Browsing by Author "Hassan, M A"

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Chemical characteristics of lateritic soils in the ribbon valleys and corresponding uplands of Kerala
(Kerala Agricultural University, 1980) Hassan, M A
A comparative study of the chemical characreristics of the upland lateritic soils and the corresponding lateritic alluvium in the ribbon-valleys of the midland regions of Kerala State was conducted. The C E C, exchangeable cations, level of organic matter, total and available nutrients were all found to be low.
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 graded doses of nitrogen, phosphorus and potassium on growth and yield of oriental pickling melon (Cucumis melo var. Conomon)
(Kerala Agricultural University, 1984) Hassan, M A; Sasidhar, V K; Peter, K V
A 33 factorial experiment with nitrogen (0,60, 120 kg/ha), P^ (0, 45, 90 kg/ha) and KaO (0, 45, 90 kg/ha) was laid out to find out optimum and economic levels of the above nutrients for maximising fruit yield in oriental pickling melon. Response to nitrogen was observed to be quadratic and the optimum level was calculated as 96.6 kg/ha and the economic level as 45.38 kg/ha. The P206 application produced no significant effects in melon for different characters studied. Response to K20 was linear.
Effect of NPK fertilizers on the availability of micronutrients in submerged laterite rice soils of Kerala
(Kerala Agricultural University, 1992) Anilakumar, K; Hassan, M A; Johnkutty, I; Menon, P K G
Effect of organic sources on nitrogen availability in flooded rice soils
(Kerala Agricultural University, 1989) Anilakumar, K; Johnkutty, I; Hassan, M A; Menon, P K G
A study was conducted during the rabi season of 1982 to study the changes of N in the lateritic rice soil as well as in the rice plant as influenced by flooding in the presence of various organic and inorganic sources of nitrogen. The results revealed that daincha treated plots were able to liberate more nitrogen in the soil as well as in the solution than farm yard manure or azolla treated or urea alone treated plots. In general the NH4-N content in the soil showed a progressive decrease from tillering to harvest (11.13 - 1.99 ppm). The chemical kinetics of NOj-N, hydrolysable-N, non-hydrolysable N, organic carbon and total N were not influenced by the various treatments. Urea applied alone or in combination with daincha was found better for increased N uptake by the rice plant.
Intake, retention and depletion of water in different rice soils as related to their physico-chemical properties
(Kerala Agricultural University, 1994) Hassan, M A; Anila Kumar, K
Kinetics of silicon in relation to different levels of major nutrients in the lateritic flooded rice soils
(Kerala Agricultural University, 1990) Anilakumar, K; Johnkutty, I; Hassan, M A; Menon, P K G
Nutrient interactions in soil test crop response studies on cucumber ( Cucumis sativus L) in the laterite soils of Kerala.
(Department of Soil Science and Agricultural Chemistry,College of Horticulture, Vellanikkara, 2011) Sajnanath, K; Hassan, M A
A comprehensive approach has to be adopted for efficient fertilizer use, incorporating soil test, field research and economic evaluation of the results for providing a scientific basis for the process of enhancing and sustaining food production as well as soil productivity with minimum environmental degradation, it needs more. Soil testing is one of the best scientific means for quick and reliable determination of soil fertility status. Soil test crop response study in the field provides soil test calibration between the level of soil nutrients as determined in the laboratory and the crop response to fertilizers as observed in the field for predicting the fertilizer requirements of the crop. In Kerala, many studies have been conducted to get a fertilizer prescription equation for targeted yield in various crops like rice, banana etc. A programme was formulated to investigate the nutrient interaction in soil test crop response studies on cucumber (Cucumis sativus L.) in the laterite soils of Kerala. In this, the field works were conducted as per the pattern of soil test crop response correlation studies. A gradient crop experiment was conducted in the experimental field of AICRP on STCR using maize. The purpose is to create a fertility gradient in the field by applying different doses of fertilizers. The area was divided into three strips and the doses of nutrients were applied