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‘Kufri jyothi’ is a variety of – (potato)
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‘Pusa ruby’ is a variety of – (tomato)
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Highest tomato producing state of india – (andhra pradesh)
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Highest brinjal producing state of india – (west bengal)
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Highest cabbage producing state of india – (west bengal)
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Imperial agricultural research institute (iari) started at pusa, bihar in – (1903)
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Sugarcane breeding station established in 1912 at – (coimbatore)
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India’s first agricultural university started in – (1964, pantnagar)
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Most commercial crops introduced to india by – (portuguese)
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‘Agrostology’ is the study of – (fodder grasses)
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‘Glycine max’ is – (soybean)
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‘Pomology’ is the study of – (fruits)
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‘Olericulture’ is the study of – (vegetables)
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‘Arboriculture’ is the study of – (growing trees)
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Sunhemp is a – (green manure crop)
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Study of field crops – (agronomy)
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Black cotton soils found in – (chittoor taluk, palakkad)
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pH of black cotton soils – (6.5 to 8.5)
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Red soils in thiruvananthapuram at – (nemom, neyyatinkara & parassala)
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Pokkali & kaipad areas have – (acid-saline soil)
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Crop suited for acid-saline soil – (paddy)
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pH range of acid-saline soils – (3 to 5)
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Presence of partially decomposed organic residues indicates – (kari soil)
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Kari soils otherwise known as – (peat soils)
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Kari soils in kuttanad at – (purakkad, ambalappuzha & thakazhi)
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Main crop of kari soil – (paddy)
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Soil type at or below msl with flooding/water stagnation – (kari soil)
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Coastal alluvium sand content >80% & clay <15% – (true)
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Kerala has – (9 soil types)
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Most prominent soil type in kerala – (laterites)
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Liming materials include – (limestone, quicklime, hydrated lime)
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Neutralizing power expressed as kg of – (calcium carbonate)
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Neutralizing power of burnt lime – (182.1)
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Neutralizing power of hydrated lime – (136.9)
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Districts without coastal features – (idukki, wayanad, palakkad)
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Midland in all districts except – (wayanad)
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Midland mainly has – (laterite soil)
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Elevation of upland – (300–600 m)
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Plantation crops mainly grown in – (upland)
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Soil types of upland – (hill & forest soils)
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Elevation of highland – (600–1200 m)
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Highest peak in kerala – (anamudi, 2694 m)
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Forest soils seen in – (highland areas)
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Kerala has – (3 east-flowing & 41 west-flowing rivers)
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Climate of kerala – (humid tropical)
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Contribution of southwest monsoon to kerala rainfall – (60%)
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Salts of strong bases & weak acids correct – (acidity)
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pH measured in lab by – (electrometric method) & in field by – (indicator method)
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Fungi are very active in – (lower pH)
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Bacteria & actinomycetes thrive in – (intermediate & higher pH)
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Phosphorus availability maximum at pH – (6 to 7)
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Loss of ca & mg by leaching causes soil acidity to – (increase)
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Buffering capacity proportional to – (cation exchange capacity)
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Low pbs in soil indicates – (acidity)
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Organic matter decomposition forms – (carbonic acid)
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Sulphuric & nitric acids add – (hydrogen ions)
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Fundamental process of soil formation – (weathering)
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pH of mineral soils declines during – (summer)
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Hydrogen ions in soil produce – (acidity)
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Lime requirement depends on – (active & reserve acidity)
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Cation exchange capacity (cec) is property of – (soil colloids)
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Capacity of soil colloid to adsorb/release nutrients – (cec)
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Soil solution dominance of h+ ions means – (acidic soil)
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Gypsum requirement found using – (schoonorvar’s method)
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No lime needed if soil pH above – (6.4)
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Potassium estimation by – (flame photometric method)
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Phosphorus estimation by – (bray’s method)
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Organic carbon estimated by – (calorimetric method)
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Soil nitrogen estimated from – (organic carbon)
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Anaerobic decomposition yields – (amines & ammonia)
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Total soluble salts estimated with – (conductivity meter)
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Oxidation status of – (iron & aluminium) influences soil colour
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Soil pH estimated using – (10 g processed soil)
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Representative soil sample called – (composite soil sample)
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Soil sampling surface depth – (9 inches)
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Presence of oxygen indicated by – (grey soil colour)
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Carbon in aerated soils → co₂; in waterlogged soils → (methane)
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Vermiculite contains – (magnesium)
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Clay soils contain at least – (35% clay)
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Anaerobic decay produces – (carbon dioxide & organic acids)
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Aerobic organisms require – (oxygen)
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Common field method to determine soil class – (feel method)
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Slow decay in swampy areas due to lack of – (oxygen)
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High temperature increases – (carbon dioxide production)
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Soil co₂ higher in summer, lower in winter – (true)
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Particle density expressed in – (g/cc)
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Mass of dry soil per unit volume (incl. pores) – (bulk density)
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Loose, porous soils have – (low bulk density)
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Sandy soil has – (low bulk density)
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Soil air composition varies with – (organic matter content)
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O₂ & CO₂ related to – (soil organic matter)
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CO₂ increases & O₂ decreases with – (soil depth)
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Granulated soils have – (low bulk density)
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Excess co₂ in soil air retards – (plant growth)
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Gas exchange mechanisms – (mass flow & diffusion)
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Oxygen content of soil air is – (lower than atmosphere)
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Structure of surface soils with high organic matter – (granular & crumb)
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Oxygen supply essential for – (biological processes)
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Percentage mineral matter in soil – (45%)
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Primary mineral containing potassium – (feldspar)
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