UPHESC Assistant Professor Agronomy PYQs

Concept: C.R. Das, defeated on council-entry at the Gaya Congress (1922), resigned the presidency and, with Motilal Nehru, formed the Congress-Khilafat Swaraj Party (1923).

1. Standard history texts attribute to him, in defence of breaking with the Congress majority, the line that the freedom of Indians is something more sacred than the Congress itself.
2. Tilak had died in 1920; Hakim Ajmal Khan and V. Patel were not the leaders of that split.

Short trick: Gaya 1922 → C.R. Das: 'freedom above Congress' → Swaraj Party.

Concept: Standard history texts attribute to Lord Birkenhead, Secretary of State for India (1924–28), the assessment that the Swaraj Party was the most highly organised political party in India.

1. The Swarajists won heavily in the 1923 elections and defeated Government measures in the Central Assembly.
2. C.R. Das was its founder, so his praise would not be an outside assessment; Irwin came as Viceroy only in 1926.

Short trick: Birkenhead – the British minister who admitted the Swarajists' organisation (and later set up the Simon Commission).

Concept: Basalt is an extrusive igneous rock formed from cooled lava.

1. Marble – from limestone; Graphite – from coal; Schist – from shale/mudstone: all metamorphic.
2. Deccan Traps are made of basalt.

Short trick: Basalt = lava = igneous.

Concept: Heavy rainfall adds fresh water and dilutes sea water, lowering salinity (e.g. equatorial belt lower than tropics).

1. High evaporation and strong winds increase salinity.
2. Average ocean salinity ≈ 35‰.

Short trick: Rain/rivers/ice-melt ↓ salinity; evaporation ↑ salinity.

Concept: The Aravallis are among the oldest fold mountains of the world, formed in the Pre-Cambrian era (Proterozoic).

1. Alpine orogeny – Himalaya, Alps (youngest).
2. Caledonian and Hercynian – Palaeozoic (e.g. Appalachians, Urals).

Short trick: Aravalli = oldest; Himalaya = youngest (Alpine).

Concept: Art. 12 defines 'State' for Part III: Government and Parliament of India, Government and Legislature of each State, and all local or other authorities within India or under its control.

1. All three listed items are expressly included.
2. Hence 'All of the above'.

Short trick: Art. 12 = who is bound by Fundamental Rights.

Concept: Art. 48A (added by 42nd Amendment, 1976): State shall protect and improve the environment and safeguard forests and wildlife.

1. Free education – Art. 45 / 21A; Public health – Art. 47.
2. International peace – Art. 51.

Short trick: 48A = environment (DPSP); 51A(g) = environment (citizen's duty).

Concept: Art. 112 – Annual Financial Statement (Budget) laid before both Houses.

1. Art. 110 – definition of Money Bill.
2. Art. 115 – supplementary grants; Art. 118 – rules of procedure.

Short trick: 112 = Budget; 202 = State budget.

Concept: Art. 20(1): no person shall be convicted except for violation of a law in force at the time of the act, nor given a greater penalty than then prescribed.

1. 20(2) – double jeopardy; 20(3) – self-incrimination.
2. 19(1)(a) – speech; 21A – education; 16(4A) – reservation in promotion.

Short trick: Art. 20 = 3 protections: ex-post facto, double jeopardy, self-incrimination.

Concept: Bombay Plan (1944) – by eight industrialists including J.R.D. Tata, G.D. Birla, Purushottamdas Thakurdas.

1. People's Plan (1945) – M.N. Roy.
2. Gandhian Plan (1944) – S.N. Agarwal; Sarvodaya Plan (1950) – J.P. Narayan.

Short trick: Industrialists of Bombay → Bombay Plan.

Concept: USSL (Richards, 1954) classification uses EC_e (dS/m), ESP and pH.

1. Saline: EC > 4, ESP < 15, pH < 8.5.
2. Saline-alkali: EC > 4, ESP > 15.
3. Alkali (sodic): EC < 4, ESP > 15, pH > 8.5 – matches the question.

