Browsing by Author "Abdul Salam, M"

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Changes in IAA levels in rice due to urea-carbofuran interaction
(Kerala Agricultural University, 1990) Abdul Salam, M; Subramanian, S
Effect of applied potassium and rhizobial inoculation on nodulation and uptake of fertilizer nutrients by soybean
(Kerala Agricultural University, 1983) Reena Grittle Pinhero; Tajuddin, E; Abdul Salam, M; Vikraman Nair, R
Effect of continuous application of fertilizer nutrients on the long term productivity of a rice cropping system
(Kerala Agricultural University, 1990) Tajuddin, E; Abdul Salam, M; Shahul Hameed, S M; Yageen Thomas; Devandesan, S
Field experiments conducted for a period of seven years to study the effect of continuous application of fertilizer nutrients on the long term productivity of a rice based cropping system revealed that nitrogen application increased grain yield in all the seasons for a period of seven years. Both the physical and economic optimum dose of N decreased @ 4.06 and 3.7% per season, respectively. Nitrogen application @ zero and 120 kg/ha per season continuously over a period of five years, decreased the grain yield @ 1.47 and 1.28 g/ha/year, respectively. But application of N @ 40 kg/ha during the same period increased grain yield 6 1.22 q/ha/year. The productivity of plots applied with N @ 80 kg/ha remained stable. The study clearly revealed the possibility of skipping P for four years and K for seven years in soils containing medium amounts of these nutrients. Application of N at optimum dose is important to maintain the long term productivity of a rice based cropping system involving rice-rice-fallow.
Effect of different levels of nitrogen phosphorus & potassium on the growth & yield of vegetable cowpea var. kurutholapayar grown as an intercrop in the coconut gardens & in the open
(Department of Agronomy, College of Agriculture, Vellayani, 1987) Rajesh Chandran; Abdul Salam, M
Field experiments were conducted at the college of Agriculture, Vellayani during 1986 to study the effect of three levels of nitrogen (10,20 30 kg/ha), three levels of phosphorus (20, 40, 60 kg P2 O5 /ha) and three levels of potassium (10,20 and 30 kg K2 O/ha) on the growth, yield and quality of vegetable cowpea Var. Kurutholapayar grown in the coconut gardens and in the open. The experiment was laid out in a 33 factorial experiment with two replications confounding NPK in replication I and NP2 K2 in replication 2. The same experiment was simultaneously laid out, both in the open and in the coconut garden. The abstract of the results is presented below. Nitrigen application upto 30 kg/ha or phosphorus application upto 60 kg P2O5/ ha increased the vine length, leaf number per plant, dry matter production, number of pods per plant and number of seeds per pod. Application of 30 kg N/ha or 60 kg P2 O5/ ha resulted in the highest uptake of nitrogen and phosphorus. The highest potassium uptake was noticed with the application of 20 kg K2 O/ ha. The fresh bhusa yield of vegetable cowpea var. Kurutholapayar increased with N application upto 30 kg/ha or P application upto 60 kg P2 O5/ha. Application of potassium had no significant effect on the fresh pod yield of vegetable cowpea in the red loam soils of vellayani containing medium amounts of potassium. A maximum net income of Rs. 11,044.80 was obtained from the plants raised in the open by the application of “30 kg N along with 60 kg P2 O5 and 30 kg K2 O/ha”. In general, vegetable cowpea grown in the open showed a much better performance compared to those raised under the partial shade.
Effect of graded doses of N, P and K on the yield and quality of blackgram var. KM-1 grown in rice fallows
(Kerala Agricultural University, 1981) Annamma George; Nair, K P M; Abdul Salam, M
The field experiment conducted during the third crop season of 1978-79 in the rice fallows of Instructional Farm, College of Agriculture, Vellayani, Trivandrum to study the effect of three levels each of nitrogen {20,30 and 40 kg ha), phosphorus (30, 45 and 60 kg/ha) and potash (10,20 and 30 kg/ha) on the yield and quality of blackgram and economics of fertilizer application to blackgram variety KM-1 revealed that the grain yield was significantly increased by increase in the level of potash. The maximum grain yield of 1757 kg/ha was recorded at 30 kq K20/na. Though the levels of nutrients had no significant influence on protein content, grain protein yield was significantly increased with increase in the leve! of potash, giving the maximum grain protein yield of 410. 86 kg/ha with 30 kg K^O/ ha. The maximum net profit of Rs, 3693.30 was also obtained from the plot which received 30kg KaO/ha.