as per STCR pattern of fertilization for maize. The crop was harvested and the plant samples were taken for analysis. The pre and post experimental soil samples were analysed. It was found that fertility gradients were developed in the field. Using the data on dry matter production in various strips, the nutrient uptake was also determined. A test crop experiment was designed in the same field where the gradient crop was raised. There were 24 treatments with three control plots. The treatments included four levels of nutrients and three levels of farm yard manure. The crop, cucumber (Var.: AAUC-2), popularly known as salad cucumber, was raised and managed as per package of practices of KAU. The soil samples were collected before, at flowering and harvest stages during the experiment. The plant samples were collected at flowering and harvesting stages. The total dry matter production and yield were taken treatment wise at the harvest. The soil samples were analysed for various chemical parameters. The data on yield, uptake of nutrients, nutrient status, nutrient requirement, quantity of farm yard manure applied were used for formulating the fertilizer prescription equations for cucumber. Using these equations, the quantity of fertilizers to be used to get a target of yield can be calculated if the available nutrient status is known. The equations thus developed were verified in farmers' field at four locations; Pallikandam, Maraikkal, Ayiloor and Vithanassery. The fields were laid out with five treatments and four replications. The treatments were (i) farmers' practice (ii) KAU package, (iii) soil testing laboratory method, (iv) STCR method with a target of 30 t ha-I and (v) STCR method with a target of 35 t ha-I. The soil samples were analysed before raising the crop and the quantities of fertilizers to be applied were computed for various treatments. The plant and soil samples at flowering and harvest stages were analysed for pH, EC, CEC, Organic Carbon, available N, P, K, Ca, Mg, and micronutrients such as Fe, Mn, Cu and Zn. The total dry matter production and yield were taken treatment wise at the harvest. The data were used for- statistical analysis for assessmg direct and indirect effect of nutrients on yield and nutrient interactions. A positive correlation was observed between organic carbon' and soil parameters at flowering stage. At the harvesting stage, there was a positive correlation was found between yield and major nutrients. The interaction between available P in the soil and Nand K in the plant was observed. The availability ofP in plant was negatively correlated with Fe in the soil. The targeted yield equations for cucumber could produce the yields of 30 and 35 t ha-I from the verification experiments conducted at the different locations. The B:C ratio also was higher in the STCR methods over the farmers' practices, blanket recommendations and STL recommendations. The information generated in the project will help in making the soil testing programme scientifically sound in terms of achieving predicted yields, maintaining soil fertility and helping the extension agencies in ensuring balanced fertilizer use according to the soil fertility status and crop requirement.
Quality attributes of colocasia (Colocasia Esculentus)
(Kerala Agricultural University, 1980) Asokan, P K; Hassan, M A; Neelakantan Potti, N
Quality characteristics of five varieties of Dioscorea alata L.
(Kerala Agricultural University, 1981) Ashokan, P K; Neelakantan Potty, N; Hassan, M A
Regulation of major plant nutrients and organic matter for improving the nutritive quality of banana grown in laterite soils
(Department of Soil Science and Agricultural Chemistry, College of Horticulture, Vellanikkara, 1999) Binu Thomas; Hassan, M A
Soil test crop response studies on coleus (Solenostemon rotundifolius Poir J.K Morton) in the laterite soils of Kerala
(Department of Soil Science and Agricultural Chemistry, College of Horticulture, Vellanikkara, 2003) Nagarajan, M; Hassan, M A
