Browsing by Author "Pillai, G R"

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Effect of age of seedlings and nitrogen levels on annapurna rice
(Kerala Agricultural University, 1975) Pillai, G R; Nair, R R; Pisharody, P N; Gopalakrishnan, R
An investigation was undertaken to study the effect of age of seedlings and nitrogen levels on Annapurna rice at the Rice Research Station, Pattambi, during first and second crop seasons on 1969-70 and 1970-71. The results revealed that the optimum age of seedlings for transplanting was 15 days during first crop season and 20 days during second crop season. Response due to nitrogen was significant only up to 80 Kg N/ha.
Effect of fractional application of lime on the growth and yield of rice (Oryzo saliva L.) in the acidic lateritic loam soil of Pattambi
(Kerala Agricultural University, 1974) Gopalakrishnan, R; Pisharody, P N; Nair, R R; Pillai, G R
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 leaf area on tuber yield of irrigated tapioca
(Kerala Agricultural University, 1982) Sushama, P K; Pillai, G R; George, T P; Jose Mathew
Evaluation of different methods for reducing percolation loss of water in rice fields
(Kerala Agricultural University, 1983) George, T P; Balakumaran, K N; Jose Mathew; Sushama, P K; Pillai, G R; Kuruvilla Varghese
Afield experiment was conducted in a sandy loam soil of the Agronomic Research Station, Chalakudy for five years (1974-'80 to study the efficiency of puddling with different implements (power tiller, country plough and wetland puddler), soil dressing with lateritic,loam and sub-soil compaction at 30 cm depth in reducing percolation loss in rice fields. The study showed that these methods neither effectively reduced the water loss nor influenced the grain yield.
Extraction pattern of soil moisture by bittergourd (Momordica charantia L.) under varying irrigation levels
(Kerala Agricultural University, 1990) George Thomas, C; Pillai, G R
Herbicidal control of weeds in pineapple variety kew
(Kerala Agricultural University, 1976) Balakrishnan, S; Pillai, G R; Kannan, K; Gopalakrishnan, R
A herbicidal trial on pineapple variety 'Kew' was undertaken at the Pineapple Research Centre, Kerala Agricultural University Vellanikkara during the years 1974-76 to test the efficacy of diuron and bromacil at different doses- The herbicides in general effectively controlled a broad spectrum of weeds. Among different dosages tried, diuron 3 kg per hectare was more effective and the treatment gave significantly increased yield without producing any harmful effects to fruit quality. From the point of economics also, diuron 3 kg per hectare was more economical.
Influence of fertilizer nitrogen and blue-green algae on growth and yield of rice (Oryza sat/va L.) under different soil moisture regimes
(Kerala Agricultural University, 1984) Pillai, G R; Pandey, S L; Venkataraman, G S
Studies on the influence of fertilizer nitrogen and blue-green algae on growth and yield of rice variety Pusa 2-21 under different soil moisture regimes revealed that submergence was essential to obtain maximum grain yield under Delhi conditions. The crop responded well upto 90 kg N/ha. Inoculation of blue-green algae was effective in increasing the grain yield of rice comparable to that obtained with 30 kg N/ha. The full benefit of algal inoculation could be derived only under continuous submergence in a comparatively dry year. Effect of algal inoculation was pronounced under lower levels of nitrogen.
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
Investigations on the competing ability of rice with weeds in the rainfed uplands
(Kerala Agricultural University, 1975) Nair, K R; Pillai, G R; Pisharody, P N; Gopalakrishnan, R
An investigation was conducted at the Rice Research Station Paltambi during the early kharif seasons of 1972 and 1973 to find out the period of weed competiiion that an upland rice crop could stand without adverse effect on yield, The results revealed that the weed competition was more critical during the early vegetative phase of the crop and that weed free conditions favoured higher grain production. The longest period of weed competition that the upland rice could tolerate was 30 days from sowing without adverse effect on, yield.
Investigations on the effect of heavy manuring of rice seed beds
(Kerala Agricultural University, 1977) Nair, R R; Pillai, G R; Pisharody, P N; Gopalakrishnan, R
Two field experiments were conducted at the Rice Research Station, Pattambi on seed bed manuring using IRS and Jaya as test varieties. The first experiment (1969—70, 1970—71) aimed to study whether nitrogen application in the main field (0, 40, 80," 120 kg/ha) could be reduced by phosphate manuring (0, 30, 60, 90 kg/ha) of the seed bed. The results showed that response to nitrogen was independent of the dose of phosphours applied in the seed bed. The effect of nitrogen (0, 40, 80 kg/ha) phosphorus (0, 25, 50 kg/ha) and potash (0, 25, 50 kg/ha) individually and in factorial combinations, on the productivity of rice seedlings was investigated in tde second experiment (1970- 71, 1971—72). The results conclusivly proved that applied nutrients had no significant influence on grain yield.
Irrigation and mulching in nendran banana
(Kerala Agricultural University, 1989) Pillai, G R; Kuruvilla Varughese; Jose Mathew; Santhakumari, G
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.
Performance evaluation of certain rice cultivars
(Kerala Agricultural University, 1993) Susamma P George; Devadas, V S; Sansamma George; Pillai, G R
Experiments were conducted with 12 rice cultivars for three consecutive years from 1984-85 to 1987-88 during kharif and rabi seasons in randomised block design. Pooled analysis of the data for kharif and rabi seasons indicated that MO 4 registered the highest grain yield in the kharif (5068 kg/ha) and rabi (4891 kg/ha) crop seasons. Hence MO 4 can be recommended for cultivation in Wynad in both the seasons. Edavaka was also found to be a promising cultivar when grain yield, straw yield and comparatively shorter duration were considered and hence requires further studies.
Performance of groundnut varieties in rice fallows under irrigated conditions
(Kerala Agricultural University, 1982) Jose Mathew; Thomas, A I; Pillai, G R; Kuruvilla Varghese
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 blackgram to different levels of irrigation in summer rice fallows
(Kerala Agricultural University, 1986) Kuruvilla Varughese; Jose Mathew; Pillai, G R
Studies conducted at the Agronomic Research Station, Chalakudy revealed that the grain yield of blackgram grown in rice fallows during summer was significantly influenced by water management practices. Irrigating the crop at an IW/CPE of 0.5 was found to be the best. The ratios of 0.75 and 0.5 and bellshaped irrigation recorded 105, 107 and 109 per cent increase in grain yield over no irrigation control. It was also observed that both the varieties tried viz., T9 and Co 2 were on par in all the three seasons.
Response of cassava to irrigation under pure and mixed stands
(Kerala Agricultural University, 1986) Kuruvilla Varughese; Jose Mathew; Pillai, G R
Afield experiment was conducted for two consecutive years in the sandy loam soil of the Agronomic Research Station, Chalakudy to study the effect of different irrigation schedules (0.3, 0.6 and 09 IW/CPE ratios) on the growth and yield of cassava under pure and mixed stands (cassava (M 4) alone and cassava intercropped with groundnut (TMV 2), cowpea (V 16), greengram (ML 26), and blackgram (T 9). It was revealed that under shallow water table conditions cassava requires irrigation only at IW/CPE ratio of 0.3 (approximately once in 37 days in the dry period) both under pure and mixed stands. It was also observed that cultivation of intercrops viz., greengram, cowpea, blackgram and groundnut gave additional income from the same piece of land without adversely affecting the yield of cassava.
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.