Effect of potassium and rhizobial inoculation on growth, yield and quality of soybean in the sandy clay loam soils of Kerala
(Kerala Agricultural University, 1982) Reena Grittle Pinhero; Tajuddin, E; Abdul Salam, M; Vikraman Nair, R
An experiment wasconducted at the Instructional Farm attached to the College of Horticulture, Vellanikkara to study the effect of potassium and rhizobiai inoculation on growth, yield and quality of soybean. The study revealed that applied potassium and rhizobiai culture inoculation did not significantly influence growth characters, yield components, seed yield and stoveryield. Protein content and oil content were significantly influenced by levels of potassium and inoculation. The highest oil content was recorded by 120 kg K20/ha and the highest protein content was obtained without application of potassium. Inoculation increased the protein content and decreased the oil content of seeds. Studies on residual effects of treatments during 2nd crop season revealed that there was no marked variation in seed yield.
Growth and yield of rice as influenced by potassium and kinetin
(Department of Agronomy, College of Agriculture, Vellayani, 1988) Sakeena, I; Abdul Salam, M
With a view to study the effect of potassium and kinetin on growth, asssim iiate partitioning, nutrient uptake and yield of a short duration rice variety Triveni, an experim ent was conducted at the Cropping Systems Reasearch C entre, K aram ana, Trivandrum during summer 1987. The soil of the experim ental field was sandy loam, acidic in re action, low in available nitrogen and potassium and medium in available phosphorus. The treatm en ts consisted of a factorial combination of 4 levels of potassium (0, 17.5, 35 and 70 kg K20/ha) and 4 levels of kinetin (w a te r1 spray, 10 ppm kinetin at flowering, 10 ppm kinetin at 10 DAF and 10 ppm kinetin at flowering and again at 10 DAF). The experiment was laid out in a randomised block design with three replications. An abstract of the results is given below. The effects of potassium and kinetin were synergestic on growth, yield and nutrient uptake of rice and a combination of 35 kg K2O/ha plus a single spray of 10 ppm kinetin at 10 DAF was optimum. Both potassium as well as kinetin application prevented the accum ulation of carbohydrate and proteins in the ’source' and enhanced their accum ulation in the econom ic 'sink'. Their interaction effect was also favourable in this respect and 35 kg K20 /h a plus a single spray of 10 ppm kinetin at 10 DAF was optimum.
Nutritional requirement of green gram (Vigna Radiata (L.) Wilczek) grown in rice fallows
(Kerala Agricultural University, 1981) Savithri, K E; Nair, K P M; Oommen, M; Abdul Salam, M
A field experiment to study the effect of three graded levels each of nitrogen (20, 30 and 40 kg/ha), phosphorus (30, 45 and 60 kg Pa05/ha) and potash (10, 20 and 30 kg K20/ha) on the yield and quality of green gram variety, Pusa Baisakhi grown in rice fallows of the Instructional Farm, College of Agriculture, Vellayani, Trivandrum has shown that the grain yield was significantly increased by highest level of potash over the lowest level and bhusa yield by highest level of nitrogen over the lower levels. Levels of nutrients had no significant influence on grain protein content, but highest level of potash significantly increased the grain protein yield over the lowest level. In the case of protein content of bhusa, higher levels of potash showed an adverse effect whereas fodder protein yield was not significantly affected by the treatments.