Short trick: High EC = saline; high ESP = alkali; both high = saline-alkali.

Concept: Saline soils contain excess neutral soluble salts – chlorides and sulphates of Na, Ca, Mg (white crust, 'white alkali', Solonchak).

1. Alkali soils have excess exchangeable Na and Na₂CO₃ (black alkali, Solonetz).
2. Acid soils have excess H⁺ and Al³⁺.

Short trick: Neutral salts → saline (white); Na on exchange complex → alkali (black).

Concept: Standard lime-requirement table (ground limestone to raise pH of the plough layer from 5.5 to 6.5): warm-temperate/tropical (warm humid) clay loam needs about 2.0 tons/acre ≈ 5.0 t/ha.

1. Lime need rises with clay and organic matter (higher buffer capacity): sand < loam < clay loam < muck.
2. Warm humid soils need less than cool-temperate soils of the same texture (kaolinitic clay, lower CEC).
3. 2 tons/acre × 2.5 ≈ 5 t/ha.

Short trick: Clay loam, warm humid, pH 5.5 → 6.5 ≈ 5 t/ha limestone.

Concept: Na⁺ is a large hydrated monovalent ion; it expands the diffuse double layer and disperses (deflocculates) clay.

1. Dispersed clay clogs pores → poor infiltration, poor aeration, hard surface crust.
2. Ca²⁺ (gypsum) does the opposite – flocculation.

Short trick: Na disperses, Ca flocculates – hence gypsum for sodic soils.

Concept: Saline soil: EC of saturation extract > 4 dS/m, ESP < 15, pH < 8.5.

1. EC < 4 dS/m is the normal/sodic range.
2. 3.0 and 2.0 dS/m are below the salinity limit.

Short trick: Saline = 'more than 4'.

Concept: Salinity of irrigation water is caused by neutral soluble salts, chiefly chlorides (and sulphates) of Na, Ca and Mg; high Cl^- water raises soil EC.

1. Excess sodium (high SAR/RSC) causes sodicity (alkali soil), not salinity.
2. Calcium is the ameliorant; phosphorus is not a salinity factor.

Short trick: Chloride → salinity; Sodium → sodicity; Carbonate/bicarbonate → RSC.

Concept: Active acidity = H⁺ and Al³⁺ in the soil solution; it is what pH measures.

1. Exchangeable (salt-replaceable) acidity – H/Al held on exchange sites.
2. Reserve (residual) acidity – bound in OM/clay; Total = active + exchangeable + reserve.

Short trick: Solution = active; colloid surface = exchangeable/reserve.

Concept: Meteorological drought (IMD): seasonal rainfall deficient by more than 25% of the normal (long-period average).

1. Deficit 26–50% = moderate, >50% = severe.
2. Hydrological – depletion of surface/ground water; Agricultural – soil moisture insufficient for crop.

Short trick: Rain deficit → meteorological; reservoirs → hydrological; crop → agricultural.

Concept: The moisture index (Thornthwaite's index, used by Krishnan for delineating India's dry-farming/climatic zones) is $\mathrm{MI}=\frac{P-PE}{PE}\times 100$, where P = precipitation and PE = potential evapotranspiration.

1. Every printed option, in both languages, has the product P × PE (or only PE) in the numerator – none has the difference P − PE.
2. Option (A) would be correct only if its '×' were read as '−'; as printed, $\frac{P\times PE}{PE}\times 100$ simply equals 100P, which is not a moisture index. (B) equals 100PE, (C) and (D) are dimensionally meaningless as an index.
3. So no option is correct as printed and the question is treated as a bonus.

Short trick: MI = (P − PE)/PE × 100 – water surplus or deficit as % of demand; negative = dry (arid < −66.7).

Concept: Specific heat (cal g^-1 °C^-1): water 1.0, organic matter (humus) ≈ 0.5, dry mineral soil ≈ 0.2.

1. So humus-rich and wet soils warm up slowly.
2. 0.2 is the value for mineral soil, 1.0 for water.

Short trick: Water 1 : humus ½ : mineral soil ⅕.