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Baloch P.A.,Coastal Agricultural Research Station | Abro B.A.,Rice Research Institute | Solang A.H.,Coastal Agricultural Research Station | Siddiqui A.A.,Coastal Agricultural Research Station
Pakistan Journal of Scientific and Industrial Research Series B: Biological Sciences | Year: 2013

An effect of nitrogen (N) in presence and absence of phosphorus (P) and potassium (K) on growth and yield characteristics of chilli {Capsicum annum L.) was studied at Coastal Agricultural Research Station, Southern Zone Agricultural Research Centre, PARC, Karachi, during 2008-2009. The crop under investigation was fertilized with a total of six treatments i.e. 90-0-0, 90-60-75, 0-60-75, 120-0-0, 120-90-105 and 0-90-105 kg/ha of NPK. The analyses of data revealed that it was possible to harvest a satisfactory crop yield without addition of P or K, but it would not be possible to get desired crop yields without application of N, because an adverse effect on fruit yield was noted in absence of N. On the other hand stoppage of P and K did not show any economically adverse effects. However, combined application of NPK positively enhanced growth and yield characters. It was concluded that N in presence of P and K (120-90-105 kg/ha) proved best for better production of chilli var. Malir local under agro climatic conditions of Malir district, Sindh.

Abdul H.S.,Coastal Agricultural Research Station | Zafar Iqbal M.,University of Karachi
Pakistan Journal of Botany | Year: 2011

Three varieties of the coconut (Tall, Dwarf and Hybrid) were subjected to analyse for physicochemical properties of meat and nut water, Sodium (Na), Moisture %, Ash %, Calcium (Ca), Iron (Fe), Magnesium (Mg), Cobalt (Co), Potassium (K), pH, Volatile matters, Caloric value (CV) and Total dissolved solids (TDS). The chemical analysis of Meat (mature & immature stage) showed high percentage of Mg and Na in study varieties. However, it was apparent that major portion of stored Ca, Mg, and Na were lodged in the nut water. The nutrients Na, K and Ca were high or less evenly distributed in the Kernel and Water, whereas there was nutrient a comparatively greater concentration of P and Mg in the Water. The K (56% to 81%) was higher in nut water as compared to other ones. The results showed Mg 45% to 70% and Na 1% to 53% in mature and immature meat, respectively.

Solangi A.H.,Coastal Agricultural Research Station | Iqbal M.Z.,University of Karachi
Pakistan Journal of Botany | Year: 2012

The study was undertaken to determine the effect of organic and inorganic fertilizers amendments on the growth parameters of coconut seedlings in field at the Coastal Agricultural Research Station, Karachi. The seedling height and number of leaves were significantly high in treatment T7 (Neem seed powder) (27.62 ± 8.74) and treatment T5 (NPK) (27.18 ± 8.60). The maximum number of the roots was observed in T1 (NPK + Neem seed powder + Gliricidia sepium) (2.26 ± 0.71) and T3 (NPK + Gliricidia sepium) (1.69 ± 0.53), where as minimum roots was recorded in T8 (Control) (0.94 ± 0.29). The maximum number of leaves was observed in T4 (Neem seed powder + Gliricidia sepium) (1.49±0.47) and T1 (1.31±0.41). The results showed the beneficial effects of organic and inorganic fertilizers on seedlings. The work indicated morphological diversity of seedlings at the nursery stage to help the growers in choosing planting materials for their gardens in coastal area of Sindh and Balochistan.

Solangi A.H.,Coastal Agricultural Research Station | Mal B.,Coastal Agricultural Research Station | Kazmi A.R.,Coastal Agricultural Research Station | Zafar Iqbal M.,University of Karachi
Pakistan Journal of Botany | Year: 2010

The leguminous Gliricidia sepium (Jacq.) Stud., was for the first time tested on sandy loam soil in Coco nucifera L., plantations at Coastal Agricultural Research Station, PARC, Karachi, Pakistan. The aspect of morphological characteristic, floral biology and management of G. sepium were studied from February 2006 to November 2008. Twenty plants were marked and observed after every 4th day for morphological and phonological studies. The morphometric characteristic were small to medium sized tree, upto 06-11 meter in height. Branched frequently from the base reaching 40-60cm. Bark was smooth and whitish grey to light red brown. The leaves were odd pinnate and usually alternate with an average of 22.68cm long and 3.92cm width having 11.4 leaflets; midrib and rachis occasionally striped red. Leaf shading started in November and remained up to February. For floral biology, flowers and inflorescences were marked and observed until fruit set. Inflorescences appeared as clustered racemes on distal parts of new and old wood. The flowers were bloom with pink or reddish to lavender color during January and February. The fruit was green, tinged reddish purple when imature, light yellow-brown when mature narrow an average of 13.8 cm long, 2cm wide, 5-9 numbers of seeds/pods yellow-brown nearly round. Plants planted through seeds and cuttings had better biomass production of cuttings as compared to seeds. The nutrients concentration percentage showed minimum and maximum, potassium and chloride respectively. Aphids were observed during flowering season, especially in January and February. It produces fruit after cross-pollination. Aphid, honey bees and the main pollinators of this species were also noted.

Solangi A.H.,Coastal Agricultural Research Station | Anwar Arain M.,Grain Storage Laboratory | Zafar Iqbal M.,University of Karachi
Pakistan Journal of Botany | Year: 2010

Leaf samples of six coconut varieties were collected to determine stomatal studies. Scanning electron micrograph showed that stomata, found only on the abaxial epidermis, were arranged in parallel rows and sunken below the epidermis. The stomatal complex is characterized by the presence of two guard cells and four subsidiary cells, two of which are roundish and the other two are lateral to the guard cells. The values of stomatal features were statistically significant for some Tall, Dwarf and Hybrid coconuts. The mean number of the stomates per mm2 of leaf surface were higher in Tall and Hybrid compared to the Dwarf varieties of coconut. The mean length of the varieties ranged from 31.66μm to 39.06μm and the width 9.46μm to 12.8μm was noted. Stomatal densities of the Sri Lanka Green Dwarf and Ranthambly have 215.18mm2 and 189.87mm2 respectively.

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