots than fertilizer applied plots. The study revealed that for off season production of coleus var. Suphala in the southern zone of Kerala, the ideal time of planting is November 15 which recorded higher tuber yield, net income and benefit cost ratio. Modified nutrient dose of 60:30:120 kg NPK ha-1 through fertilizers + FYM @ 10 t ha-1 + neem cake @ 1 t ha-1 can be recommended for the crop for getting higher tuber yield, net income and benefit cost ratio.
Tillage and nutrition for productivity enhancement in tannia (Xanthosoma sagittifolium"(L.) schott)
(Department of Agronomy, College of Agriculture, Vellayani, 2017) Atul Jayapal; Kumari Swadija, O