Browsing by Author "Santhakumari, G"

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Effect of copper and zinc on the nutrition of rice plant
(Kerala Agricultural University, 1983) Sasidhar, V K; Hassan, M A; Santhakumari, G
Effect of irrigation and mulching oh the growth and yield of pineapple (Ananas Comosus L.)
(Kerala Agricultural University, 1988) Kuruvilla Varughese; Pillai, G R; Jose Mathew; Santhakumari, G; Gopi, C S
A field experiment was conducted in a sandy loam soil of the Agronomic Research Station, Chalakudy, Kerala for four years from 1981 to 1985 to study the response of irrigation and mulching on tha growth and yield of pineapple. Both irrigation and mulching influenced the fruit yield significantly. The study revealed that irrigating pineapple during summer months at 0.6 IW/CPE ratio (5 cm depth of water) and mulching the crop with dry leaves @6000 kg/ha was optimum. It requires fivato six irrigations during the dry months at an interval of 22 days.
Effect of water management and lime on iron toxicity and yield of paddy
(Kerala Agricultural University, 1996) Durga Devi, K M; Gopi, C S; Santhakumari, G; Prahhakaran, P V
A field experiment was conducted during rabi and summer seasons of 1991-92 in paddy fields of Chalakudy Command Area, in order to study the effect of a single top dressing of lime on iron toxicity and yield of paddy under different water management practices. Considerable reduction in Fe' * concentration could be noticed in soil as well as plant during the period of panicle initiation when lime was applied entirely as one top dressing (at 20 days after transplanting or 30 days after sowing). Application of lime 9 500 kg ha' as single top dressing resulted significantly higher grain and straw yields of paddy as compared to lime >8> 300 kg ha ', 900 kg ha ' and no lime application. The economic level of lime for getting maximum profit from grain and straw was 568 kg ha ' and 635 kg ha1 for the rabi and summer crops respectively.
Influence of summer cropping and fallowing on fertilizer use efficiency and productivity of rice
(Kerala Agricultural University, 1996) Jose Mathew; Reena Mathew; Kuruvilla Varughese; Santhakumari, G; Pillai, G R
Irrigation and mulching in nendran banana
(Kerala Agricultural University, 1989) Pillai, G R; Kuruvilla Varughese; Jose Mathew; Santhakumari, G
Irrigation management on yield stabilization and annual productivity of coconut
(Kerala Agricultural University, 1996) Jose Mathew; Piilai, G R; Santhakumari, G; Kuruvilla Varughese
The impact of irrigation water management, with the treatments linked to climatic parameters, in coconut on inter-harvest yield variation and annual productivity was studied in a five-year field experiment.Yields got stabilized with adequate irrigation showing minimum fluctuation among harvests during different periods of the year.The data on per cent contribution of individual harvests, standard deviation, yield range between harvests and coefficient of variation clearly supported this argument. Based on yield trends and irrigation water consumption, irrigation at 50 mm CPE with 50 mm water was suggested as the best schedule for irrigating coconut during dry spell.
Morphological and physio chemical properties of Karapadom soils of the Kuttanad region of Kerala State
(Division of Agricultural Chemistry, College of Agriculture, Vellayani, 1975) Santhakumari, G; Aiyer, R S
A study was mads on ths morphological and physico-chemical properties of 3 profiles of the Karapadom soils of the Kuttanad region. The study revealed many salient features of Karapadom soils The main conclusions drawn from the results obtained are summarised as follows 1. The soils can be texturally classified as clay, loamy sand, silt and silty loam* Maximum percentage of clay was recorded by the top layer of Vettikaripadom, lowest layer of Mathurpadom and sub-surface layer of Mathurvadakke padom profiles. 2. In Mathurpadom and Mathurvadakke padom absolute specific gravity Increased with increase in depth and there is no general trend in the value of apparent density. 3. Mathurpadom and Mathurvadakke padom profiles are strongly acidic when compared to Vettikaripadom which is situated on the western most boundary of Kuttanad near Punnapra. 4. Electrical conductivity increased as depth of the profile increased in Mathurpadom and Mathurvadakke padom profiles. 5. In the three profiles, the organic carbon varies from 0.79 to 4.09 per cent and nitrogen varies from 0.11 to 0.3 per cent. She carbon nitrogen ratio of the profiles varies from 6.58 to 18.33
Optimising the irrigation water requirement of cassava
(Kerala Agricultural University, 1988) Jose Mathew; Kuruvilla Varughese; Pillai, G R; Santhakumari, G
A two year study was undertaken at the'Agronomic Research Station, Chalakudy during 1982-'83 and 1983-'84 to formulate a suitable water management schedule which optimises the irrigation water requirement of cassava planted during November- December months. Tha trial consisted of 12 irrigation treatments (unirrigated and irrigated at 75 mm and 100mm CPE, through all furrows and alternate furrows and with varying quantities of irrigation water (Recommended (50 mm) and its 3/4 and 1/2 depths) in different combinations. Two treatments having the added advantages of economy in water and labour viz., (i) All furrow irrigation with 1 /2 water (25 mm) at 100 mm CPE and (ii) Alternate furrow irrigation alternatively with 25 mm water at 75 mm CPE were identified, the first schedule approximately requires seven irrigations at an interval of 27 days whereas thjsacond schedule requires nine irrigations at an interval of 20 days.