Investigation entitled" Soil Test crop response studies on coleus in laterite soil of Kerala" consisting of two experiments namely fertility gradient experiment and STCR experiment was conducted during 2002 in the farm attached to the College of Horticulture, Vellan ikkara. Objective of the study was to develop soil test based balanced fertilizer recommendation for specific yield targets of coleus in laterite soils of kerala and provide a basis for fertilizer recommendation for maximum and economic tuber yield at varying soil test values. The fertility gradient experiment was conducted to create desired gradient in soil fertility in one and the same field by applying graded doses ofN, P, and K fertilizers and raising fodder maize var.Co.l. After development of fertility gradient, the STCR experiment was conducted in the same field with the test crop, coleus variety Nidhi.The treatment structure consisted of four levels of N (0,20,40, and 80 kg ha'), three levels of P20S (0,45 and 90 kg ha-I) and five levels of K (0, 25, 50, 100, 200 kg ha-I) along with three levels of FYM (0, 7.5 and 15 t ha-I) The nutrient requirement of coleus, variety Nidhi were estimated to be 9.15,1.38 and16.38 kg ha-I N, P20S and K20 respectively to produce one tonne of tuber. The soil efficiencies worked out as 21,46.85 and 40.85 per cent for N, . , P205 and K20 respectively for coleus in laterite soil. The contribution of nutrients from the fertilizers for coleus was calculated as 61.6,9.57 and 56.60 per cent for N, P205 and K20 respectively. From the above basic data, fertilizer prescription equation for specific yield targets of coleus variety Nidhi in the laterite soil were derived as follows, Without rVM FN =14.85T-0.34SN FP205 =14.42T-l J.21SP FK20 =28.98T-0.87SK FN, F P20S, F K20 - Fertilizer N, P20S and K20 respectively T - Target yield of tuber in t ha-I SN, SP, SK - Soil available N, P and K in' kg ha-I respectively . WithFYM FN 14.85 T - 0.34 SN - 0.34 ON 14.42 T - 11.21 SP - 3.25 OP F K20 = 28.93 T - 0.87 SK - 1.22 OK Where, ON, OP and OK are quantities ofN, P and K supplied through organic manure in kg ha" Multiple regression models calibrated with yield as dependent variable and STVs for available N, P and K and applied nutrients as independent variables had 67.4 per cent predictability. Among the three fertilizer nutrients, FN only showed the normal type (+, -, -) of response. The fertilizer adjustment equation fur v,!rying levels of soil available N for maximum tuber yield (t ha") of coleus in laterite soil was derived as FN= 168 SN, where FN is fertilizer N (kg ha"): SN is available N (kg ha-I) is soil. The behavior of applied p and K was found to produce responses other than normal and hence optimization coula not be done for fertilizer P and K at varying soil test values. Simple correlations coefficient was worked out for Nutrient uptake, soil available nutrients, applied nutrients with yield of coleus. Available nutrients -! showed higher positive correlation" than that of allied nutrients. The uptake of nutrients (N, P and K) also significantly correlated with yield of coleus. This study is useful to adjust fertilizer doses based on the specific objective and available resources of coleus farmers of the state.
Soil test crop response studies on ginger in laterite soils of Kerala
(Department of Soil Science and Agricultural Chemistry, College of Horticulture,Vellanikkara, 2001) Jayalakshmi, M; Hassan, M A
Standardization of rooting media for selected tree crop seedlings with special reference to plant nutrients
(Department of Soil science and Agricultural chemistry, College of Horticulture, Vellanikkara, 1996) Sudheesan, V P; Hassan, M A
A randomized block design (split plot) experiment involving twelve important tree crop seedlings (Ailanthus triphysa, Albiziafalcataria, Albizialebbeck. Casuarinaequisetifolia, Ceiba pentandra, Dalbergia latifolia, Gmelina alborea, Hopea parviflora, Santalum album, Swietenea macrophylla, Tectona grandis and Vateria indica) was conducted in the Instructional Farm, College of Horticulture, Vellanikkara, Kerala Agricultural University, with an objective of standardising the most suitable rooting media for the best growth of above tree seedlings in the nursery for agroforestry planting. In this study altogether twelve different media were tried, considering their relative cheapness, easy availabily and more or less satisfying the desired qualities of an ideal rooting medium. The results showed that the rooting medium containing soil, sand and FYM in the ratio of 1:1:1 was ideal for all the species except for Dalbergia and Vateria. For Dalbergia, the best medium found was soil ½, sand 1/3 and neem cake 1/6 and for Vateria it was soil 1/3, sand 1/3 and saw dust 1/3.
Variation in evapotranspiration and crop coefficients of rice at the regional agricultural research station, Pattambi
(Kerala Agricultural University, 1994) Hassan, M A; Ramachandran, V R