Root activity of rice as influenced by zinc application
(Kerala Agricultural University, 1987) Abdul Salam, M; Subramanian, S
Studies on the effect of graded doses of nitrogen and diffrerent spacings on growth yield and quality of three varieties of sunflower ( Helianthes annus L.) viz. EC. 68413, EC. 68414 and sunrise selection
(Department of Agronomy, College of Agriculture, Vellayani, 1976) Abdul Salam, M; Sadanandan, N
Uptake pattren of major & minor nutrients in selected cashew types
(Department of Agronomy, College of Horticulture, Vellanikkara,, 1992) Beena Bhaskar; Abdul Salam, M
An investigation was undertaken at the Kerala Agricultural University during 1990-92 to study the varietal difference in growth and nutrition of 18 cashew varieties. The study was also aimed to assess the variability in nutrient concentration in plant parts and the nutrient offtake. The variation in the absorption of soil applied 32p at different physiological phases was also assessed. The experimental trees were at the fifth year of planting. The most important findings are abstracted below. Two cashew varieties viz. M 44/3 and M 26/2 originated from Cashew Research Station, Vridhachalam gave higher nut yield. The concentrations of major and minor nutrients (N, P, K, Ca, Mg, S, Fe, Mn, Zn and Cu) differed among plant parts (leaf, apple, kernel and shell) and between the varieties. The cashew kernel had the highest concentration of N, P, Ca, S, Zn and Cu compared to leaf and apple. The concentrations of K, Mg and Fe were high in apple. The Mn concentration was high in leaf. The nutrient concentration was low in the shell. A four year old cashew tree yielding 4.08 kg nut and 4.15 kg apple on dry weight basis removed 239 g N, 7.51 g p, 110 g k, 14.2 g ca, 6.40 g mg, 6.46 g S, 1709 mg Fe,233 mg Mn, 252 mg Zn and 86 mg Cu. Among apple, kernel and shell, the nutrient removal was largest through apple. Leaf nutrient status of cashew varied with physiological phases. The concentrations of N, P and K in the leaf were high at “flushing and early flowering’’ phase. Absorption of soil applied 32p differed between physiological phases but not between the varieties and the absorption peak was noticed in the “flushing and early flowering’’ phase. Irrigation of cashew trees during summer increased the absorption of soil applied 32p.
Varietal reaction to nutrient and moisture stress in cashew (Aracardium occidentale L.)
(Department of Agronomy, College of Horticulture, Vellenikkara, 1998) Latha, A; Abdul Salam, M
Five experiments were conducted at Cashew Research Station, Kerala Agricultural University, Madakkathara during 1996-98 to identify drought tolerant varieties of cashew, to study the response of cashew to applied N at different levels of drip irrigation and to assess the tolerance of cashew varieties to N, P and K deficiency in soil. The abstract of the experiments is given below. Exp. I. Varietal variation in drought tolerance The varieties H-1591, M-26/2, V-5 and M-44/3 are drought tolerant and K-22-1 is drought sensitive. Exp. II. Response of cashew to applied N at different levels of irrigation (drip) N application @ 1500 g per tree per year along with irrigation @ 80 litres per tree per day (through drip) is essential in the state of Kerala for obtaining best results from cashew. Exp . lIl. Tolerance of cashew varieties to N dificient soils The varieties H-1591 and M-2612 are efficient for N deficient soils. The N use efficiency of cashew seedlings grown under pot culture was 24.7 per cent. Exp. IV. Tolerance of cashew varieties to P deficient soils H-1591 is an efficient variety for P deficient soils. The P use efficiency of cashew seedlings grown under pot culture was 8.02 per cent. Exp. V. Tolerance of cashew varieties to K deficient soils The varieties H-1591, M-26/2 and H-1598 are efficient for K deficient soils. The K use efficiency of cashew seedlings grown under pot culture was 12.17 per cent. N, P and K absorption of a six month old cashew seedling was in the order of 151.95 mg N, 21.58 mg P and 49.48 mg K per plant with a nutrient absorption ratio of7: 1:2 (approximately). The variety H-1591 is a super variety capable of tolerating not only drought but also N, P and K deficient soils. The variety M-26/2 is capable of tolerating drought as well as N and K deficiency in soils. The variety K-22-1 is drought sensitive.