Production potential and economics on seven rice based crop rotations
(Kerala Agricultural University, 1978) Balachandran Nair, G K; Sasidhar, V K; Santhakumari, G
Response of amorphophallus to irrigation and mulching
(Kerala Agricultural University, 1988) Jose Mathew; Kuruvilla Varghese; Pillai, G R; Santhakumari, G
A study was undertaken in the sandy loam soil of the Agronomic Research Station, Chalakudy during 1933-'84 and 1984'85 to know the response of December January planted amorphophallus to irrigation and mulching. Four irrigation (no irrigation and irrigation at 0.3, 0.6 and 0.9 IW/CPE ratios) and four mulching (no mulching and mulching with dried leaves, paddy waste end coir dust) in factorial combinations constituted the treatments. From the results of the study, it was found that amorphophallus planted in December-January has to be irrigated at 0.9 IW/CPE ratio with 50 mm wator through furrows in summer season for higher corm production. It requires about 10 irrigations at an approximate interval of 12 days in non-rainy periods. The study also revealed the importance of mulching with organic waste materials like dried leaves, paddy wasta and coir dust in boosting corm yield in irrigated amorphophallus.
Response of cowpea to irrigation and phosphorus
(Kerala Agricultural University, 1994) Santhakumari, G; Pillai, G R; Kuruvilla Varughese; Jose Mathew
Investigations carried out in the rice fallows of the Agronomic Research Station, Chalakudy revealed that grain and green pod yields of cowpoa variety Kanakamani were significantly increased by irrigation and application of phosphorus. Irrigation at critical stages of branching, flowering and pod formation and irrigation at 1W/CPE = 0.75 were better schedules for the production of grain and green pods. The economic optimum dose of phosphorus was worked out to 30.0 and 36.8 kg P2C>5 ha for the production of grain and green pods, respectively.
Response of nendran banana to different levels of N, P and K
(Kerala Agricultural University, 1977) Pillai, G R; Balakrishnan, S; Veeraraghavan, P G; Santhakumari, G; Gopalakrishnan, R
Experiments were conducted to study the response of nendran banana to different levels of N, P and K at the Banana & Pineapple Research Station, Kannara for five consecutive seasons from 1963 — 64. The results revealed that the nutrients N and K exerted a significant positive influence on fruit number and bunch weight. The optimum dose of N and K2O corresponding to maximum yield of fruit has been worked out as 191, and 301 g per plant respectively. The economic optimum dose according to to the prevailing market rate has been worked out as 133 and 260 g of N and KSO respectively per plant per year.
Response of sesamum to water management practices under varying levels of nitrogen
(Kerala Agricultural University, 1989) Jose Mathew; Kuruvilla Varughese; Pillai, G R; Santhakumari, G
A field experiment on sesamum (Sesamum indicum) with five water management practices (No irrigation and irrigation at 0.25, 0.50 and 0.75 IW/CPE ratios and at critical stages of 3-4 leaf stage, branching, flowering and pod formation) and four nitrogen levels (0, 15, 30 and 45 kg N/ha) was conducted in the sandy loam soil of the Agronomic Research Station, Chalakudy during the three summer seasons of 1983, 1985 and 1986. Irrigating sesamum with 40 mm water at the critical stages of 3 - 4 leaf stage, branching, flowering and pod formation or at 0.75 IW/CPE ratio (at an approximate interval of 13 days) resulted in significant higher grain yield as compared to unirrigated or less frequently irrigated crops. The response to nitrogen application up to 45 kg/ha was linear in nature having no interaction effect with water management practices. However, the yields of grain at 30 and 45 kg/ha of nitrogen were comparable.
Response of winter rice to different water regimes and nitrogen levels
(Kerala Agricultural University, 1990) Jose Mathew; Kuruvilla Varghese; Pillai, G R; Santhakumari, G
A sutudy was conducted at the Agrnomic Research Station, Chalakudy for three consecutive winter (second crop) seasons from 1983-84 to 1985-86 to study the effect of different water regimes and nitrogen levels on the growhth and yield of short duration rice variety Triveni. Four water regimes (continuous submergence of 5±2 cm and 7